3357 |
Minimize the Maximum Adjacent Element Difference |
Hard |
Array, Greedy, Binary_Search |
13 |
100.00 |
3356 |
Zero Array Transformation II |
Medium |
Array, Binary_Search, Prefix_Sum |
5 |
100.00 |
3355 |
Zero Array Transformation I |
Medium |
Array, Prefix_Sum |
6 |
36.84 |
3354 |
Make Array Elements Equal to Zero |
Easy |
Array, Simulation, Prefix_Sum |
153 |
96.67 |
3352 |
Count K-Reducible Numbers Less Than N |
Hard |
String, Dynamic_Programming, Math, Combinatorics |
170 |
100.00 |
3351 |
Sum of Good Subsequences |
Hard |
Array, Hash_Table, Dynamic_Programming |
16 |
100.00 |
3350 |
Adjacent Increasing Subarrays Detection II |
Medium |
Array, Binary_Search |
947 |
48.57 |
3349 |
Adjacent Increasing Subarrays Detection I |
Easy |
Array |
179 |
97.92 |
3348 |
Smallest Divisible Digit Product II |
Hard |
String, Math, Greedy, Backtracking, Number_Theory |
46 |
100.00 |
3347 |
Maximum Frequency of an Element After Performing Operations II |
Hard |
Array, Sorting, Binary_Search, Prefix_Sum, Sliding_Window |
48 |
100.00 |
3346 |
Maximum Frequency of an Element After Performing Operations I |
Medium |
Array, Sorting, Binary_Search, Prefix_Sum, Sliding_Window |
12 |
100.00 |
3345 |
Smallest Divisible Digit Product I |
Easy |
Math, Enumeration |
1 |
100.00 |
3343 |
Count Number of Balanced Permutations |
Hard |
String, Dynamic_Programming, Math, Combinatorics |
66 |
100.00 |
3342 |
Find Minimum Time to Reach Last Room II |
Medium |
Array, Matrix, Heap_Priority_Queue, Graph, Shortest_Path |
122 |
100.00 |
3341 |
Find Minimum Time to Reach Last Room I |
Medium |
Array, Matrix, Heap_Priority_Queue, Graph, Shortest_Path |
257 |
42.10 |
3340 |
Check Balanced String |
Easy |
String |
1 |
100.00 |
3337 |
Total Characters in String After Transformations II |
Hard |
String, Hash_Table, Dynamic_Programming, Math, Counting |
320 |
100.00 |
3336 |
Find the Number of Subsequences With Equal GCD |
Hard |
Array, Dynamic_Programming, Math, Number_Theory |
324 |
100.00 |
3335 |
Total Characters in String After Transformations I |
Medium |
String, Hash_Table, Dynamic_Programming, Math, Counting |
58 |
80.00 |
3334 |
Find the Maximum Factor Score of Array |
Medium |
Array, Math, Number_Theory |
4 |
95.83 |
3333 |
Find the Original Typed String II |
Hard |
String, Dynamic_Programming, Prefix_Sum |
490 |
100.00 |
3332 |
Maximum Points Tourist Can Earn |
Medium |
Array, Dynamic_Programming, Matrix |
216 |
100.00 |
3331 |
Find Subtree Sizes After Changes |
Medium |
Array, String, Hash_Table, Depth_First_Search, Tree |
139 |
95.24 |
3330 |
Find the Original Typed String I |
Easy |
String |
142 |
88.24 |
3327 |
Check if DFS Strings Are Palindromes |
Hard |
Array, String, Hash_Table, Depth_First_Search, Tree, Hash_Function |
165 |
100.00 |
3326 |
Minimum Division Operations to Make Array Non Decreasing |
Medium |
Array, Math, Greedy, Number_Theory |
24 |
94.12 |
3325 |
Count Substrings With K-Frequency Characters I |
Medium |
String, Hash_Table, Sliding_Window |
3 |
88.00 |
3324 |
Find the Sequence of Strings Appeared on the Screen |
Medium |
String, Simulation |
8 |
100.00 |
3321 |
Find X-Sum of All K-Long Subarrays II |
Hard |
Array, Hash_Table, Heap_Priority_Queue, Sliding_Window |
1660 |
100.00 |
3320 |
Count The Number of Winning Sequences |
Hard |
String, Dynamic_Programming |
335 |
100.00 |
3319 |
K-th Largest Perfect Subtree Size in Binary Tree |
Medium |
Sorting, Depth_First_Search, Tree, Binary_Tree |
332 |
45.45 |
3318 |
Find X-Sum of All K-Long Subarrays I |
Easy |
Array, Hash_Table, Heap_Priority_Queue, Sliding_Window |
262 |
86.21 |
3317 |
Find the Number of Possible Ways for an Event |
Hard |
Dynamic_Programming, Math, Combinatorics |
166 |
100.00 |
3316 |
Find Maximum Removals From Source String |
Medium |
Array, String, Hash_Table, Dynamic_Programming, Two_Pointers |
220 |
100.00 |
3315 |
Construct the Minimum Bitwise Array II |
Medium |
Array, Bit_Manipulation |
231 |
77.27 |
3314 |
Construct the Minimum Bitwise Array I |
Easy |
Array, Bit_Manipulation |
226 |
57.14 |
3312 |
Sorted GCD Pair Queries |
Hard |
Array, Hash_Table, Math, Binary_Search, Prefix_Sum, Counting, Number_Theory, Combinatorics |
734 |
100.00 |
3311 |
Construct 2D Grid Matching Graph Layout |
Hard |
Array, Hash_Table, Matrix, Graph |
1423 |
100.00 |
3310 |
Remove Methods From Project |
Medium |
Depth_First_Search, Breadth_First_Search, Graph |
1465 |
100.00 |
3309 |
Maximum Possible Number by Binary Concatenation |
Medium |
Array, Bit_Manipulation, Enumeration |
182 |
73.47 |
3307 |
Find the K-th Character in String Game II |
Hard |
Math, Bit_Manipulation, Recursion |
189 |
50.00 |
3306 |
Count of Substrings Containing Every Vowel and K Consonants II |
Medium |
String, Hash_Table, Sliding_Window |
651 |
100.00 |
3305 |
Count of Substrings Containing Every Vowel and K Consonants I |
Medium |
String, Hash_Table, Sliding_Window |
153 |
100.00 |
3304 |
Find the K-th Character in String Game I |
Easy |
Math, Bit_Manipulation, Simulation, Recursion |
140 |
96.43 |
3303 |
Find the Occurrence of First Almost Equal Substring |
Hard |
String, String_Matching |
364 |
100.00 |
3302 |
Find the Lexicographically Smallest Valid Sequence |
Medium |
String, Dynamic_Programming, Greedy, Two_Pointers |
705 |
100.00 |
3301 |
Maximize the Total Height of Unique Towers |
Medium |
Array, Sorting, Greedy |
761 |
87.50 |
3300 |
Minimum Element After Replacement With Digit Sum |
Easy |
Array, Math |
153 |
100.00 |
3298 |
Count Substrings That Can Be Rearranged to Contain a String II |
Hard |
String, Hash_Table, Sliding_Window |
433 |
78.57 |
3297 |
Count Substrings That Can Be Rearranged to Contain a String I |
Medium |
String, Hash_Table, Sliding_Window |
215 |
93.33 |
3296 |
Minimum Number of Seconds to Make Mountain Height Zero |
Medium |
Array, Math, Binary_Search |
228 |
87.50 |
3295 |
Report Spam Message |
Medium |
Array, String, Hash_Table |
782 |
74.19 |
3292 |
Minimum Number of Valid Strings to Form Target II |
Hard |
Array, String, Dynamic_Programming, Binary_Search, Segment_Tree, Hash_Function, String_Matching, Rolling_Hash |
674 |
50.00 |
3291 |
Minimum Number of Valid Strings to Form Target I |
Medium |
Array, String, Dynamic_Programming, Binary_Search, Trie, Segment_Tree, Hash_Function, String_Matching, Rolling_Hash |
566 |
70.00 |
3290 |
Maximum Multiplication Score |
Medium |
Array, Dynamic_Programming |
749 |
66.67 |
3289 |
The Two Sneaky Numbers of Digitville |
Easy |
Array, Hash_Table, Math |
223 |
68.97 |
3288 |
Length of the Longest Increasing Path |
Hard |
Array, Sorting, Binary_Search |
984 |
83.33 |
3287 |
Find the Maximum Sequence Value of Array |
Hard |
Array, Dynamic_Programming, Bit_Manipulation |
2893 |
33.33 |
3286 |
Find a Safe Walk Through a Grid |
Medium |
Array, Breadth_First_Search, Matrix, Heap_Priority_Queue, Graph, Shortest_Path |
357 |
48.28 |
3285 |
Find Indices of Stable Mountains |
Easy |
Array |
195 |
92.68 |
3283 |
Maximum Number of Moves to Kill All Pawns |
Hard |
Array, Math, Breadth_First_Search, Bit_Manipulation, Bitmask, Game_Theory |
638 |
100.00 |
3282 |
Reach End of Array With Max Score |
Medium |
Array, Greedy |
789 |
90.91 |
3281 |
Maximize Score of Numbers in Ranges |
Medium |
Array, Sorting, Greedy, Binary_Search |
710 |
88.24 |
3280 |
Convert Date to Binary |
Easy |
String, Math |
174 |
79.31 |
3277 |
Maximum XOR Score Subarray Queries |
Hard |
Array, Dynamic_Programming |
1269 |
100.00 |
3276 |
Select Cells in Grid With Maximum Score |
Hard |
Array, Dynamic_Programming, Matrix, Bit_Manipulation, Bitmask |
213 |
92.31 |
3275 |
K-th Nearest Obstacle Queries |
Medium |
Array, Heap_Priority_Queue |
1277 |
100.00 |
3274 |
Check if Two Chessboard Squares Have the Same Color |
Easy |
String, Math |
164 |
38.64 |
3273 |
Minimum Amount of Damage Dealt to Bob |
Hard |
Array, Sorting, Greedy |
793 |
90.00 |
3272 |
Find the Count of Good Integers |
Hard |
Hash_Table, Math, Enumeration, Combinatorics |
452 |
80.00 |
3271 |
Hash Divided String |
Medium |
String, Simulation |
178 |
100.00 |
3270 |
Find the Key of the Numbers |
Easy |
Math |
122 |
97.83 |
3267 |
Count Almost Equal Pairs II |
Hard |
Array, Hash_Table, Sorting, Counting, Enumeration |
814 |
100.00 |
3266 |
Final Array State After K Multiplication Operations II |
Hard |
Array, Heap_Priority_Queue, Simulation |
500 |
100.00 |
3265 |
Count Almost Equal Pairs I |
Medium |
Array, Hash_Table, Sorting, Counting, Enumeration |
184 |
100.00 |
3264 |
Final Array State After K Multiplication Operations I |
Easy |
Array, Math, Heap_Priority_Queue, Simulation |
237 |
55.55 |
3261 |
Count Substrings That Satisfy K-Constraint II |
Hard |
Array, String, Binary_Search, Prefix_Sum, Sliding_Window |
1005 |
100.00 |
3260 |
Find the Largest Palindrome Divisible by K |
Hard |
String, Dynamic_Programming, Math, Greedy, Number_Theory |
211 |
100.00 |
3259 |
Maximum Energy Boost From Two Drinks |
Medium |
Array, Dynamic_Programming |
811 |
96.88 |
3258 |
Count Substrings That Satisfy K-Constraint I |
Easy |
String, Sliding_Window |
155 |
92.86 |
3257 |
Maximum Value Sum by Placing Three Rooks II |
Hard |
Array, Dynamic_Programming, Matrix, Enumeration |
770 |
100.00 |
3256 |
Maximum Value Sum by Placing Three Rooks I |
Hard |
Array, Dynamic_Programming, Matrix, Enumeration |
279 |
100.00 |
3255 |
Find the Power of K-Size Subarrays II |
Medium |
Array, Sliding_Window |
892 |
89.36 |
3254 |
Find the Power of K-Size Subarrays I |
Medium |
Array, Sliding_Window |
245 |
92.59 |
3251 |
Find the Count of Monotonic Pairs II |
Hard |
Array, Dynamic_Programming, Math, Prefix_Sum, Combinatorics |
291 |
100.00 |
3250 |
Find the Count of Monotonic Pairs I |
Hard |
Array, Dynamic_Programming, Math, Prefix_Sum, Combinatorics |
241 |
100.00 |
3249 |
Count the Number of Good Nodes |
Medium |
Depth_First_Search, Tree |
1190 |
100.00 |
3248 |
Snake in Matrix |
Easy |
Array, String, Simulation |
174 |
90.91 |
3245 |
Alternating Groups III |
Hard |
Array, Binary_Indexed_Tree |
1072 |
100.00 |
3244 |
Shortest Distance After Road Addition Queries II |
Hard |
Array, Greedy, Graph, Ordered_Set |
794 |
92.31 |
3243 |
Shortest Distance After Road Addition Queries I |
Medium |
Array, Breadth_First_Search, Graph |
313 |
97.06 |
3242 |
Design Neighbor Sum Service |
Easy |
Array, Hash_Table, Matrix, Design, Simulation |
333 |
75.00 |
3241 |
Time Taken to Mark All Nodes |
Hard |
Dynamic_Programming, Depth_First_Search, Tree, Graph |
1228 |
100.00 |
3240 |
Minimum Number of Flips to Make Binary Grid Palindromic II |
Medium |
Array, Matrix, Two_Pointers |
805 |
100.00 |
3239 |
Minimum Number of Flips to Make Binary Grid Palindromic I |
Medium |
Array, Matrix, Two_Pointers |
856 |
87.50 |
3238 |
Find the Number of Winning Players |
Easy |
Array, Hash_Table, Counting |
207 |
90.38 |
3235 |
Check if the Rectangle Corner Is Reachable |
Hard |
Array, Math, Depth_First_Search, Breadth_First_Search, Union_Find, Geometry |
612 |
66.67 |
3234 |
Count the Number of Substrings With Dominant Ones |
Medium |
String, Sliding_Window, Enumeration |
356 |
100.00 |
3233 |
Find the Count of Numbers Which Are Not Special |
Medium |
Array, Math, Number_Theory |
215 |
76.19 |
3232 |
Find if Digit Game Can Be Won |
Easy |
Array, Math |
194 |
36.00 |
3229 |
Minimum Operations to Make Array Equal to Target |
Hard |
Array, Dynamic_Programming, Greedy, Stack, Monotonic_Stack |
636 |
57.14 |
3228 |
Maximum Number of Operations to Move Ones to the End |
Medium |
String, Greedy, Counting |
232 |
44.00 |
3227 |
Vowels Game in a String |
Medium |
String, Math, Game_Theory, Brainteaser |
234 |
90.32 |
3226 |
Number of Bit Changes to Make Two Integers Equal |
Easy |
Bit_Manipulation |
136 |
61.90 |
3225 |
Maximum Score From Grid Operations |
Hard |
Array, Dynamic_Programming, Matrix, Prefix_Sum |
371 |
100.00 |
3224 |
Minimum Array Changes to Make Differences Equal |
Medium |
Array, Hash_Table, Prefix_Sum |
665 |
84.62 |
3223 |
Minimum Length of String After Operations |
Medium |
String, Hash_Table, Counting |
316 |
60.00 |
3222 |
Find the Winning Player in Coin Game |
Easy |
Math, Simulation, Game_Theory |
140 |
86.44 |
3220 |
Odd and Even Transactions |
Medium |
Database |
248 |
85.85 |
3219 |
Minimum Cost for Cutting Cake II |
Hard |
Array, Sorting, Greedy |
776 |
100.00 |
3218 |
Minimum Cost for Cutting Cake I |
Medium |
Array, Dynamic_Programming, Sorting, Greedy |
175 |
78.05 |
3217 |
Delete Nodes From Linked List Present in Array |
Medium |
Array, Hash_Table, Linked_List |
872 |
98.31 |
3216 |
Lexicographically Smallest String After a Swap |
Easy |
String, Greedy |
157 |
95.16 |
3213 |
Construct String with Minimum Cost |
Hard |
Array, String, Dynamic_Programming, Suffix_Array |
1176 |
46.67 |
3212 |
Count Submatrices With Equal Frequency of X and Y |
Medium |
Array, Matrix, Prefix_Sum |
1009 |
78.95 |
3211 |
Generate Binary Strings Without Adjacent Zeros |
Medium |
String, Bit_Manipulation, Recursion |
237 |
38.18 |
3210 |
Find the Encrypted String |
Easy |
String |
170 |
62.69 |
3209 |
Number of Subarrays With AND Value of K |
Hard |
Array, Binary_Search, Bit_Manipulation, Segment_Tree |
530 |
100.00 |
3208 |
Alternating Groups II |
Medium |
Array, Sliding_Window |
449 |
97.62 |
3207 |
Maximum Points After Enemy Battles |
Medium |
Array, Greedy |
470 |
100.00 |
3206 |
Alternating Groups I |
Easy |
Array, Sliding_Window |
167 |
88.14 |
3203 |
Find Minimum Diameter After Merging Two Trees |
Hard |
Depth_First_Search, Breadth_First_Search, Tree, Graph |
1156 |
100.00 |
3202 |
Find the Maximum Length of Valid Subsequence II |
Medium |
Array, Dynamic_Programming |
255 |
97.30 |
3201 |
Find the Maximum Length of Valid Subsequence I |
Medium |
Array, Dynamic_Programming |
512 |
89.36 |
3200 |
Maximum Height of a Triangle |
Easy |
Array, Enumeration |
136 |
81.36 |
3197 |
Find the Minimum Area to Cover All Ones II |
Hard |
Array, Matrix, Enumeration |
216 |
100.00 |
3196 |
Maximize Total Cost of Alternating Subarrays |
Medium |
Array, Dynamic_Programming |
496 |
73.81 |
3195 |
Find the Minimum Area to Cover All Ones I |
Medium |
Array, Matrix |
1068 |
73.91 |
3194 |
Minimum Average of Smallest and Largest Elements |
Easy |
Array, Sorting, Two_Pointers |
192 |
94.25 |
3193 |
Count the Number of Inversions |
Hard |
Array, Dynamic_Programming |
243 |
94.74 |
3192 |
Minimum Operations to Make Binary Array Elements Equal to One II |
Medium |
Array, Dynamic_Programming, Greedy |
684 |
64.29 |
3191 |
Minimum Operations to Make Binary Array Elements Equal to One I |
Medium |
Array, Bit_Manipulation, Prefix_Sum, Sliding_Window, Queue |
653 |
57.35 |
3190 |
Find Minimum Operations to Make All Elements Divisible by Three |
Easy |
Array, Math |
153 |
87.95 |
3187 |
Peaks in Array |
Hard |
Array, Segment_Tree, Binary_Indexed_Tree |
1339 |
80.00 |
3186 |
Maximum Total Damage With Spell Casting |
Medium |
Array, Hash_Table, Dynamic_Programming, Sorting, Binary_Search, Two_Pointers, Counting |
1106 |
92.73 |
3185 |
Count Pairs That Form a Complete Day II |
Medium |
Array, Hash_Table, Counting |
578 |
78.33 |
3184 |
Count Pairs That Form a Complete Day I |
Easy |
Array, Hash_Table, Counting |
171 |
68.42 |
3181 |
Maximum Total Reward Using Operations II |
Hard |
Array, Dynamic_Programming, Bit_Manipulation |
376 |
100.00 |
3180 |
Maximum Total Reward Using Operations I |
Medium |
Array, Dynamic_Programming |
183 |
100.00 |
3179 |
Find the N-th Value After K Seconds |
Medium |
Array, Math, Simulation, Prefix_Sum, Combinatorics |
175 |
100.00 |
3178 |
Find the Child Who Has the Ball After K Seconds |
Easy |
Math, Simulation |
136 |
82.35 |
3177 |
Find the Maximum Length of a Good Subsequence II |
Hard |
Array, Hash_Table, Dynamic_Programming |
284 |
100.00 |
3176 |
Find the Maximum Length of a Good Subsequence I |
Medium |
Array, Hash_Table, Dynamic_Programming |
183 |
100.00 |
3175 |
Find The First Player to win K Games in a Row |
Medium |
Array, Simulation |
536 |
100.00 |
3174 |
Clear Digits |
Easy |
String, Hash_Table, Simulation |
180 |
70.18 |
3171 |
Find Subarray With Bitwise AND Closest to K |
Hard |
Array, Binary_Search, Bit_Manipulation, Segment_Tree |
520 |
100.00 |
3170 |
Lexicographically Minimum String After Removing Stars |
Medium |
String, Hash_Table, Greedy, Stack, Heap_Priority_Queue |
316 |
100.00 |
3169 |
Count Days Without Meetings |
Medium |
Array, Sorting |
733 |
97.59 |
3168 |
Minimum Number of Chairs in a Waiting Room |
Easy |
String, Simulation |
148 |
86.52 |
3165 |
Maximum Sum of Subsequence With Non-adjacent Elements |
Hard |
Array, Dynamic_Programming, Divide_and_Conquer, Segment_Tree |
109 |
100.00 |
3164 |
Find the Number of Good Pairs II |
Medium |
Array, Hash_Table |
1175 |
90.00 |
3163 |
String Compression III |
Medium |
String |
331 |
66.13 |
3162 |
Find the Number of Good Pairs I |
Easy |
Array, Hash_Table |
182 |
54.41 |
3161 |
Block Placement Queries |
Hard |
Array, Binary_Search, Segment_Tree, Binary_Indexed_Tree |
1701 |
100.00 |
3160 |
Find the Number of Distinct Colors Among the Balls |
Medium |
Array, Hash_Table, Simulation |
1055 |
58.82 |
3159 |
Find Occurrences of an Element in an Array |
Medium |
Array, Hash_Table |
810 |
98.28 |
3158 |
Find the XOR of Numbers Which Appear Twice |
Easy |
Array, Hash_Table, Bit_Manipulation |
166 |
92.21 |
3154 |
Find Number of Ways to Reach the K-th Stair |
Hard |
Dynamic_Programming, Math, Bit_Manipulation, Memoization, Combinatorics |
122 |
100.00 |
3153 |
Sum of Digit Differences of All Pairs |
Medium |
Array, Hash_Table, Math, Counting |
491 |
95.74 |
3152 |
Special Array II |
Medium |
Array, Binary_Search, Prefix_Sum |
707 |
93.83 |
3151 |
Special Array I |
Easy |
Array |
165 |
92.21 |
3149 |
Find the Minimum Cost Array Permutation |
Hard |
Array, Dynamic_Programming, Bit_Manipulation, Bitmask |
329 |
100.00 |
3148 |
Maximum Difference Score in a Grid |
Medium |
Array, Dynamic_Programming, Matrix |
777 |
84.62 |
3147 |
Taking Maximum Energy From the Mystic Dungeon |
Medium |
Array, Prefix_Sum |
671 |
79.17 |
3146 |
Permutation Difference between Two Strings |
Easy |
String, Hash_Table |
177 |
58.21 |
3145 |
Find Products of Elements of Big Array |
Hard |
Array, Binary_Search, Bit_Manipulation |
210 |
100.00 |
3144 |
Minimum Substring Partition of Equal Character Frequency |
Medium |
String, Hash_Table, Dynamic_Programming, Counting |
232 |
88.00 |
3143 |
Maximum Points Inside the Square |
Medium |
Array, String, Hash_Table, Sorting, Binary_Search |
650 |
59.52 |
3142 |
Check if Grid Satisfies Conditions |
Easy |
Array, Matrix |
170 |
91.84 |
3139 |
Minimum Cost to Equalize Array |
Hard |
Array, Greedy, Enumeration |
495 |
100.00 |
3138 |
Minimum Length of Anagram Concatenation |
Medium |
String, Hash_Table, Counting |
219 |
91.67 |
3137 |
Minimum Number of Operations to Make Word K-Periodic |
Medium |
String, Hash_Table, Counting |
291 |
96.30 |
3136 |
Valid Word |
Easy |
String |
160 |
92.50 |
3134 |
Find the Median of the Uniqueness Array |
Hard |
Array, Hash_Table, Binary_Search, Sliding_Window |
733 |
100.00 |
3133 |
Minimum Array End |
Medium |
Bit_Manipulation |
131 |
90.91 |
3132 |
Find the Integer Added to Array II |
Medium |
Array, Sorting, Two_Pointers, Enumeration |
189 |
84.85 |
3131 |
Find the Integer Added to Array I |
Easy |
Array |
162 |
98.15 |
3130 |
Find All Possible Stable Binary Arrays II |
Hard |
Dynamic_Programming, Prefix_Sum |
242 |
100.00 |
3129 |
Find All Possible Stable Binary Arrays I |
Medium |
Dynamic_Programming, Prefix_Sum |
169 |
92.86 |
3128 |
Right Triangles |
Medium |
Array, Hash_Table, Math, Counting, Combinatorics |
975 |
40.63 |
3127 |
Make a Square with the Same Color |
Easy |
Array, Matrix, Enumeration |
149 |
80.00 |
3123 |
Find Edges in Shortest Paths |
Hard |
Depth_First_Search, Breadth_First_Search, Heap_Priority_Queue, Graph, Shortest_Path |
931 |
100.00 |
3122 |
Minimum Number of Operations to Satisfy Conditions |
Medium |
Array, Dynamic_Programming, Matrix |
948 |
80.77 |
3121 |
Count the Number of Special Characters II |
Medium |
String, Hash_Table |
274 |
90.74 |
3120 |
Count the Number of Special Characters I |
Easy |
String, Hash_Table |
145 |
97.26 |
3117 |
Minimum Sum of Values by Dividing Array |
Hard |
Array, Dynamic_Programming, Binary_Search, Bit_Manipulation, Queue, Segment_Tree |
244 |
100.00 |
3116 |
Kth Smallest Amount With Single Denomination Combination |
Hard |
Array, Math, Binary_Search, Bit_Manipulation, Number_Theory, Combinatorics |
158 |
100.00 |
3115 |
Maximum Prime Difference |
Medium |
Array, Math, Number_Theory |
555 |
79.63 |
3114 |
Latest Time You Can Obtain After Replacing Characters |
Easy |
String, Enumeration |
161 |
83.58 |
3113 |
Find the Number of Subarrays Where Boundary Elements Are Maximum |
Hard |
Array, Binary_Search, Stack, Monotonic_Stack |
606 |
88.89 |
3112 |
Minimum Time to Visit Disappearing Nodes |
Medium |
Array, Heap_Priority_Queue, Graph, Shortest_Path |
828 |
94.44 |
3111 |
Minimum Rectangles to Cover Points |
Medium |
Array, Sorting, Greedy |
701 |
96.15 |
3110 |
Score of a String |
Easy |
String |
144 |
91.51 |
3108 |
Minimum Cost Walk in Weighted Graph |
Hard |
Array, Bit_Manipulation, Graph, Union_Find |
791 |
100.00 |
3107 |
Minimum Operations to Make Median of Array Equal to K |
Medium |
Array, Sorting, Greedy |
554 |
100.00 |
3106 |
Lexicographically Smallest String After Operations With Constraint |
Medium |
String, Greedy |
162 |
74.19 |
3105 |
Longest Strictly Increasing or Strictly Decreasing Subarray |
Easy |
Array |
159 |
94.00 |
3102 |
Minimize Manhattan Distances |
Hard |
Array, Math |
701 |
95.83 |
3101 |
Count Alternating Subarrays |
Medium |
Array, Math |
499 |
97.78 |
3100 |
Water Bottles II |
Medium |
Math, Simulation |
137 |
70.49 |
3099 |
Harshad Number |
Easy |
Math |
119 |
82.67 |
3098 |
Find the Sum of Subsequence Powers |
Hard |
Array, Dynamic_Programming, Sorting |
294 |
77.78 |
3097 |
Shortest Subarray With OR at Least K II |
Medium |
Array, Bit_Manipulation, Sliding_Window |
489 |
93.33 |
3096 |
Minimum Levels to Gain More Points |
Medium |
Array, Prefix_Sum |
850 |
100.00 |
3095 |
Shortest Subarray With OR at Least K I |
Easy |
Array, Bit_Manipulation, Sliding_Window |
161 |
95.65 |
3093 |
Longest Common Suffix Queries |
Hard |
Array, String, Trie |
860 |
89.29 |
3092 |
Most Frequent IDs |
Medium |
Array, Hash_Table, Heap_Priority_Queue, Ordered_Set |
758 |
100.00 |
3091 |
Apply Operations to Make Sum of Array Greater Than or Equal to k |
Medium |
Math, Greedy, Enumeration |
134 |
73.21 |
3090 |
Maximum Length Substring With Two Occurrences |
Easy |
String, Hash_Table, Sliding_Window |
157 |
90.24 |
3086 |
Minimum Moves to Pick K Ones |
Hard |
Array, Greedy, Prefix_Sum, Sliding_Window |
368 |
100.00 |
3085 |
Minimum Deletions to Make String K-Special |
Medium |
String, Hash_Table, Sorting, Greedy, Counting |
221 |
93.33 |
3084 |
Count Substrings Starting and Ending with Given Character |
Medium |
String, Math, Counting |
177 |
98.55 |
3083 |
Existence of a Substring in a String and Its Reverse |
Easy |
String, Hash_Table |
168 |
79.49 |
3082 |
Find the Sum of the Power of All Subsequences |
Hard |
Array, Dynamic_Programming |
176 |
90.00 |
3081 |
Replace Question Marks in String to Minimize Its Value |
Medium |
String, Hash_Table, Sorting, Greedy, Heap_Priority_Queue, Counting |
249 |
100.00 |
3080 |
Mark Elements on Array by Performing Queries |
Medium |
Array, Hash_Table, Sorting, Heap_Priority_Queue, Simulation |
937 |
97.78 |
3079 |
Find the Sum of Encrypted Integers |
Easy |
Array, Math |
172 |
80.60 |
3077 |
Maximum Strength of K Disjoint Subarrays |
Hard |
Array, Dynamic_Programming, Prefix_Sum |
351 |
75.00 |
3076 |
Shortest Uncommon Substring in an Array |
Medium |
Array, String, Hash_Table, Trie |
256 |
100.00 |
3075 |
Maximize Happiness of Selected Children |
Medium |
Array, Sorting, Greedy |
608 |
93.24 |
3074 |
Apple Redistribution into Boxes |
Easy |
Array, Sorting, Greedy |
168 |
97.37 |
3072 |
Distribute Elements Into Two Arrays II |
Hard |
Array, Simulation, Segment_Tree, Binary_Indexed_Tree |
890 |
100.00 |
3071 |
Minimum Operations to Write the Letter Y on a Grid |
Medium |
Array, Hash_Table, Matrix, Counting |
268 |
91.11 |
3070 |
Count Submatrices with Top-Left Element and Sum Less Than k |
Medium |
Array, Matrix, Prefix_Sum |
773 |
85.71 |
3069 |
Distribute Elements Into Two Arrays I |
Easy |
Array, Simulation |
207 |
96.92 |
3068 |
Find the Maximum Sum of Node Values |
Hard |
Array, Dynamic_Programming, Sorting, Greedy, Tree, Bit_Manipulation |
531 |
66.67 |
3067 |
Count Pairs of Connectable Servers in a Weighted Tree Network |
Medium |
Array, Depth_First_Search, Tree |
578 |
83.33 |
3066 |
Minimum Operations to Exceed Threshold Value II |
Medium |
Array, Heap_Priority_Queue, Simulation |
543 |
98.11 |
3065 |
Minimum Operations to Exceed Threshold Value I |
Easy |
Array |
180 |
71.76 |
3049 |
Earliest Second to Mark Indices II |
Hard |
Array, Greedy, Binary_Search, Heap_Priority_Queue |
220 |
100.00 |
3048 |
Earliest Second to Mark Indices I |
Medium |
Array, Binary_Search |
223 |
75.00 |
3047 |
Find the Largest Area of Square Inside Two Rectangles |
Medium |
Array, Math, Geometry |
753 |
40.42 |
3046 |
Split the Array |
Easy |
Array, Hash_Table, Counting |
173 |
75.00 |
3045 |
Count Prefix and Suffix Pairs II |
Hard |
Array, String, Trie, Hash_Function, String_Matching, Rolling_Hash |
344 |
100.00 |
3044 |
Most Frequent Prime |
Medium |
Array, Hash_Table, Math, Matrix, Counting, Enumeration, Number_Theory |
198 |
100.00 |
3043 |
Find the Length of the Longest Common Prefix |
Medium |
Array, String, Hash_Table, Trie |
623 |
76.32 |
3042 |
Count Prefix and Suffix Pairs I |
Easy |
Array, String, Trie, Hash_Function, String_Matching, Rolling_Hash |
160 |
96.72 |
3041 |
Maximize Consecutive Elements in an Array After Modification |
Hard |
Array, Dynamic_Programming, Sorting |
551 |
100.00 |
3040 |
Maximum Number of Operations With the Same Score II |
Medium |
Array, Dynamic_Programming, Memoization |
179 |
100.00 |
3039 |
Apply Operations to Make String Empty |
Medium |
Array, Hash_Table, Sorting, Counting |
335 |
97.73 |
3038 |
Maximum Number of Operations With the Same Score I |
Easy |
Array, Simulation |
142 |
100.00 |
3036 |
Number of Subarrays That Match a Pattern II |
Hard |
Array, Hash_Function, String_Matching, Rolling_Hash |
768 |
83.33 |
3035 |
Maximum Palindromes After Operations |
Medium |
Array, String, Hash_Table, Sorting, Greedy, Counting |
214 |
100.00 |
3034 |
Number of Subarrays That Match a Pattern I |
Medium |
Array, Hash_Function, String_Matching, Rolling_Hash |
225 |
38.09 |
3033 |
Modify the Matrix |
Easy |
Array, Matrix |
270 |
41.94 |
3031 |
Minimum Time to Revert Word to Initial State II |
Hard |
String, Hash_Function, String_Matching, Rolling_Hash |
328 |
52.94 |
3030 |
Find the Grid of Region Average |
Medium |
Array, Matrix |
1250 |
86.96 |
3029 |
Minimum Time to Revert Word to Initial State I |
Medium |
String, Hash_Function, String_Matching, Rolling_Hash |
160 |
82.05 |
3028 |
Ant on the Boundary |
Easy |
Array, Simulation, Prefix_Sum |
155 |
87.32 |
3027 |
Find the Number of Ways to Place People II |
Hard |
Array, Math, Sorting, Enumeration, Geometry |
477 |
78.95 |
3026 |
Maximum Good Subarray Sum |
Medium |
Array, Hash_Table, Prefix_Sum |
756 |
71.43 |
3025 |
Find the Number of Ways to Place People I |
Medium |
Array, Math, Sorting, Enumeration, Geometry |
252 |
44.12 |
3024 |
Type of Triangle |
Easy |
Array, Math, Sorting |
163 |
81.03 |
3022 |
Minimize OR of Remaining Elements Using Operations |
Hard |
Array, Greedy, Bit_Manipulation |
516 |
77.78 |
3021 |
Alice and Bob Playing Flower Game |
Medium |
Math |
141 |
43.24 |
3020 |
Find the Maximum Number of Elements in Subset |
Medium |
Array, Hash_Table, Enumeration |
626 |
82.22 |
3019 |
Number of Changing Keys |
Easy |
String, Breadth_First_Search, Graph, Prefix_Sum |
157 |
80.52 |
3017 |
Count the Number of Houses at a Certain Distance II |
Hard |
Breadth_First_Search, Graph, Prefix_Sum |
414 |
50.00 |
3016 |
Minimum Number of Pushes to Type Word II |
Medium |
String, Hash_Table, Sorting, Greedy, Breadth_First_Search, Graph, Prefix_Sum, Counting |
290 |
92.00 |
3015 |
Count the Number of Houses at a Certain Distance I |
Medium |
Breadth_First_Search, Graph, Prefix_Sum |
203 |
90.91 |
3014 |
Minimum Number of Pushes to Type Word I |
Easy |
String, Math, Greedy |
152 |
58.67 |
3013 |
Divide an Array Into Subarrays With Minimum Cost II |
Hard |
Array, Hash_Table, Heap_Priority_Queue, Sliding_Window |
1165 |
100.00 |
3012 |
Minimize Length of Array Using Operations |
Medium |
Array, Math, Greedy, Number_Theory |
533 |
86.36 |
3011 |
Find if Array Can Be Sorted |
Medium |
Array, Sorting, Bit_Manipulation |
199 |
79.49 |
3010 |
Divide an Array Into Subarrays With Minimum Cost I |
Easy |
Array, Sorting, Enumeration |
170 |
94.23 |
3008 |
Find Beautiful Indices in the Given Array II |
Hard |
String, Binary_Search, Two_Pointers, Hash_Function, String_Matching, Rolling_Hash |
730 |
96.67 |
3007 |
Maximum Number That Sum of the Prices Is Less Than or Equal to K |
Medium |
Dynamic_Programming, Binary_Search, Bit_Manipulation |
133 |
100.00 |
3006 |
Find Beautiful Indices in the Given Array I |
Medium |
String, Binary_Search, Two_Pointers, Hash_Function, String_Matching, Rolling_Hash |
287 |
94.92 |
3005 |
Count Elements With Maximum Frequency |
Easy |
Array, Hash_Table, Counting |
168 |
80.00 |
3003 |
Maximize the Number of Partitions After Operations |
Hard |
String, Dynamic_Programming, Bit_Manipulation, Bitmask |
147 |
100.00 |
3002 |
Maximum Size of a Set After Removals |
Medium |
Array, Hash_Table, Greedy |
467 |
100.00 |
3001 |
Minimum Moves to Capture The Queen |
Medium |
Array, Enumeration |
1 |
100.00 |
3000 |
Maximum Area of Longest Diagonal Rectangle |
Easy |
Array |
167 |
94.44 |
2999 |
Count the Number of Powerful Integers |
Hard |
String, Dynamic_Programming, Math |
163 |
100.00 |
2998 |
Minimum Number of Operations to Make X and Y Equal |
Medium |
Dynamic_Programming, Breadth_First_Search, Memoization |
149 |
100.00 |
2997 |
Minimum Number of Operations to Make Array XOR Equal to K |
Medium |
Array, Bit_Manipulation |
452 |
84.38 |
2996 |
Smallest Missing Integer Greater Than Sequential Prefix Sum |
Easy |
Array, Hash_Table, Sorting |
174 |
83.33 |
2983 |
Palindrome Rearrangement Queries |
Hard |
String, Hash_Table, Prefix_Sum |
905 |
87.50 |
2982 |
Find Longest Special Substring That Occurs Thrice II |
Medium |
String, Hash_Table, Binary_Search, Counting, Sliding_Window |
343 |
100.00 |
2981 |
Find Longest Special Substring That Occurs Thrice I |
Medium |
String, Hash_Table, Binary_Search, Counting, Sliding_Window |
208 |
90.70 |
2980 |
Check if Bitwise OR Has Trailing Zeros |
Easy |
Array, Bit_Manipulation |
183 |
89.58 |
2977 |
Minimum Cost to Convert String II |
Hard |
Array, String, Dynamic_Programming, Graph, Trie, Shortest_Path |
697 |
100.00 |
2976 |
Minimum Cost to Convert String I |
Medium |
Array, String, Graph, Shortest_Path |
421 |
85.29 |
2975 |
Maximum Square Area by Removing Fences From a Field |
Medium |
Array, Hash_Table, Enumeration |
1283 |
96.77 |
2974 |
Minimum Number Game |
Easy |
Array, Sorting, Heap_Priority_Queue, Simulation |
213 |
97.92 |
2973 |
Find Number of Coins to Place in Tree Nodes |
Hard |
Dynamic_Programming, Sorting, Depth_First_Search, Tree, Heap_Priority_Queue |
1134 |
90.91 |
2972 |
Count the Number of Incremovable Subarrays II |
Hard |
Array, Binary_Search, Two_Pointers |
483 |
100.00 |
2971 |
Find Polygon With the Largest Perimeter |
Medium |
Array, Sorting, Greedy, Prefix_Sum |
534 |
97.06 |
2970 |
Count the Number of Incremovable Subarrays I |
Easy |
Array, Binary_Search, Two_Pointers, Enumeration |
170 |
100.00 |
2968 |
Apply Operations to Maximize Frequency Score |
Hard |
Array, Sorting, Binary_Search, Prefix_Sum, Sliding_Window |
566 |
90.00 |
2967 |
Minimum Cost to Make Array Equalindromic |
Medium |
Array, Math, Sorting, Greedy |
363 |
100.00 |
2966 |
Divide Array Into Arrays With Max Difference |
Medium |
Array, Sorting, Greedy |
977 |
60.00 |
2965 |
Find Missing and Repeated Values |
Easy |
Array, Hash_Table, Math, Matrix |
235 |
91.67 |
2963 |
Count the Number of Good Partitions |
Hard |
Array, Hash_Table, Math, Combinatorics |
600 |
100.00 |
2962 |
Count Subarrays Where Max Element Appears at Least K Times |
Medium |
Array, Sliding_Window |
587 |
88.37 |
2961 |
Double Modular Exponentiation |
Medium |
Array, Math, Simulation |
197 |
92.50 |
2960 |
Count Tested Devices After Test Operations |
Easy |
Array, Simulation |
168 |
86.96 |
2959 |
Number of Possible Sets of Closing Branches |
Hard |
Bit_Manipulation, Heap_Priority_Queue, Graph, Enumeration, Shortest_Path |
231 |
87.50 |
2958 |
Length of Longest Subarray With at Most K Frequency |
Medium |
Array, Hash_Table, Sliding_Window |
485 |
100.00 |
2957 |
Remove Adjacent Almost-Equal Characters |
Medium |
String, Dynamic_Programming, Greedy |
158 |
56.52 |
2956 |
Find Common Elements Between Two Arrays |
Easy |
Array, Hash_Table |
271 |
94.20 |
2954 |
Count the Number of Infection Sequences |
Hard |
Array, Math, Combinatorics |
1493 |
100.00 |
2953 |
Count Complete Substrings |
Hard |
String, Hash_Table, Sliding_Window |
315 |
100.00 |
2952 |
Minimum Number of Coins to be Added |
Medium |
Array, Sorting, Greedy |
439 |
87.10 |
2951 |
Find the Peaks |
Easy |
Array, Enumeration |
188 |
93.75 |
2949 |
Count Beautiful Substrings II |
Hard |
String, Hash_Table, Math, Prefix_Sum, Number_Theory |
299 |
100.00 |
2948 |
Make Lexicographically Smallest Array by Swapping Elements |
Medium |
Array, Sorting, Union_Find |
928 |
94.59 |
2947 |
Count Beautiful Substrings I |
Medium |
String, Prefix_Sum, Enumeration |
291 |
59.52 |
2946 |
Matrix Similarity After Cyclic Shifts |
Easy |
Array, Math, Matrix, Simulation |
210 |
75.00 |
2945 |
Find Maximum Non-decreasing Array Length |
Hard |
Array, Dynamic_Programming, Binary_Search, Stack, Monotonic_Stack, Queue, Monotonic_Queue |
636 |
87.50 |
2944 |
Minimum Number of Coins for Fruits |
Medium |
Array, Dynamic_Programming, Heap_Priority_Queue, Queue, Monotonic_Queue |
194 |
84.62 |
2943 |
Maximize Area of Square Hole in Grid |
Medium |
Array, Sorting |
180 |
86.67 |
2942 |
Find Words Containing Character |
Easy |
Array, String |
216 |
98.97 |
2940 |
Find Building Where Alice and Bob Can Meet |
Hard |
Array, Binary_Search, Stack, Heap_Priority_Queue, Monotonic_Stack, Segment_Tree, Binary_Indexed_Tree |
928 |
90.00 |
2939 |
Maximum Xor Product |
Medium |
Math, Greedy, Bit_Manipulation |
151 |
76.19 |
2938 |
Separate Black and White Balls |
Medium |
String, Greedy, Two_Pointers |
199 |
98.21 |
2937 |
Make Three Strings Equal |
Easy |
String |
186 |
83.78 |
2935 |
Maximum Strong Pair XOR II |
Hard |
Array, Hash_Table, Bit_Manipulation, Sliding_Window, Trie |
748 |
84.38 |
2934 |
Minimum Operations to Maximize Last Elements in Arrays |
Medium |
Array, Greedy |
243 |
81.25 |
2933 |
High-Access Employees |
Medium |
Array, String, Hash_Table, Sorting |
304 |
91.67 |
2932 |
Maximum Strong Pair XOR I |
Easy |
Array, Hash_Table, Bit_Manipulation, Sliding_Window, Trie |
192 |
43.08 |
2931 |
Maximum Spending After Buying Items |
Hard |
Array, Sorting, Greedy, Matrix, Heap_Priority_Queue |
541 |
93.75 |
2930 |
Number of Strings Which Can Be Rearranged to Contain Substring |
Medium |
Dynamic_Programming, Math, Combinatorics |
132 |
100.00 |
2929 |
Distribute Candies Among Children II |
Medium |
Math, Enumeration, Combinatorics |
163 |
66.67 |
2928 |
Distribute Candies Among Children I |
Easy |
Math, Enumeration, Combinatorics |
141 |
86.36 |
2926 |
Maximum Balanced Subsequence Sum |
Hard |
Array, Dynamic_Programming, Binary_Search, Segment_Tree, Binary_Indexed_Tree |
636 |
100.00 |
2925 |
Maximum Score After Applying Operations on a Tree |
Medium |
Dynamic_Programming, Depth_First_Search, Tree |
706 |
81.82 |
2924 |
Find Champion II |
Medium |
Graph |
422 |
81.82 |
2923 |
Find Champion I |
Easy |
Array, Matrix |
320 |
58.62 |
2920 |
Maximum Points After Collecting Coins From All Nodes |
Hard |
Array, Dynamic_Programming, Depth_First_Search, Tree, Bit_Manipulation |
1007 |
100.00 |
2919 |
Minimum Increment Operations to Make Array Beautiful |
Medium |
Array, Dynamic_Programming |
520 |
62.50 |
2918 |
Minimum Equal Sum of Two Arrays After Replacing Zeros |
Medium |
Array, Greedy |
598 |
100.00 |
2917 |
Find the K-or of an Array |
Easy |
Array, Bit_Manipulation |
191 |
76.47 |
2916 |
Subarrays Distinct Element Sum of Squares II |
Hard |
Array, Dynamic_Programming, Segment_Tree, Binary_Indexed_Tree |
467 |
100.00 |
2915 |
Length of the Longest Subsequence That Sums to Target |
Medium |
Array, Dynamic_Programming |
552 |
66.67 |
2914 |
Minimum Number of Changes to Make Binary String Beautiful |
Medium |
String |
180 |
100.00 |
2913 |
Subarrays Distinct Element Sum of Squares I |
Easy |
Array, Hash_Table |
184 |
95.74 |
2911 |
Minimum Changes to Make K Semi-palindromes |
Hard |
String, Dynamic_Programming, Two_Pointers |
216 |
100.00 |
2910 |
Minimum Number of Groups to Create a Valid Assignment |
Medium |
Array, Hash_Table, Greedy |
745 |
75.00 |
2909 |
Minimum Sum of Mountain Triplets II |
Medium |
Array |
463 |
100.00 |
2908 |
Minimum Sum of Mountain Triplets I |
Easy |
Array |
174 |
73.33 |
2906 |
Construct Product Matrix |
Medium |
Array, Matrix, Prefix_Sum |
1016 |
100.00 |
2905 |
Find Indices With Index and Value Difference II |
Medium |
Array |
485 |
50.00 |
2904 |
Shortest and Lexicographically Smallest Beautiful String |
Medium |
String, Sliding_Window |
169 |
66.67 |
2903 |
Find Indices With Index and Value Difference I |
Easy |
Array |
192 |
100.00 |
2902 |
Count of Sub-Multisets With Bounded Sum |
Hard |
Array, Hash_Table, Dynamic_Programming, Sliding_Window |
263 |
87.50 |
2901 |
Longest Unequal Adjacent Groups Subsequence II |
Medium |
Array, String, Dynamic_Programming |
305 |
100.00 |
2900 |
Longest Unequal Adjacent Groups Subsequence I |
Easy |
Array, String, Dynamic_Programming, Greedy |
294 |
100.00 |
2899 |
Last Visited Integers |
Easy |
Array, String, Simulation |
209 |
72.73 |
2897 |
Apply Operations on Array to Maximize Sum of Squares |
Hard |
Array, Hash_Table, Greedy, Bit_Manipulation |
572 |
100.00 |
2896 |
Apply Operations to Make Two Strings Equal |
Medium |
String, Dynamic_Programming |
181 |
66.67 |
2895 |
Minimum Processing Time |
Medium |
Array, Sorting, Greedy |
662 |
80.00 |
2894 |
Divisible and Non-divisible Sums Difference |
Easy |
Math |
135 |
76.92 |
2891 |
Method Chaining |
Easy |
|
412 |
99.23 |
2890 |
Reshape Data: Melt |
Easy |
|
446 |
97.89 |
2889 |
Reshape Data: Pivot |
Easy |
|
416 |
99.87 |
2888 |
Reshape Data: Concatenate |
Easy |
|
441 |
96.26 |
2887 |
Fill Missing Data |
Easy |
|
404 |
97.11 |
2886 |
Change Data Type |
Easy |
|
421 |
94.57 |
2885 |
Rename Columns |
Easy |
|
467 |
68.13 |
2884 |
Modify Columns |
Easy |
|
401 |
96.35 |
2883 |
Drop Missing Data |
Easy |
|
429 |
94.97 |
2882 |
Drop Duplicate Rows |
Easy |
|
405 |
97.36 |
2881 |
Create a New Column |
Easy |
|
437 |
81.98 |
2880 |
Select Data |
Easy |
|
428 |
94.99 |
2879 |
Display the First Three Rows |
Easy |
|
406 |
96.44 |
2878 |
Get the Size of a DataFrame |
Easy |
|
413 |
94.68 |
2877 |
Create a DataFrame from List |
Easy |
|
406 |
82.57 |
2876 |
Count Visited Nodes in a Directed Graph |
Hard |
Dynamic_Programming, Graph, Memoization |
922 |
100.00 |
2875 |
Minimum Size Subarray in Infinite Array |
Medium |
Array, Hash_Table, Prefix_Sum, Sliding_Window |
372 |
100.00 |
2874 |
Maximum Value of an Ordered Triplet II |
Medium |
Array |
508 |
100.00 |
2873 |
Maximum Value of an Ordered Triplet I |
Easy |
Array |
157 |
94.12 |
2872 |
Maximum Number of K-Divisible Components |
Hard |
Dynamic_Programming, Depth_First_Search, Tree |
780 |
100.00 |
2871 |
Split Array Into Maximum Number of Subarrays |
Medium |
Array, Greedy, Bit_Manipulation |
490 |
100.00 |
2870 |
Minimum Number of Operations to Make Array Empty |
Medium |
Array, Hash_Table, Greedy, Counting |
503 |
80.00 |
2869 |
Minimum Operations to Collect Elements |
Easy |
Array, Hash_Table |
156 |
100.00 |
2867 |
Count Valid Paths in a Tree |
Hard |
Dynamic_Programming, Math, Depth_First_Search, Tree, Number_Theory |
793 |
100.00 |
2866 |
Beautiful Towers II |
Medium |
Array, Stack, Monotonic_Stack |
676 |
85.71 |
2865 |
Beautiful Towers I |
Medium |
Array, Stack, Monotonic_Stack |
232 |
75.00 |
2864 |
Maximum Odd Binary Number |
Easy |
String, Math, Greedy |
176 |
90.91 |
2862 |
Maximum Element-Sum of a Complete Subset of Indices |
Hard |
Array, Math, Number_Theory |
259 |
100.00 |
2861 |
Maximum Number of Alloys |
Medium |
Array, Binary_Search |
289 |
100.00 |
2860 |
Happy Students |
Medium |
Array, Sorting, Enumeration |
512 |
100.00 |
2859 |
Sum of Values at Indices With K Set Bits |
Easy |
Array, Bit_Manipulation |
177 |
100.00 |
2858 |
Minimum Edge Reversals So Every Node Is Reachable |
Hard |
Dynamic_Programming, Depth_First_Search, Breadth_First_Search, Graph |
1161 |
100.00 |
2857 |
Count Pairs of Points With Distance k |
Medium |
Array, Hash_Table, Bit_Manipulation |
1212 |
100.00 |
2856 |
Minimum Array Length After Pair Removals |
Medium |
Array, Hash_Table, Greedy, Binary_Search, Two_Pointers, Counting |
647 |
100.00 |
2855 |
Minimum Right Shifts to Sort the Array |
Easy |
Array |
169 |
75.00 |
2851 |
String Transformation |
Hard |
String, Dynamic_Programming, Math, String_Matching |
377 |
100.00 |
2850 |
Minimum Moves to Spread Stones Over Grid |
Medium |
Array, Dynamic_Programming, Breadth_First_Search, Matrix |
133 |
100.00 |
2849 |
Determine if a Cell Is Reachable at a Given Time |
Medium |
Math |
138 |
80.95 |
2848 |
Points That Intersect With Cars |
Easy |
Hash_Table, Math, Prefix_Sum |
190 |
100.00 |
2846 |
Minimum Edge Weight Equilibrium Queries in a Tree |
Hard |
Array, Tree, Graph, Strongly_Connected_Component |
982 |
100.00 |
2845 |
Count of Interesting Subarrays |
Medium |
Array, Hash_Table, Prefix_Sum |
703 |
100.00 |
2844 |
Minimum Operations to Make a Special Number |
Medium |
String, Math, Greedy, Enumeration |
162 |
60.00 |
2843 |
Count Symmetric Integers |
Easy |
Math, Enumeration |
203 |
88.24 |
2842 |
Count K-Subsequences of a String With Maximum Beauty |
Hard |
String, Hash_Table, Math, Greedy, Combinatorics |
217 |
100.00 |
2841 |
Maximum Sum of Almost Unique Subarray |
Medium |
Array, Hash_Table, Sliding_Window |
387 |
100.00 |
2840 |
Check if Strings Can be Made Equal With Operations II |
Medium |
String, Hash_Table, Sorting |
225 |
100.00 |
2839 |
Check if Strings Can be Made Equal With Operations I |
Easy |
String |
154 |
100.00 |
2836 |
Maximize Value of Function in a Ball Passing Game |
Hard |
Array, Dynamic_Programming, Bit_Manipulation |
933 |
100.00 |
2835 |
Minimum Operations to Form Subsequence With Target Sum |
Hard |
Array, Greedy, Bit_Manipulation |
183 |
100.00 |
2834 |
Find the Minimum Possible Sum of a Beautiful Array |
Medium |
Math, Greedy |
130 |
100.00 |
2833 |
Furthest Point From Origin |
Easy |
Array, Counting |
160 |
81.25 |
2831 |
Find the Longest Equal Subarray |
Medium |
Array, Hash_Table, Binary_Search, Sliding_Window |
663 |
100.00 |
2830 |
Maximize the Profit as the Salesman |
Medium |
Array, Dynamic_Programming, Sorting, Binary_Search |
776 |
100.00 |
2829 |
Determine the Minimum Sum of a k-avoiding Array |
Medium |
Math, Greedy |
162 |
75.00 |
2828 |
Check if a String Is an Acronym of Words |
Easy |
Array, String |
180 |
90.14 |
2827 |
Number of Beautiful Integers in the Range |
Hard |
Dynamic_Programming, Math |
169 |
100.00 |
2826 |
Sorting Three Groups |
Medium |
Array, Dynamic_Programming |
250 |
100.00 |
2825 |
Make String a Subsequence Using Cyclic Increments |
Medium |
String, Two_Pointers |
227 |
83.33 |
2824 |
Count Pairs Whose Sum is Less than Target |
Easy |
Array, Sorting, Two_Pointers |
168 |
90.62 |
2818 |
Apply Operations to Maximize Score |
Hard |
Array, Math, Greedy, Stack, Monotonic_Stack, Number_Theory |
727 |
100.00 |
2817 |
Minimum Absolute Difference Between Elements With Constraint |
Medium |
Array, Binary_Search, Ordered_Set |
759 |
100.00 |
2816 |
Double a Number Represented as a Linked List |
Medium |
Math, Stack, Linked_List |
393 |
100.00 |
2815 |
Max Pair Sum in an Array |
Easy |
Array, Hash_Table |
223 |
82.35 |
2813 |
Maximum Elegance of a K-Length Subsequence |
Hard |
Array, Hash_Table, Sorting, Greedy, Heap_Priority_Queue |
853 |
100.00 |
2812 |
Find the Safest Path in a Grid |
Medium |
Array, Breadth_First_Search, Binary_Search, Matrix, Union_Find |
902 |
100.00 |
2811 |
Check if it is Possible to Split Array |
Medium |
Array, Dynamic_Programming, Greedy |
180 |
100.00 |
2810 |
Faulty Keyboard |
Easy |
String, Simulation |
196 |
91.67 |
2809 |
Minimum Time to Make Array Sum At Most x |
Hard |
Array, Dynamic_Programming, Sorting |
325 |
100.00 |
2808 |
Minimum Seconds to Equalize a Circular Array |
Medium |
Array, Hash_Table, Greedy |
847 |
50.00 |
2807 |
Insert Greatest Common Divisors in Linked List |
Medium |
Array, Math, Linked_List |
225 |
67.65 |
2806 |
Account Balance After Rounded Purchase |
Easy |
Math |
108 |
100.00 |
2801 |
Count Stepping Numbers in Range |
Hard |
String, Dynamic_Programming |
288 |
100.00 |
2800 |
Shortest String That Contains Three Strings |
Medium |
String, Greedy, Enumeration |
259 |
100.00 |
2799 |
Count Complete Subarrays in an Array |
Medium |
Array, Hash_Table, Sliding_Window |
206 |
96.97 |
2798 |
Number of Employees Who Met the Target |
Easy |
Array, Enumeration |
153 |
92.50 |
2791 |
Count Paths That Can Form a Palindrome in a Tree |
Hard |
Dynamic_Programming, Depth_First_Search, Tree, Bit_Manipulation, Bitmask |
683 |
100.00 |
2790 |
Maximum Number of Groups With Increasing Length |
Hard |
Array, Math, Sorting, Greedy, Binary_Search |
545 |
100.00 |
2789 |
Largest Element in an Array after Merge Operations |
Medium |
Array, Greedy, Prefix_Sum |
683 |
73.68 |
2788 |
Split Strings by Separator |
Easy |
Array, String |
314 |
85.45 |
2787 |
Ways to Express an Integer as Sum of Powers |
Medium |
Dynamic_Programming |
152 |
100.00 |
2786 |
Visit Array Positions to Maximize Score |
Medium |
Array, Dynamic_Programming |
625 |
84.00 |
2785 |
Sort Vowels in a String |
Medium |
String, Sorting |
233 |
100.00 |
2784 |
Check if Array is Good |
Easy |
Array, Hash_Table, Sorting |
177 |
88.89 |
2781 |
Length of the Longest Valid Substring |
Hard |
Array, String, Hash_Table, Sliding_Window |
647 |
100.00 |
2780 |
Minimum Index of a Valid Split |
Medium |
Array, Hash_Table, Sorting |
640 |
91.67 |
2779 |
Maximum Beauty of an Array After Applying Operation |
Medium |
Array, Sorting, Binary_Search, Sliding_Window |
649 |
96.97 |
2778 |
Sum of Squares of Special Elements |
Easy |
Array, Simulation |
183 |
86.44 |
2772 |
Apply Operations to Make All Array Elements Equal to Zero |
Medium |
Array, Prefix_Sum |
578 |
97.06 |
2771 |
Longest Non-decreasing Subarray From Two Arrays |
Medium |
Array, Dynamic_Programming |
665 |
96.88 |
2770 |
Maximum Number of Jumps to Reach the Last Index |
Medium |
Array, Dynamic_Programming |
325 |
51.16 |
2769 |
Find the Maximum Achievable Number |
Easy |
Math |
134 |
97.89 |
2768 |
Number of Black Blocks |
Medium |
Array, Hash_Table, Enumeration |
719 |
100.00 |
2767 |
Partition String Into Minimum Beautiful Substrings |
Medium |
String, Hash_Table, Dynamic_Programming, Backtracking |
162 |
96.00 |
2766 |
Relocate Marbles |
Medium |
Array, Hash_Table, Sorting, Simulation |
1038 |
100.00 |
2765 |
Longest Alternating Subarray |
Easy |
Array, Enumeration |
191 |
97.92 |
2763 |
Sum of Imbalance Numbers of All Subarrays |
Hard |
Array, Hash_Table, Ordered_Set |
417 |
95.24 |
2762 |
Continuous Subarrays |
Medium |
Array, Heap_Priority_Queue, Sliding_Window, Ordered_Set, Queue, Monotonic_Queue |
492 |
100.00 |
2761 |
Prime Pairs With Target Sum |
Medium |
Array, Math, Enumeration, Number_Theory |
537 |
100.00 |
2760 |
Longest Even Odd Subarray With Threshold |
Easy |
Array, Sliding_Window |
285 |
95.45 |
2751 |
Robot Collisions |
Hard |
Array, Sorting, Stack, Simulation |
1049 |
100.00 |
2750 |
Ways to Split Array Into Good Subarrays |
Medium |
Array, Dynamic_Programming, Math |
916 |
100.00 |
2749 |
Minimum Operations to Make the Integer Zero |
Medium |
Bit_Manipulation, Brainteaser |
132 |
91.67 |
2748 |
Number of Beautiful Pairs |
Easy |
Array, Math, Number_Theory |
227 |
100.00 |
2747 |
Count Zero Request Servers |
Medium |
Array, Hash_Table, Sorting, Sliding_Window |
991 |
100.00 |
2746 |
Decremental String Concatenation |
Medium |
Array, String, Dynamic_Programming |
264 |
100.00 |
2745 |
Construct the Longest New String |
Medium |
Math, Greedy, Brainteaser |
146 |
97.37 |
2744 |
Find Maximum Number of String Pairs |
Easy |
Array, String, Hash_Table, Simulation |
162 |
96.81 |
2742 |
Painting the Walls |
Hard |
Array, Dynamic_Programming |
268 |
100.00 |
2741 |
Special Permutations |
Medium |
Array, Dynamic_Programming, Bit_Manipulation, Bitmask |
623 |
82.35 |
2740 |
Find the Value of the Partition |
Medium |
Array, Sorting |
431 |
100.00 |
2739 |
Total Distance Traveled |
Easy |
Math, Simulation |
177 |
100.00 |
2736 |
Maximum Sum Queries |
Hard |
Array, Sorting, Binary_Search, Stack, Monotonic_Stack, Segment_Tree, Binary_Indexed_Tree |
1043 |
100.00 |
2735 |
Collecting Chocolates |
Medium |
Array, Enumeration |
237 |
100.00 |
2734 |
Lexicographically Smallest String After Substring Operation |
Medium |
String, Greedy |
384 |
100.00 |
2733 |
Neither Minimum nor Maximum |
Easy |
Array, Sorting |
286 |
100.00 |
2732 |
Find a Good Subset of the Matrix |
Hard |
Array, Greedy, Matrix, Bit_Manipulation |
760 |
98.36 |
2731 |
Movement of Robots |
Medium |
Array, Sorting, Prefix_Sum, Brainteaser |
414 |
100.00 |
2730 |
Find the Longest Semi-Repetitive Substring |
Medium |
String, Sliding_Window |
251 |
84.62 |
2729 |
Check if The Number is Fascinating |
Easy |
Hash_Table, Math |
131 |
100.00 |
2727 |
Is Object Empty |
Easy |
|
49 |
98.24 |
2726 |
Calculator with Method Chaining |
Easy |
|
43 |
99.15 |
2725 |
Interval Cancellation |
Easy |
|
51 |
98.87 |
2724 |
Sort By |
Easy |
|
132 |
96.70 |
2723 |
Add Two Promises |
Easy |
|
56 |
97.63 |
2722 |
Join Two Arrays by ID |
Medium |
|
280 |
98.29 |
2721 |
Execute Asynchronous Functions in Parallel |
Medium |
|
63 |
99.09 |
2719 |
Count of Integers |
Hard |
String, Dynamic_Programming, Math |
208 |
100.00 |
2718 |
Sum of Matrix After Queries |
Medium |
Array, Hash_Table |
668 |
100.00 |
2717 |
Semi-Ordered Permutation |
Easy |
Array, Simulation |
186 |
100.00 |
2716 |
Minimize String Length |
Easy |
String, Hash_Table |
204 |
97.62 |
2715 |
Timeout Cancellation |
Easy |
|
53 |
97.68 |
2713 |
Maximum Strictly Increasing Cells in a Matrix |
Hard |
Array, Dynamic_Programming, Sorting, Binary_Search, Matrix, Memoization |
1141 |
100.00 |
2712 |
Minimum Cost to Make All Characters Equal |
Medium |
String, Dynamic_Programming, Greedy |
200 |
100.00 |
2711 |
Difference of Number of Distinct Values on Diagonals |
Medium |
Array, Hash_Table, Matrix |
281 |
100.00 |
2710 |
Remove Trailing Zeros From a String |
Easy |
String |
191 |
93.02 |
2709 |
Greatest Common Divisor Traversal |
Hard |
Array, Math, Union_Find, Number_Theory |
892 |
81.82 |
2708 |
Maximum Strength of a Group |
Medium |
Array, Sorting, Greedy, Backtracking |
183 |
100.00 |
2707 |
Extra Characters in a String |
Medium |
Array, String, Hash_Table, Dynamic_Programming, Trie |
276 |
85.71 |
2706 |
Buy Two Chocolates |
Easy |
Array, Sorting |
187 |
96.43 |
2705 |
Compact Object |
Medium |
|
78 |
99.38 |
2704 |
To Be Or Not To Be |
Easy |
|
49 |
97.88 |
2703 |
Return Length of Arguments Passed |
Easy |
|
47 |
98.59 |
2699 |
Modify Graph Edge Weights |
Hard |
Heap_Priority_Queue, Graph, Shortest_Path |
1592 |
40.00 |
2698 |
Find the Punishment Number of an Integer |
Medium |
Math, Backtracking |
133 |
100.00 |
2697 |
Lexicographically Smallest Palindrome |
Easy |
String, Two_Pointers |
267 |
100.00 |
2696 |
Minimum String Length After Removing Substrings |
Easy |
String, Stack, Simulation |
185 |
100.00 |
2695 |
Array Wrapper |
Easy |
|
40 |
100.00 |
2694 |
Event Emitter |
Medium |
|
45 |
99.58 |
2693 |
Call Function with Custom Context |
Medium |
Array, Dynamic_Programming, Matrix |
51 |
97.92 |
2685 |
Count the Number of Complete Components |
Medium |
Array, Dynamic_Programming, Depth_First_Search, Breadth_First_Search, Matrix, Graph |
436 |
100.00 |
2684 |
Maximum Number of Moves in a Grid |
Medium |
Array, Dynamic_Programming, Matrix |
509 |
100.00 |
2683 |
Neighboring Bitwise XOR |
Medium |
Array, Bit_Manipulation |
988 |
100.00 |
2682 |
Find the Losers of the Circular Game |
Easy |
Array, Hash_Table, Simulation |
186 |
100.00 |
2681 |
Power of Heroes |
Hard |
Array, Math, Sorting, Prefix_Sum |
454 |
85.71 |
2680 |
Maximum OR |
Medium |
Array, Greedy, Bit_Manipulation, Prefix_Sum |
592 |
90.91 |
2679 |
Sum in a Matrix |
Medium |
Array, Sorting, Matrix, Heap_Priority_Queue, Simulation |
581 |
100.00 |
2678 |
Number of Senior Citizens |
Easy |
Array, String |
163 |
96.30 |
2677 |
Chunk Array |
Easy |
|
55 |
96.89 |
2673 |
Make Costs of Paths Equal in a Binary Tree |
Medium |
Array, Dynamic_Programming, Greedy, Tree, Binary_Tree |
645 |
75.00 |
2672 |
Number of Adjacent Elements With the Same Color |
Medium |
Array |
1208 |
100.00 |
2671 |
Frequency Tracker |
Medium |
Hash_Table, Design |
1109 |
80.00 |
2670 |
Find the Distinct Difference Array |
Easy |
Array, Hash_Table |
320 |
94.74 |
2667 |
Create Hello World Function |
Easy |
|
45 |
94.20 |
2666 |
Allow One Function Call |
Easy |
|
50 |
88.35 |
2665 |
Counter II |
Easy |
|
54 |
94.09 |
2663 |
Lexicographically Smallest Beautiful String |
Hard |
String, Greedy |
324 |
100.00 |
2662 |
Minimum Cost of a Path With Special Roads |
Medium |
Array, Heap_Priority_Queue, Graph, Shortest_Path |
690 |
100.00 |
2661 |
First Completely Painted Row or Column |
Medium |
Array, Hash_Table, Matrix |
901 |
100.00 |
2660 |
Determine the Winner of a Bowling Game |
Easy |
Array, Simulation |
263 |
85.71 |
2659 |
Make Array Empty |
Hard |
Array, Sorting, Greedy, Binary_Search, Ordered_Set, Segment_Tree, Binary_Indexed_Tree |
728 |
100.00 |
2658 |
Maximum Number of Fish in a Grid |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find |
269 |
80.00 |
2657 |
Find the Prefix Common Array of Two Arrays |
Medium |
Array, Hash_Table |
288 |
88.89 |
2656 |
Maximum Sum With Exactly K Elements |
Easy |
Array, Greedy |
241 |
93.94 |
2654 |
Minimum Number of Operations to Make All Array Elements Equal to 1 |
Medium |
Array, Math, Number_Theory |
172 |
100.00 |
2653 |
Sliding Subarray Beauty |
Medium |
Array, Hash_Table, Sliding_Window |
1264 |
66.67 |
2652 |
Sum Multiples |
Easy |
Array, Math, Number_Theory |
136 |
97.53 |
2651 |
Calculate Delayed Arrival Time |
Easy |
Math |
129 |
88.00 |
2650 |
Design Cancellable Function |
Hard |
|
58 |
93.15 |
2649 |
Nested Array Generator |
Medium |
|
138 |
86.92 |
2648 |
Generate Fibonacci Sequence |
Easy |
|
42 |
98.08 |
2646 |
Minimize the Total Price of the Trips |
Hard |
Array, Dynamic_Programming, Depth_First_Search, Tree, Graph |
264 |
100.00 |
2645 |
Minimum Additions to Make Valid String |
Medium |
String, Dynamic_Programming, Greedy, Stack |
154 |
100.00 |
2644 |
Find the Maximum Divisibility Score |
Easy |
Array |
585 |
100.00 |
2643 |
Row With Maximum Ones |
Easy |
Array, Matrix |
530 |
100.00 |
2642 |
Design Graph With Shortest Path Calculator |
Hard |
Design, Heap_Priority_Queue, Graph, Shortest_Path |
789 |
100.00 |
2641 |
Cousins in Binary Tree II |
Medium |
Hash_Table, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
922 |
90.91 |
2640 |
Find the Score of All Prefixes of an Array |
Medium |
Array, Prefix_Sum |
587 |
100.00 |
2639 |
Find the Width of Columns of a Grid |
Easy |
Array, Matrix |
222 |
100.00 |
2637 |
Promise Time Limit |
Medium |
|
57 |
84.99 |
2635 |
Apply Transform Over Each Element in Array |
Easy |
|
43 |
98.46 |
2634 |
Filter Elements from Array |
Easy |
|
44 |
98.04 |
2631 |
Group By |
Medium |
|
101 |
99.50 |
2630 |
Memoize II |
Hard |
|
264 |
98.86 |
2629 |
Function Composition |
Easy |
|
58 |
95.63 |
2627 |
Debounce |
Medium |
|
50 |
98.23 |
2626 |
Array Reduce Transformation |
Easy |
|
52 |
91.40 |
2625 |
Flatten Deeply Nested Array |
Medium |
|
84 |
98.71 |
2624 |
Snail Traversal |
Medium |
|
175 |
92.96 |
2623 |
Memoize |
Medium |
|
264 |
97.20 |
2622 |
Cache With Time Limit |
Medium |
|
51 |
94.82 |
2621 |
Sleep |
Easy |
|
40 |
99.59 |
2620 |
Counter |
Easy |
|
43 |
98.60 |
2619 |
Array Prototype Last |
Easy |
|
41 |
98.99 |
2618 |
Check if Object Instance of Class |
Medium |
|
82 |
99.55 |
2617 |
Minimum Number of Visited Cells in a Grid |
Hard |
Array, Dynamic_Programming, Binary_Search, Stack, Union_Find, Segment_Tree, Binary_Indexed_Tree |
1255 |
100.00 |
2616 |
Minimize the Maximum Difference of Pairs |
Medium |
Array, Greedy, Binary_Search |
556 |
100.00 |
2615 |
Sum of Distances |
Medium |
Array, Hash_Table, Prefix_Sum |
902 |
100.00 |
2614 |
Prime In Diagonal |
Easy |
Array, Math, Matrix, Number_Theory |
465 |
100.00 |
2612 |
Minimum Reverse Operations |
Hard |
Array, Breadth_First_Search, Ordered_Set |
923 |
100.00 |
2611 |
Mice and Cheese |
Medium |
Array, Sorting, Greedy, Heap_Priority_Queue |
554 |
100.00 |
2610 |
Convert an Array Into a 2D Array With Conditions |
Medium |
Array, Hash_Table |
240 |
88.24 |
2609 |
Find the Longest Balanced Substring of a Binary String |
Easy |
String |
174 |
100.00 |
2608 |
Shortest Cycle in a Graph |
Hard |
Breadth_First_Search, Graph |
1061 |
100.00 |
2607 |
Make K-Subarray Sums Equal |
Medium |
Array, Math, Sorting, Number_Theory |
1062 |
100.00 |
2606 |
Find the Substring With Maximum Cost |
Medium |
Array, String, Hash_Table, Dynamic_Programming |
238 |
100.00 |
2605 |
Form Smallest Number From Two Digit Arrays |
Easy |
Array, Hash_Table, Enumeration |
161 |
100.00 |
2603 |
Collect Coins in a Tree |
Hard |
Array, Tree, Graph, Topological_Sort |
986 |
100.00 |
2602 |
Minimum Operations to Make All Array Elements Equal |
Medium |
Array, Sorting, Binary_Search, Prefix_Sum |
790 |
100.00 |
2601 |
Prime Subtraction Operation |
Medium |
Array, Math, Greedy, Binary_Search, Number_Theory |
233 |
100.00 |
2600 |
K Items With the Maximum Sum |
Easy |
Math, Greedy |
145 |
100.00 |
2598 |
Smallest Missing Non-negative Integer After Operations |
Medium |
Array, Hash_Table, Math, Greedy |
594 |
100.00 |
2597 |
The Number of Beautiful Subsets |
Medium |
Array, Dynamic_Programming, Backtracking |
194 |
100.00 |
2596 |
Check Knight Tour Configuration |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Simulation |
179 |
100.00 |
2595 |
Number of Even and Odd Bits |
Easy |
Bit_Manipulation |
177 |
100.00 |
2594 |
Minimum Time to Repair Cars |
Medium |
Array, Binary_Search |
416 |
100.00 |
2593 |
Find Score of an Array After Marking All Elements |
Medium |
Array, Sorting, Heap_Priority_Queue, Simulation |
738 |
100.00 |
2592 |
Maximize Greatness of an Array |
Medium |
Array, Sorting, Greedy, Two_Pointers |
748 |
100.00 |
2591 |
Distribute Money to Maximum Children |
Easy |
Math, Greedy |
155 |
100.00 |
2589 |
Minimum Time to Complete All Tasks |
Hard |
Array, Sorting, Greedy, Binary_Search, Stack |
422 |
100.00 |
2588 |
Count the Number of Beautiful Subarrays |
Medium |
Array, Hash_Table, Bit_Manipulation, Prefix_Sum |
785 |
100.00 |
2587 |
Rearrange Array to Maximize Prefix Score |
Medium |
Array, Sorting, Greedy, Prefix_Sum |
612 |
100.00 |
2586 |
Count the Number of Vowel Strings in Range |
Easy |
Array, String |
195 |
100.00 |
2585 |
Number of Ways to Earn Points |
Hard |
Array, Dynamic_Programming |
263 |
100.00 |
2584 |
Split the Array to Make Coprime Products |
Hard |
Array, Hash_Table, Math, Number_Theory |
341 |
100.00 |
2583 |
Kth Largest Sum in a Binary Tree |
Medium |
Breadth_First_Search, Tree, Binary_Search |
557 |
83.33 |
2582 |
Pass the Pillow |
Easy |
Math, Simulation |
122 |
85.71 |
2581 |
Count Number of Possible Root Nodes |
Hard |
Hash_Table, Dynamic_Programming, Depth_First_Search, Tree |
1352 |
100.00 |
2580 |
Count Ways to Group Overlapping Ranges |
Medium |
Array, Sorting |
669 |
100.00 |
2579 |
Count Total Number of Colored Cells |
Medium |
Math |
109 |
100.00 |
2578 |
Split With Minimum Sum |
Easy |
Math, Sorting, Greedy |
121 |
75.00 |
2577 |
Minimum Time to Visit a Cell In a Grid |
Hard |
Array, Breadth_First_Search, Matrix, Heap_Priority_Queue, Graph, Shortest_Path |
1446 |
100.00 |
2576 |
Find the Maximum Number of Marked Indices |
Medium |
Array, Sorting, Greedy, Binary_Search, Two_Pointers |
610 |
100.00 |
2575 |
Find the Divisibility Array of a String |
Medium |
Array, String, Math |
507 |
100.00 |
2574 |
Left and Right Sum Differences |
Easy |
Array, Prefix_Sum |
203 |
100.00 |
2573 |
Find the String with LCP |
Hard |
String, Dynamic_Programming, Greedy, Union_Find |
853 |
100.00 |
2572 |
Count the Number of Square-Free Subsets |
Medium |
Array, Dynamic_Programming, Math, Bit_Manipulation, Bitmask |
218 |
100.00 |
2571 |
Minimum Operations to Reduce an Integer to 0 |
Medium |
Dynamic_Programming, Greedy, Bit_Manipulation |
131 |
100.00 |
2570 |
Merge Two 2D Arrays by Summing Values |
Easy |
Array, Hash_Table, Two_Pointers |
221 |
91.67 |
2569 |
Handling Sum Queries After Update |
Hard |
Array, Segment_Tree |
1751 |
100.00 |
2568 |
Minimum Impossible OR |
Medium |
Array, Bit_Manipulation, Brainteaser |
468 |
100.00 |
2567 |
Minimum Score by Changing Two Elements |
Medium |
Array, Sorting, Greedy |
496 |
100.00 |
2566 |
Maximum Difference by Remapping a Digit |
Easy |
Math, Greedy |
125 |
100.00 |
2565 |
Subsequence With the Minimum Score |
Hard |
String, Binary_Search, Two_Pointers |
204 |
100.00 |
2564 |
Substring XOR Queries |
Medium |
Array, String, Hash_Table, Bit_Manipulation |
1603 |
100.00 |
2563 |
Count the Number of Fair Pairs |
Medium |
Array, Sorting, Binary_Search, Two_Pointers |
553 |
100.00 |
2562 |
Find the Array Concatenation Value |
Easy |
Array, Two_Pointers, Simulation |
175 |
100.00 |
2561 |
Rearranging Fruits |
Hard |
Array, Hash_Table, Greedy |
746 |
100.00 |
2560 |
House Robber IV |
Medium |
Array, Binary_Search |
467 |
100.00 |
2559 |
Count Vowel Strings in Ranges |
Medium |
Array, String, Prefix_Sum |
638 |
100.00 |
2558 |
Take Gifts From the Richest Pile |
Easy |
Array, Heap_Priority_Queue, Simulation |
169 |
100.00 |
2556 |
Disconnect Path in a Binary Matrix by at Most One Flip |
Medium |
Array, Dynamic_Programming, Depth_First_Search, Breadth_First_Search, Matrix |
571 |
100.00 |
2555 |
Maximize Win From Two Segments |
Medium |
Array, Binary_Search, Sliding_Window |
388 |
100.00 |
2554 |
Maximum Number of Integers to Choose From a Range I |
Medium |
Array, Hash_Table, Sorting, Greedy, Binary_Search |
543 |
100.00 |
2553 |
Separate the Digits in an Array |
Easy |
Array, Simulation |
210 |
100.00 |
2552 |
Count Increasing Quadruplets |
Hard |
Array, Dynamic_Programming, Prefix_Sum, Enumeration, Binary_Indexed_Tree |
268 |
66.67 |
2551 |
Put Marbles in Bags |
Hard |
Array, Sorting, Greedy, Heap_Priority_Queue |
818 |
100.00 |
2550 |
Count Collisions of Monkeys on a Polygon |
Medium |
Math, Recursion |
111 |
100.00 |
2549 |
Count Distinct Numbers on Board |
Easy |
Array, Hash_Table, Math, Simulation |
113 |
100.00 |
2547 |
Minimum Cost to Split an Array |
Hard |
Array, Hash_Table, Dynamic_Programming, Counting |
400 |
100.00 |
2546 |
Apply Bitwise Operations to Make Strings Equal |
Medium |
String, Bit_Manipulation |
246 |
100.00 |
2545 |
Sort the Students by Their Kth Score |
Medium |
Array, Sorting, Matrix |
442 |
100.00 |
2544 |
Alternating Digit Sum |
Easy |
Math |
122 |
60.00 |
2543 |
Check if Point Is Reachable |
Hard |
Math, Number_Theory |
134 |
100.00 |
2542 |
Maximum Subsequence Score |
Medium |
Array, Sorting, Greedy, Heap_Priority_Queue |
780 |
81.97 |
2541 |
Minimum Operations to Make Array Equal II |
Medium |
Array, Math, Greedy |
521 |
100.00 |
2540 |
Minimum Common Value |
Easy |
Array, Hash_Table, Binary_Search, Two_Pointers |
412 |
100.00 |
2538 |
Difference Between Maximum and Minimum Price Sum |
Hard |
Array, Dynamic_Programming, Depth_First_Search, Tree |
1054 |
100.00 |
2537 |
Count the Number of Good Subarrays |
Medium |
Array, Hash_Table, Sliding_Window |
553 |
100.00 |
2536 |
Increment Submatrices by One |
Medium |
Array, Matrix, Prefix_Sum |
827 |
100.00 |
2535 |
Difference Between Element Sum and Digit Sum of an Array |
Easy |
Array, Math |
231 |
66.67 |
2532 |
Time to Cross a Bridge |
Hard |
Array, Heap_Priority_Queue, Simulation |
420 |
100.00 |
2531 |
Make Number of Distinct Characters Equal |
Medium |
String, Hash_Table, Counting |
287 |
100.00 |
2530 |
Maximal Score After Applying K Operations |
Medium |
Array, Greedy, Heap_Priority_Queue |
726 |
100.00 |
2529 |
Maximum Count of Positive Integer and Negative Integer |
Easy |
Array, Binary_Search, Counting |
215 |
83.33 |
2528 |
Maximize the Minimum Powered City |
Hard |
Array, Greedy, Binary_Search, Prefix_Sum, Sliding_Window, Queue |
496 |
100.00 |
2527 |
Find Xor-Beauty of Array |
Medium |
Array, Math, Bit_Manipulation |
434 |
100.00 |
2526 |
Find Consecutive Integers from a Data Stream |
Medium |
Hash_Table, Design, Counting, Queue, Data_Stream |
867 |
100.00 |
2525 |
Categorize Box According to Criteria |
Easy |
Math |
119 |
100.00 |
2523 |
Closest Prime Numbers in Range |
Medium |
Math, Number_Theory |
136 |
100.00 |
2522 |
Partition String Into Substrings With Values at Most K |
Medium |
String, Dynamic_Programming, Greedy |
174 |
100.00 |
2521 |
Distinct Prime Factors of Product of Array |
Medium |
Array, Hash_Table, Math, Number_Theory |
229 |
100.00 |
2520 |
Count the Digits That Divide a Number |
Easy |
Math |
121 |
80.95 |
2518 |
Number of Great Partitions |
Hard |
Array, Dynamic_Programming |
164 |
100.00 |
2517 |
Maximum Tastiness of Candy Basket |
Medium |
Array, Sorting, Binary_Search |
547 |
33.33 |
2516 |
Take K of Each Character From Left and Right |
Medium |
String, Hash_Table, Sliding_Window |
189 |
100.00 |
2515 |
Shortest Distance to Target String in a Circular Array |
Easy |
Array, String |
209 |
100.00 |
2514 |
Count Anagrams |
Hard |
String, Hash_Table, Math, Counting, Combinatorics |
236 |
100.00 |
2513 |
Minimize the Maximum of Two Arrays |
Medium |
Math, Binary_Search, Number_Theory |
135 |
100.00 |
2512 |
Reward Top K Students |
Medium |
Array, String, Hash_Table, Sorting, Heap_Priority_Queue |
691 |
100.00 |
2511 |
Maximum Enemy Forts That Can Be Captured |
Easy |
Array, Two_Pointers |
142 |
100.00 |
2509 |
Cycle Length Queries in a Tree |
Hard |
Tree, Binary_Tree |
825 |
75.00 |
2508 |
Add Edges to Make Degrees of All Nodes Even |
Hard |
Hash_Table, Graph |
1045 |
100.00 |
2507 |
Smallest Value After Replacing With Sum of Prime Factors |
Medium |
Math, Number_Theory |
149 |
100.00 |
2506 |
Count Pairs Of Similar Strings |
Easy |
Array, String, Hash_Table |
208 |
100.00 |
2503 |
Maximum Number of Points From Grid Queries |
Hard |
Array, Sorting, Breadth_First_Search, Heap_Priority_Queue, Union_Find |
581 |
100.00 |
2502 |
Design Memory Allocator |
Medium |
Array, Hash_Table, Design, Simulation |
284 |
100.00 |
2501 |
Longest Square Streak in an Array |
Medium |
Array, Hash_Table, Dynamic_Programming, Sorting, Binary_Search |
585 |
100.00 |
2500 |
Delete Greatest Value in Each Row |
Easy |
Array, Sorting, Matrix |
204 |
80.00 |
2499 |
Minimum Total Cost to Make Arrays Unequal |
Hard |
Array, Hash_Table, Greedy, Counting |
628 |
100.00 |
2498 |
Frog Jump II |
Medium |
Array, Greedy, Binary_Search |
482 |
100.00 |
2497 |
Maximum Star Sum of a Graph |
Medium |
Array, Sorting, Greedy, Heap_Priority_Queue, Graph |
773 |
100.00 |
2496 |
Maximum Value of a String in an Array |
Easy |
Array, String |
138 |
100.00 |
2493 |
Divide Nodes Into the Maximum Number of Groups |
Hard |
Breadth_First_Search, Graph, Union_Find |
862 |
100.00 |
2492 |
Minimum Score of a Path Between Two Cities |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Union_Find |
929 |
91.67 |
2491 |
Divide Players Into Teams of Equal Skill |
Medium |
Array, Hash_Table, Sorting, Two_Pointers |
459 |
100.00 |
2490 |
Circular Sentence |
Easy |
String |
152 |
100.00 |
2488 |
Count Subarrays With Median K |
Hard |
Array, Hash_Table, Prefix_Sum |
464 |
100.00 |
2487 |
Remove Nodes From Linked List |
Medium |
Stack, Linked_List, Monotonic_Stack, Recursion |
770 |
50.00 |
2486 |
Append Characters to String to Make Subsequence |
Medium |
String, Greedy, Two_Pointers |
196 |
100.00 |
2485 |
Find the Pivot Integer |
Easy |
Math, Prefix_Sum |
134 |
100.00 |
2484 |
Count Palindromic Subsequences |
Hard |
String, Dynamic_Programming |
494 |
100.00 |
2483 |
Minimum Penalty for a Shop |
Medium |
String, Prefix_Sum |
210 |
66.67 |
2482 |
Difference Between Ones and Zeros in Row and Column |
Medium |
Array, Matrix, Simulation |
1061 |
100.00 |
2481 |
Minimum Cuts to Divide a Circle |
Easy |
Math, Geometry |
128 |
50.00 |
2478 |
Number of Beautiful Partitions |
Hard |
String, Dynamic_Programming |
230 |
100.00 |
2477 |
Minimum Fuel Cost to Report to the Capital |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Graph |
969 |
100.00 |
2476 |
Closest Nodes Queries in a Binary Search Tree |
Medium |
Array, Depth_First_Search, Tree, Binary_Search, Binary_Tree |
1404 |
33.33 |
2475 |
Number of Unequal Triplets in Array |
Easy |
Array, Hash_Table |
143 |
100.00 |
2472 |
Maximum Number of Non-overlapping Palindrome Substrings |
Hard |
String, Dynamic_Programming |
183 |
100.00 |
2471 |
Minimum Number of Operations to Sort a Binary Tree by Level |
Medium |
Breadth_First_Search, Tree, Binary_Tree |
789 |
100.00 |
2470 |
Number of Subarrays With LCM Equal to K |
Medium |
Array, Math, Number_Theory |
232 |
100.00 |
2469 |
Convert the Temperature |
Easy |
Math |
130 |
100.00 |
2468 |
Split Message Based on Limit |
Hard |
String, Binary_Search |
427 |
100.00 |
2467 |
Most Profitable Path in a Tree |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Tree, Graph |
850 |
100.00 |
2466 |
Count Ways To Build Good Strings |
Medium |
Dynamic_Programming |
150 |
75.00 |
2465 |
Number of Distinct Averages |
Easy |
Array, Hash_Table, Sorting, Two_Pointers |
141 |
89.47 |
2463 |
Minimum Total Distance Traveled |
Hard |
Array, Dynamic_Programming, Sorting |
153 |
100.00 |
2462 |
Total Cost to Hire K Workers |
Medium |
Array, Two_Pointers, Heap_Priority_Queue, Simulation |
588 |
81.43 |
2461 |
Maximum Sum of Distinct Subarrays With Length K |
Medium |
Array, Hash_Table, Sliding_Window |
638 |
62.50 |
2460 |
Apply Operations to an Array |
Easy |
Array, Simulation |
165 |
100.00 |
2458 |
Height of Binary Tree After Subtree Removal Queries |
Hard |
Array, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
951 |
80.00 |
2457 |
Minimum Addition to Make Integer Beautiful |
Medium |
Math, Greedy |
132 |
66.67 |
2456 |
Most Popular Video Creator |
Medium |
Array, String, Hash_Table, Sorting, Heap_Priority_Queue |
1162 |
100.00 |
2455 |
Average Value of Even Numbers That Are Divisible by Three |
Easy |
Array, Math |
196 |
80.00 |
2454 |
Next Greater Element IV |
Hard |
Array, Sorting, Binary_Search, Stack, Heap_Priority_Queue, Monotonic_Stack |
749 |
100.00 |
2453 |
Destroy Sequential Targets |
Medium |
Array, Hash_Table, Counting |
681 |
100.00 |
2452 |
Words Within Two Edits of Dictionary |
Medium |
Array, String |
256 |
100.00 |
2451 |
Odd String Difference |
Easy |
String, Hash_Table, Math |
141 |
100.00 |
2449 |
Minimum Number of Operations to Make Arrays Similar |
Hard |
Array, Sorting, Greedy |
791 |
100.00 |
2448 |
Minimum Cost to Make Array Equal |
Hard |
Array, Sorting, Binary_Search, Prefix_Sum |
387 |
80.40 |
2447 |
Number of Subarrays With GCD Equal to K |
Medium |
Array, Math, Number_Theory |
180 |
100.00 |
2446 |
Determine if Two Events Have Conflict |
Easy |
Array, String |
140 |
87.50 |
2444 |
Count Subarrays With Fixed Bounds |
Hard |
Array, Sliding_Window, Queue, Monotonic_Queue |
469 |
100.00 |
2443 |
Sum of Number and Its Reverse |
Medium |
Math, Enumeration |
216 |
100.00 |
2442 |
Count Number of Distinct Integers After Reverse Operations |
Medium |
Array, Hash_Table, Math |
652 |
83.33 |
2441 |
Largest Positive Integer That Exists With Its Negative |
Easy |
Array, Hash_Table |
266 |
66.67 |
2440 |
Create Components With Same Value |
Hard |
Array, Math, Depth_First_Search, Tree, Enumeration |
751 |
100.00 |
2439 |
Minimize Maximum of Array |
Medium |
Array, Dynamic_Programming, Greedy, Binary_Search, Prefix_Sum |
508 |
100.00 |
2438 |
Range Product Queries of Powers |
Medium |
Array, Bit_Manipulation, Prefix_Sum |
1115 |
100.00 |
2437 |
Number of Valid Clock Times |
Easy |
String, Enumeration |
133 |
64.29 |
2435 |
Paths in Matrix Whose Sum Is Divisible by K |
Hard |
Array, Dynamic_Programming, Matrix |
752 |
100.00 |
2434 |
Using a Robot to Print the Lexicographically Smallest String |
Medium |
String, Hash_Table, Greedy, Stack |
319 |
100.00 |
2433 |
Find The Original Array of Prefix Xor |
Medium |
Array, Bit_Manipulation |
618 |
80.00 |
2432 |
The Employee That Worked on the Longest Task |
Easy |
Array |
250 |
100.00 |
2430 |
Maximum Deletions on a String |
Hard |
String, Dynamic_Programming, Hash_Function, String_Matching, Rolling_Hash |
280 |
100.00 |
2429 |
Minimize XOR |
Medium |
Greedy, Bit_Manipulation |
117 |
100.00 |
2428 |
Maximum Sum of an Hourglass |
Medium |
Array, Matrix, Prefix_Sum |
274 |
50.00 |
2427 |
Number of Common Factors |
Easy |
Math, Enumeration, Number_Theory |
127 |
100.00 |
2426 |
Number of Pairs Satisfying Inequality |
Hard |
Array, Binary_Search, Ordered_Set, Divide_and_Conquer, Segment_Tree, Binary_Indexed_Tree, Merge_Sort |
490 |
100.00 |
2425 |
Bitwise XOR of All Pairings |
Medium |
Array, Bit_Manipulation, Brainteaser |
424 |
100.00 |
2424 |
Longest Uploaded Prefix |
Medium |
Binary_Search, Design, Heap_Priority_Queue, Union_Find, Ordered_Set, Segment_Tree, Binary_Indexed_Tree |
897 |
100.00 |
2423 |
Remove Letter To Equalize Frequency |
Easy |
String, Hash_Table, Counting |
135 |
100.00 |
2421 |
Number of Good Paths |
Hard |
Array, Tree, Graph, Union_Find |
909 |
100.00 |
2420 |
Find All Good Indices |
Medium |
Array, Dynamic_Programming, Prefix_Sum |
621 |
100.00 |
2419 |
Longest Subarray With Maximum Bitwise AND |
Medium |
Array, Bit_Manipulation, Brainteaser |
487 |
100.00 |
2418 |
Sort the People |
Easy |
Array, String, Hash_Table, Sorting |
248 |
100.00 |
2416 |
Sum of Prefix Scores of Strings |
Hard |
Array, String, Counting, Trie |
2062 |
50.00 |
2415 |
Reverse Odd Levels of Binary Tree |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
499 |
87.50 |
2414 |
Length of the Longest Alphabetical Continuous Substring |
Medium |
String |
235 |
100.00 |
2413 |
Smallest Even Multiple |
Easy |
Math, Number_Theory |
121 |
85.71 |
2412 |
Minimum Money Required Before Transactions |
Hard |
Array, Sorting, Greedy |
965 |
100.00 |
2411 |
Smallest Subarrays With Maximum Bitwise OR |
Medium |
Array, Binary_Search, Bit_Manipulation, Sliding_Window |
562 |
100.00 |
2410 |
Maximum Matching of Players With Trainers |
Medium |
Array, Sorting, Greedy, Two_Pointers |
565 |
83.33 |
2409 |
Count Days Spent Together |
Easy |
String, Math |
143 |
60.00 |
2407 |
Longest Increasing Subsequence II |
Hard |
Array, Dynamic_Programming, Divide_and_Conquer, Queue, Segment_Tree, Binary_Indexed_Tree, Monotonic_Queue |
518 |
100.00 |
2406 |
Divide Intervals Into Minimum Number of Groups |
Medium |
Array, Sorting, Greedy, Two_Pointers, Heap_Priority_Queue, Prefix_Sum |
772 |
100.00 |
2405 |
Optimal Partition of String |
Medium |
String, Hash_Table, Greedy |
185 |
100.00 |
2404 |
Most Frequent Even Element |
Easy |
Array, Hash_Table, Counting |
349 |
90.91 |
2402 |
Meeting Rooms III |
Hard |
Array, Sorting, Heap_Priority_Queue |
976 |
100.00 |
2401 |
Longest Nice Subarray |
Medium |
Array, Bit_Manipulation, Sliding_Window |
507 |
100.00 |
2400 |
Number of Ways to Reach a Position After Exactly k Steps |
Medium |
Dynamic_Programming, Math, Combinatorics |
126 |
100.00 |
2399 |
Check Distances Between Same Letters |
Easy |
Array, String, Hash_Table |
173 |
66.67 |
2398 |
Maximum Number of Robots Within Budget |
Hard |
Array, Binary_Search, Heap_Priority_Queue, Prefix_Sum, Sliding_Window, Queue |
507 |
100.00 |
2397 |
Maximum Rows Covered by Columns |
Medium |
Array, Matrix, Bit_Manipulation, Backtracking, Enumeration |
154 |
100.00 |
2396 |
Strictly Palindromic Number |
Medium |
Math, Two_Pointers, Brainteaser |
130 |
58.06 |
2395 |
Find Subarrays With Equal Sum |
Easy |
Array, Hash_Table |
143 |
100.00 |
2392 |
Build a Matrix With Conditions |
Hard |
Array, Matrix, Graph, Topological_Sort |
706 |
100.00 |
2391 |
Minimum Amount of Time to Collect Garbage |
Medium |
Array, String, Prefix_Sum |
537 |
100.00 |
2390 |
Removing Stars From a String |
Medium |
String, Stack, Simulation |
337 |
62.92 |
2389 |
Longest Subsequence With Limited Sum |
Easy |
Array, Sorting, Greedy, Binary_Search, Prefix_Sum |
257 |
80.00 |
2386 |
Find the K-Sum of an Array |
Hard |
Array, Sorting, Heap_Priority_Queue |
675 |
100.00 |
2385 |
Amount of Time for Binary Tree to Be Infected |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
609 |
100.00 |
2384 |
Largest Palindromic Number |
Medium |
String, Hash_Table, Greedy |
252 |
100.00 |
2383 |
Minimum Hours of Training to Win a Competition |
Easy |
Array, Greedy |
156 |
100.00 |
2382 |
Maximum Segment Sum After Removals |
Hard |
Array, Prefix_Sum, Union_Find, Ordered_Set |
857 |
50.00 |
2381 |
Shifting Letters II |
Medium |
Array, String, Prefix_Sum |
669 |
100.00 |
2380 |
Time Needed to Rearrange a Binary String |
Medium |
String, Dynamic_Programming, Simulation |
149 |
100.00 |
2379 |
Minimum Recolors to Get K Consecutive Black Blocks |
Easy |
String, Sliding_Window |
132 |
95.24 |
2376 |
Count Special Integers |
Hard |
Dynamic_Programming, Math |
125 |
100.00 |
2375 |
Construct Smallest Number From DI String |
Medium |
String, Greedy, Stack, Backtracking |
156 |
66.67 |
2374 |
Node With Highest Edge Score |
Medium |
Hash_Table, Graph |
673 |
100.00 |
2373 |
Largest Local Values in a Matrix |
Easy |
Array, Matrix |
264 |
100.00 |
2370 |
Longest Ideal Subsequence |
Medium |
String, Hash_Table, Dynamic_Programming |
255 |
100.00 |
2369 |
Check if There is a Valid Partition For The Array |
Medium |
Array, Dynamic_Programming |
533 |
100.00 |
2368 |
Reachable Nodes With Restrictions |
Medium |
Array, Hash_Table, Depth_First_Search, Breadth_First_Search, Tree, Graph |
1199 |
76.92 |
2367 |
Number of Arithmetic Triplets |
Easy |
Array, Hash_Table, Two_Pointers, Enumeration |
146 |
91.18 |
2366 |
Minimum Replacements to Sort the Array |
Hard |
Array, Math, Greedy |
433 |
100.00 |
2365 |
Task Scheduler II |
Medium |
Array, Hash_Table, Simulation |
595 |
100.00 |
2364 |
Count Number of Bad Pairs |
Medium |
Array, Hash_Table |
590 |
100.00 |
2363 |
Merge Similar Items |
Easy |
Array, Hash_Table, Sorting, Ordered_Set |
320 |
100.00 |
2360 |
Longest Cycle in a Graph |
Hard |
Depth_First_Search, Graph, Topological_Sort |
517 |
80.00 |
2359 |
Find Closest Node to Given Two Nodes |
Medium |
Depth_First_Search, Graph |
552 |
40.00 |
2358 |
Maximum Number of Groups Entering a Competition |
Medium |
Array, Math, Greedy, Binary_Search |
441 |
100.00 |
2357 |
Make Array Zero by Subtracting Equal Amounts |
Easy |
Array, Hash_Table, Sorting, Heap_Priority_Queue, Simulation |
156 |
78.95 |
2356 |
Number of Unique Subjects Taught by Each Teacher |
Easy |
Database |
839 |
96.77 |
2354 |
Number of Excellent Pairs |
Hard |
Array, Hash_Table, Binary_Search, Bit_Manipulation |
700 |
100.00 |
2353 |
Design a Food Rating System |
Medium |
Hash_Table, Design, Heap_Priority_Queue, Ordered_Set |
1204 |
100.00 |
2352 |
Equal Row and Column Pairs |
Medium |
Array, Hash_Table, Matrix, Simulation |
339 |
100.00 |
2351 |
First Letter to Appear Twice |
Easy |
String, Hash_Table, Counting |
122 |
100.00 |
2350 |
Shortest Impossible Sequence of Rolls |
Hard |
Array, Hash_Table, Greedy |
495 |
100.00 |
2349 |
Design a Number Container System |
Medium |
Hash_Table, Design, Heap_Priority_Queue, Ordered_Set |
1011 |
100.00 |
2348 |
Number of Zero-Filled Subarrays |
Medium |
Array, Math |
559 |
80.00 |
2347 |
Best Poker Hand |
Easy |
Array, Hash_Table, Counting |
146 |
33.33 |
2344 |
Minimum Deletions to Make Array Divisible |
Hard |
Array, Math, Sorting, Heap_Priority_Queue, Number_Theory |
542 |
100.00 |
2343 |
Query Kth Smallest Trimmed Number |
Medium |
Array, String, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Quickselect, Radix_Sort |
382 |
100.00 |
2342 |
Max Sum of a Pair With Equal Sum of Digits |
Medium |
Array, Hash_Table, Sorting, Heap_Priority_Queue |
636 |
83.33 |
2341 |
Maximum Number of Pairs in Array |
Easy |
Array, Hash_Table, Sorting |
160 |
100.00 |
2338 |
Count the Number of Ideal Arrays |
Hard |
Dynamic_Programming, Math, Number_Theory, Combinatorics |
201 |
100.00 |
2337 |
Move Pieces to Obtain a String |
Medium |
String, Two_Pointers |
261 |
100.00 |
2336 |
Smallest Number in Infinite Set |
Medium |
Hash_Table, Design, Heap_Priority_Queue |
308 |
95.45 |
2335 |
Minimum Amount of Time to Fill Cups |
Easy |
Array, Greedy, Heap_Priority_Queue |
140 |
100.00 |
2334 |
Subarray With Elements Greater Than Varying Threshold |
Hard |
Array, Stack, Union_Find, Monotonic_Stack |
889 |
100.00 |
2333 |
Minimum Sum of Squared Difference |
Medium |
Array, Math, Sorting, Heap_Priority_Queue |
502 |
100.00 |
2332 |
The Latest Time to Catch a Bus |
Medium |
Array, Sorting, Binary_Search, Two_Pointers |
522 |
75.00 |
2331 |
Evaluate Boolean Binary Tree |
Easy |
Depth_First_Search, Tree, Binary_Search |
199 |
91.67 |
2328 |
Number of Increasing Paths in a Grid |
Hard |
Array, Dynamic_Programming, Depth_First_Search, Breadth_First_Search, Matrix, Graph, Memoization, Topological_Sort |
689 |
79.53 |
2327 |
Number of People Aware of a Secret |
Medium |
Dynamic_Programming, Simulation, Queue |
121 |
100.00 |
2326 |
Spiral Matrix IV |
Medium |
Array, Matrix, Simulation, Linked_List |
908 |
66.67 |
2325 |
Decode the Message |
Easy |
String, Hash_Table |
169 |
96.88 |
2322 |
Minimum Score After Removals on a Tree |
Hard |
Array, Depth_First_Search, Tree, Bit_Manipulation |
412 |
100.00 |
2321 |
Maximum Score Of Spliced Array |
Hard |
Array, Dynamic_Programming |
497 |
50.00 |
2320 |
Count Number of Ways to Place Houses |
Medium |
Dynamic_Programming |
122 |
100.00 |
2319 |
Check if Matrix Is X-Matrix |
Easy |
Array, Matrix |
247 |
100.00 |
2318 |
Number of Distinct Roll Sequences |
Hard |
Dynamic_Programming, Memoization |
441 |
100.00 |
2317 |
Maximum XOR After Operations |
Medium |
Array, Math, Bit_Manipulation |
373 |
100.00 |
2316 |
Count Unreachable Pairs of Nodes in an Undirected Graph |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Union_Find |
981 |
87.50 |
2315 |
Count Asterisks |
Easy |
String |
137 |
94.44 |
2312 |
Selling Pieces of Wood |
Hard |
Backtracking |
396 |
100.00 |
2311 |
Longest Binary Subsequence Less Than or Equal to K |
Medium |
String, Dynamic_Programming, Greedy, Memoization |
140 |
100.00 |
2310 |
Sum of Numbers With Units Digit K |
Medium |
Math |
133 |
100.00 |
2309 |
Greatest English Letter in Upper and Lower Case |
Easy |
Array |
154 |
87.50 |
2306 |
Naming a Company |
Hard |
Array, String, Hash_Table, Bit_Manipulation, Enumeration |
590 |
100.00 |
2305 |
Fair Distribution of Cookies |
Medium |
Array, Dynamic_Programming, Bit_Manipulation, Backtracking, Bitmask |
255 |
100.00 |
2304 |
Minimum Path Cost in a Grid |
Medium |
Array, Dynamic_Programming, Matrix |
1048 |
100.00 |
2303 |
Calculate Amount Paid in Taxes |
Easy |
Array, Simulation |
213 |
100.00 |
2302 |
Count Subarrays With Score Less Than K |
Hard |
Array, Binary_Search, Prefix_Sum, Sliding_Window |
556 |
100.00 |
2301 |
Match Substring After Replacement |
Hard |
Array, String, Hash_Table, String_Matching |
343 |
100.00 |
2300 |
Successful Pairs of Spells and Potions |
Medium |
Array, Sorting, Binary_Search, Two_Pointers |
818 |
72.22 |
2299 |
Strong Password Checker II |
Easy |
String |
139 |
100.00 |
2296 |
Design a Text Editor |
Hard |
String, Stack, Design, Simulation, Linked_List, Doubly_Linked_List |
1268 |
100.00 |
2295 |
Replace Elements in an Array |
Medium |
Array, Hash_Table, Simulation |
913 |
100.00 |
2294 |
Partition Array Such That Maximum Difference Is K |
Medium |
Array, Sorting, Greedy |
747 |
33.33 |
2293 |
Min Max Game |
Easy |
Array, Simulation |
183 |
100.00 |
2290 |
Minimum Obstacle Removal to Reach Corner |
Hard |
Array, Breadth_First_Search, Matrix, Heap_Priority_Queue, Graph, Shortest_Path |
765 |
100.00 |
2289 |
Steps to Make Array Non-decreasing |
Medium |
Array, Stack, Linked_List, Monotonic_Stack |
509 |
50.00 |
2288 |
Apply Discount to Prices |
Medium |
String |
465 |
100.00 |
2287 |
Rearrange Characters to Make Target String |
Easy |
String, Hash_Table, Counting |
122 |
100.00 |
2286 |
Booking Concert Tickets in Groups |
Hard |
Binary_Search, Design, Segment_Tree, Binary_Indexed_Tree |
1292 |
100.00 |
2285 |
Maximum Total Importance of Roads |
Medium |
Sorting, Greedy, Heap_Priority_Queue, Graph |
947 |
100.00 |
2284 |
Sender With Largest Word Count |
Medium |
Array, String, Hash_Table, Counting |
672 |
100.00 |
2283 |
Check if Number Has Equal Digit Count and Digit Value |
Easy |
String, Hash_Table, Counting |
136 |
100.00 |
2281 |
Sum of Total Strength of Wizards |
Hard |
Array, Stack, Prefix_Sum, Monotonic_Stack |
673 |
100.00 |
2280 |
Minimum Lines to Represent a Line Chart |
Medium |
Array, Math, Sorting, Geometry, Number_Theory |
765 |
100.00 |
2279 |
Maximum Bags With Full Capacity of Rocks |
Medium |
Array, Sorting, Greedy |
551 |
80.00 |
2278 |
Percentage of Letter in String |
Easy |
String |
122 |
100.00 |
2276 |
Count Integers in Intervals |
Hard |
Design, Ordered_Set, Segment_Tree |
1256 |
100.00 |
2275 |
Largest Combination With Bitwise AND Greater Than Zero |
Medium |
Array, Hash_Table, Bit_Manipulation, Counting |
426 |
100.00 |
2274 |
Maximum Consecutive Floors Without Special Floors |
Medium |
Array, Sorting |
532 |
100.00 |
2273 |
Find Resultant Array After Removing Anagrams |
Easy |
Array, String, Hash_Table, Sorting |
200 |
93.75 |
2272 |
Substring With Largest Variance |
Hard |
Array, Dynamic_Programming |
338 |
100.00 |
2271 |
Maximum White Tiles Covered by a Carpet |
Medium |
Array, Sorting, Greedy, Binary_Search, Prefix_Sum |
692 |
100.00 |
2270 |
Number of Ways to Split Array |
Medium |
Array, Prefix_Sum |
627 |
36.36 |
2269 |
Find the K-Beauty of a Number |
Easy |
String, Math, Sliding_Window |
123 |
100.00 |
2267 |
Check if There Is a Valid Parentheses String Path |
Hard |
Array, Dynamic_Programming, Matrix |
408 |
100.00 |
2266 |
Count Number of Texts |
Medium |
String, Hash_Table, Dynamic_Programming, Math |
216 |
100.00 |
2265 |
Count Nodes Equal to Average of Subtree |
Medium |
Depth_First_Search, Tree, Binary_Tree |
174 |
100.00 |
2264 |
Largest 3-Same-Digit Number in String |
Easy |
String |
145 |
100.00 |
2262 |
Total Appeal of A String |
Hard |
String, Hash_Table, Dynamic_Programming |
202 |
100.00 |
2261 |
K Divisible Elements Subarrays |
Medium |
Array, Hash_Table, Trie, Enumeration, Hash_Function, Rolling_Hash |
263 |
100.00 |
2260 |
Minimum Consecutive Cards to Pick Up |
Medium |
Array, Hash_Table, Sliding_Window |
646 |
33.33 |
2259 |
Remove Digit From Number to Maximize Result |
Easy |
String, Greedy, Enumeration |
137 |
100.00 |
2258 |
Escape the Spreading Fire |
Hard |
Array, Breadth_First_Search, Binary_Search, Matrix |
304 |
100.00 |
2257 |
Count Unguarded Cells in the Grid |
Medium |
Array, Matrix, Simulation |
901 |
100.00 |
2256 |
Minimum Average Difference |
Medium |
Array, Prefix_Sum |
527 |
100.00 |
2255 |
Count Prefixes of a Given String |
Easy |
Array, String |
162 |
100.00 |
2251 |
Number of Flowers in Full Bloom |
Hard |
Array, Hash_Table, Sorting, Binary_Search, Prefix_Sum, Ordered_Set |
973 |
100.00 |
2250 |
Count Number of Rectangles Containing Each Point |
Medium |
Array, Sorting, Binary_Search, Binary_Indexed_Tree |
967 |
100.00 |
2249 |
Count Lattice Points Inside a Circle |
Medium |
Array, Hash_Table, Math, Enumeration, Geometry |
204 |
100.00 |
2248 |
Intersection of Multiple Arrays |
Easy |
Array, Hash_Table, Counting |
197 |
100.00 |
2246 |
Longest Path With Different Adjacent Characters |
Hard |
Array, String, Depth_First_Search, Tree, Graph, Topological_Sort |
828 |
100.00 |
2245 |
Maximum Trailing Zeros in a Cornered Path |
Medium |
Array, Matrix, Prefix_Sum |
888 |
100.00 |
2244 |
Minimum Rounds to Complete All Tasks |
Medium |
Array, Hash_Table, Greedy, Counting |
584 |
73.68 |
2243 |
Calculate Digit Sum of a String |
Easy |
String, Simulation |
141 |
100.00 |
2242 |
Maximum Score of a Node Sequence |
Hard |
Array, Sorting, Graph, Enumeration |
844 |
100.00 |
2241 |
Design an ATM Machine |
Medium |
Array, Greedy, Design |
764 |
100.00 |
2240 |
Number of Ways to Buy Pens and Pencils |
Medium |
Math, Enumeration |
143 |
100.00 |
2239 |
Find Closest Number to Zero |
Easy |
Array |
245 |
66.67 |
2236 |
Root Equals Sum of Children |
Easy |
Tree, Binary_Tree |
141 |
86.73 |
2235 |
Add Two Integers |
Easy |
Math |
131 |
65.81 |
2234 |
Maximum Total Beauty of the Gardens |
Hard |
Array, Sorting, Greedy, Binary_Search, Two_Pointers |
699 |
100.00 |
2233 |
Maximum Product After K Increments |
Medium |
Array, Greedy, Heap_Priority_Queue |
766 |
100.00 |
2232 |
Minimize Result by Adding Parentheses to Expression |
Medium |
String, Enumeration |
191 |
100.00 |
2231 |
Largest Number After Digit Swaps by Parity |
Easy |
Sorting, Heap_Priority_Queue |
124 |
100.00 |
2227 |
Encrypt and Decrypt Strings |
Hard |
Array, String, Hash_Table, Design, Trie |
483 |
75.00 |
2226 |
Maximum Candies Allocated to K Children |
Medium |
Array, Binary_Search |
544 |
66.67 |
2225 |
Find Players With Zero or One Losses |
Medium |
Array, Hash_Table, Sorting, Counting |
1323 |
65.79 |
2224 |
Minimum Number of Operations to Convert Time |
Easy |
String, Greedy |
155 |
66.67 |
2223 |
Sum of Scores of Built Strings |
Hard |
String, Binary_Search, Hash_Function, String_Matching, Rolling_Hash, Suffix_Array |
264 |
100.00 |
2222 |
Number of Ways to Select Buildings |
Medium |
String, Dynamic_Programming, Prefix_Sum |
261 |
100.00 |
2221 |
Find Triangular Sum of an Array |
Medium |
Array, Math, Simulation, Combinatorics |
257 |
100.00 |
2220 |
Minimum Bit Flips to Convert Number |
Easy |
Bit_Manipulation |
131 |
70.59 |
2218 |
Maximum Value of K Coins From Piles |
Hard |
Array, Dynamic_Programming, Prefix_Sum |
313 |
100.00 |
2217 |
Find Palindrome With Fixed Length |
Medium |
Array, Math |
541 |
100.00 |
2216 |
Minimum Deletions to Make Array Beautiful |
Medium |
Array, Greedy, Stack |
567 |
66.67 |
2215 |
Find the Difference of Two Arrays |
Easy |
Array, Hash_Table |
352 |
98.63 |
2213 |
Longest Substring of One Repeating Character |
Hard |
Array, String, Ordered_Set, Segment_Tree |
879 |
100.00 |
2212 |
Maximum Points in an Archery Competition |
Medium |
Array, Bit_Manipulation, Recursion, Enumeration |
210 |
100.00 |
2211 |
Count Collisions on a Road |
Medium |
String, Stack |
325 |
100.00 |
2210 |
Count Hills and Valleys in an Array |
Easy |
Array |
153 |
80.00 |
2209 |
Minimum White Tiles After Covering With Carpets |
Hard |
String, Dynamic_Programming, Prefix_Sum |
373 |
100.00 |
2208 |
Minimum Operations to Halve Array Sum |
Medium |
Array, Greedy, Heap_Priority_Queue |
628 |
33.33 |
2207 |
Maximize Number of Subsequences in a String |
Medium |
String, Greedy, Prefix_Sum |
295 |
100.00 |
2206 |
Divide Array Into Equal Pairs |
Easy |
Array, Hash_Table, Bit_Manipulation, Counting |
221 |
71.43 |
2203 |
Minimum Weighted Subgraph With the Required Paths |
Hard |
Graph, Shortest_Path |
1126 |
100.00 |
2202 |
Maximize the Topmost Element After K Moves |
Medium |
Array, Greedy |
491 |
50.00 |
2201 |
Count Artifacts That Can Be Extracted |
Medium |
Array, Hash_Table, Simulation |
1011 |
100.00 |
2200 |
Find All K-Distant Indices in an Array |
Easy |
Array |
200 |
100.00 |
2197 |
Replace Non-Coprime Numbers in Array |
Hard |
Array, Math, Stack, Number_Theory |
917 |
100.00 |
2196 |
Create Binary Tree From Descriptions |
Medium |
Array, Hash_Table, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
933 |
100.00 |
2195 |
Append K Integers With Minimal Sum |
Medium |
Array, Math, Sorting, Greedy |
542 |
100.00 |
2194 |
Cells in a Range on an Excel Sheet |
Easy |
String |
176 |
100.00 |
2193 |
Minimum Number of Moves to Make Palindrome |
Hard |
String, Greedy, Two_Pointers, Binary_Indexed_Tree |
176 |
100.00 |
2192 |
All Ancestors of a Node in a Directed Acyclic Graph |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort |
841 |
100.00 |
2191 |
Sort the Jumbled Numbers |
Medium |
Array, Sorting |
821 |
100.00 |
2190 |
Most Frequent Number Following Key In an Array |
Easy |
Array, Hash_Table, Counting |
188 |
100.00 |
2188 |
Minimum Time to Finish the Race |
Hard |
Array, Dynamic_Programming |
1220 |
100.00 |
2187 |
Minimum Time to Complete Trips |
Medium |
Array, Binary_Search |
660 |
90.91 |
2186 |
Minimum Number of Steps to Make Two Strings Anagram II |
Medium |
String, Hash_Table, Counting |
304 |
100.00 |
2185 |
Counting Words With a Given Prefix |
Easy |
Array, String |
172 |
100.00 |
2183 |
Count Array Pairs Divisible by K |
Hard |
Array, Math, Number_Theory |
756 |
100.00 |
2182 |
Construct String With Repeat Limit |
Medium |
String, Greedy, Heap_Priority_Queue, Counting |
311 |
100.00 |
2181 |
Merge Nodes in Between Zeros |
Medium |
Simulation, Linked_List |
794 |
100.00 |
2180 |
Count Integers With Even Digit Sum |
Easy |
Math, Simulation |
126 |
100.00 |
2179 |
Count Good Triplets in an Array |
Hard |
Array, Binary_Search, Ordered_Set, Divide_and_Conquer, Segment_Tree, Binary_Indexed_Tree, Merge_Sort |
563 |
100.00 |
2178 |
Maximum Split of Positive Even Integers |
Medium |
Math, Greedy |
486 |
55.56 |
2177 |
Find Three Consecutive Integers That Sum to a Given Number |
Medium |
Math, Simulation |
160 |
100.00 |
2176 |
Count Equal and Divisible Pairs in an Array |
Easy |
Array |
179 |
69.23 |
2172 |
Maximum AND Sum of Array |
Hard |
Array, Dynamic_Programming, Bit_Manipulation, Bitmask |
165 |
100.00 |
2171 |
Removing Minimum Number of Magic Beans |
Medium |
Array, Sorting, Prefix_Sum |
728 |
100.00 |
2170 |
Minimum Operations to Make the Array Alternating |
Medium |
Array, Hash_Table, Greedy, Counting |
531 |
100.00 |
2169 |
Count Operations to Obtain Zero |
Easy |
Math, Simulation |
127 |
77.78 |
2167 |
Minimum Time to Remove All Cars Containing Illegal Goods |
Hard |
String, Dynamic_Programming |
312 |
100.00 |
2166 |
Design Bitset |
Medium |
Array, Hash_Table, Design |
1036 |
100.00 |
2165 |
Smallest Value of the Rearranged Number |
Medium |
Math, Sorting |
129 |
100.00 |
2164 |
Sort Even and Odd Indices Independently |
Easy |
Array, Sorting |
200 |
100.00 |
2163 |
Minimum Difference in Sums After Removal of Elements |
Hard |
Array, Dynamic_Programming, Heap_Priority_Queue |
854 |
100.00 |
2162 |
Minimum Cost to Set Cooking Time |
Medium |
Math, Enumeration |
134 |
100.00 |
2161 |
Partition Array According to Given Pivot |
Medium |
Array, Two_Pointers, Simulation |
859 |
46.15 |
2160 |
Minimum Sum of Four Digit Number After Splitting Digits |
Easy |
Math, Sorting, Greedy |
133 |
88.24 |
2157 |
Groups of Strings |
Hard |
String, Bit_Manipulation, Union_Find |
930 |
100.00 |
2156 |
Find Substring With Given Hash Value |
Hard |
String, Sliding_Window, Hash_Function, Rolling_Hash |
248 |
100.00 |
2155 |
All Divisions With the Highest Score of a Binary Array |
Medium |
Array |
1171 |
100.00 |
2154 |
Keep Multiplying Found Values by Two |
Easy |
Array, Hash_Table, Sorting, Simulation |
183 |
85.71 |
2151 |
Maximum Good People Based on Statements |
Hard |
Array, Bit_Manipulation, Backtracking, Enumeration |
308 |
100.00 |
2150 |
Find All Lonely Numbers in the Array |
Medium |
Array, Hash_Table, Counting |
1045 |
50.00 |
2149 |
Rearrange Array Elements by Sign |
Medium |
Array, Two_Pointers, Simulation |
873 |
42.86 |
2148 |
Count Elements With Strictly Smaller and Greater Elements |
Easy |
Array, Sorting |
148 |
83.33 |
2147 |
Number of Ways to Divide a Long Corridor |
Hard |
String, Dynamic_Programming, Math |
361 |
100.00 |
2146 |
K Highest Ranked Items Within a Price Range |
Medium |
Array, Sorting, Breadth_First_Search, Matrix, Heap_Priority_Queue |
1373 |
100.00 |
2145 |
Count the Hidden Sequences |
Medium |
Array, Prefix_Sum |
641 |
100.00 |
2144 |
Minimum Cost of Buying Candies With Discount |
Easy |
Array, Sorting, Greedy |
169 |
75.00 |
2141 |
Maximum Running Time of N Computers |
Hard |
Array, Sorting, Greedy |
ch |
ch |
2140 |
Solving Questions With Brainpower |
Medium |
Array, Dynamic_Programming |
753 |
66.97 |
2139 |
Minimum Moves to Reach Target Score |
Medium |
Math, Greedy |
123 |
100.00 |
2138 |
Divide a String Into Groups of Size k |
Easy |
String, Simulation |
173 |
75.00 |
2136 |
Earliest Possible Day of Full Bloom |
Hard |
Array, Sorting, Greedy |
968 |
100.00 |
2135 |
Count Words Obtained After Adding a Letter |
Medium |
Array, String, Hash_Table, Sorting, Bit_Manipulation |
556 |
100.00 |
2134 |
Minimum Swaps to Group All 1’s Together II |
Medium |
Array, Sliding_Window |
465 |
33.33 |
2133 |
Check if Every Row and Column Contains All Numbers |
Easy |
Array, Hash_Table, Matrix |
404 |
100.00 |
2132 |
Stamping the Grid |
Hard |
Array, Greedy, Matrix, Prefix_Sum |
1158 |
100.00 |
2131 |
Longest Palindrome by Concatenating Two Letter Words |
Medium |
Array, String, Hash_Table, Greedy, Counting, Level_2_Day_5_Greedy |
607 |
90.00 |
2130 |
Maximum Twin Sum of a Linked List |
Medium |
Two_Pointers, Stack, Linked_List |
458 |
93.88 |
2129 |
Capitalize the Title |
Easy |
String |
140 |
100.00 |
2127 |
Maximum Employees to Be Invited to a Meeting |
Hard |
Depth_First_Search, Graph, Topological_Sort |
572 |
100.00 |
2126 |
Destroying Asteroids |
Medium |
Array, Sorting, Greedy |
560 |
100.00 |
2125 |
Number of Laser Beams in a Bank |
Medium |
Array, String, Math, Matrix |
297 |
100.00 |
2124 |
Check if All A’s Appears Before All B’s |
Easy |
String |
136 |
87.50 |
2122 |
Recover the Original Array |
Hard |
Array, Hash_Table, Sorting, Enumeration |
299 |
100.00 |
2121 |
Intervals Between Identical Elements |
Medium |
Array, Hash_Table, Prefix_Sum |
1022 |
100.00 |
2120 |
Execution of All Suffix Instructions Staying in a Grid |
Medium |
String, Simulation |
215 |
100.00 |
2119 |
A Number After a Double Reversal |
Easy |
Math |
127 |
89.47 |
2117 |
Abbreviating the Product of a Range |
Hard |
Math |
232 |
100.00 |
2116 |
Check if a Parentheses String Can Be Valid |
Medium |
String, Greedy, Stack |
315 |
42.86 |
2115 |
Find All Possible Recipes from Given Supplies |
Medium |
Array, String, Hash_Table, Graph, Topological_Sort |
514 |
100.00 |
2114 |
Maximum Number of Words Found in Sentences |
Easy |
Array, String |
183 |
88.64 |
2111 |
Minimum Operations to Make the Array K-Increasing |
Hard |
Array, Binary_Search |
558 |
100.00 |
2110 |
Number of Smooth Descent Periods of a Stock |
Medium |
Array, Dynamic_Programming, Math |
582 |
100.00 |
2109 |
Adding Spaces to a String |
Medium |
Array, String, Simulation |
624 |
100.00 |
2108 |
Find First Palindromic String in the Array |
Easy |
Array, String, Two_Pointers |
242 |
100.00 |
2106 |
Maximum Fruits Harvested After at Most K Steps |
Hard |
Array, Binary_Search, Prefix_Sum, Sliding_Window |
816 |
100.00 |
2105 |
Watering Plants II |
Medium |
Array, Two_Pointers, Simulation |
531 |
50.00 |
2104 |
Sum of Subarray Ranges |
Medium |
Array, Stack, Monotonic_Stack |
212 |
100.00 |
2103 |
Rings and Rods |
Easy |
String, Hash_Table |
131 |
89.47 |
2102 |
Sequentially Ordinal Rank Tracker |
Hard |
Design, Heap_Priority_Queue, Ordered_Set, Data_Stream |
1208 |
100.00 |
2101 |
Detonate the Maximum Bombs |
Medium |
Array, Math, Depth_First_Search, Breadth_First_Search, Graph, Geometry |
262 |
98.96 |
2100 |
Find Good Days to Rob the Bank |
Medium |
Array, Dynamic_Programming, Prefix_Sum |
695 |
100.00 |
2099 |
Find Subsequence of Length K With the Largest Sum |
Easy |
Array, Hash_Table, Sorting, Heap_Priority_Queue |
203 |
100.00 |
2097 |
Valid Arrangement of Pairs |
Hard |
Depth_First_Search, Graph, Eulerian_Circuit |
2120 |
100.00 |
2096 |
Step-By-Step Directions From a Binary Tree Node to Another |
Medium |
String, Depth_First_Search, Tree, Binary_Tree |
690 |
93.33 |
2095 |
Delete the Middle Node of a Linked List |
Medium |
Two_Pointers, Linked_List |
1115 |
50.00 |
2094 |
Finding 3-Digit Even Numbers |
Easy |
Array, Hash_Table, Sorting, Enumeration |
181 |
100.00 |
2092 |
Find All People With Secret |
Hard |
Sorting, Depth_First_Search, Breadth_First_Search, Graph, Union_Find |
1086 |
100.00 |
2091 |
Removing Minimum and Maximum From Array |
Medium |
Array, Greedy |
607 |
100.00 |
2090 |
K Radius Subarray Averages |
Medium |
Array, Sliding_Window |
874 |
85.63 |
2089 |
Find Target Indices After Sorting Array |
Easy |
Array, Sorting, Binary_Search |
180 |
90.48 |
2088 |
Count Fertile Pyramids in a Land |
Hard |
Array, Dynamic_Programming, Matrix |
489 |
100.00 |
2087 |
Minimum Cost Homecoming of a Robot in a Grid |
Medium |
Array, Greedy, Matrix |
672 |
100.00 |
2086 |
Minimum Number of Buckets Required to Collect Rainwater from Houses |
Medium |
String, Dynamic_Programming, Greedy |
208 |
100.00 |
2085 |
Count Common Words With One Occurrence |
Easy |
Array, String, Hash_Table, Counting |
192 |
100.00 |
2081 |
Sum of k-Mirror Numbers |
Hard |
Math, Enumeration |
455 |
100.00 |
2080 |
Range Frequency Queries |
Medium |
Array, Hash_Table, Binary_Search, Design, Segment_Tree |
1102 |
100.00 |
2079 |
Watering Plants |
Medium |
Array |
157 |
100.00 |
2078 |
Two Furthest Houses With Different Colors |
Easy |
Array, Greedy |
131 |
100.00 |
2076 |
Process Restricted Friend Requests |
Hard |
Graph, Union_Find |
355 |
100.00 |
2075 |
Decode the Slanted Ciphertext |
Medium |
String, Simulation |
418 |
100.00 |
2074 |
Reverse Nodes in Even Length Groups |
Medium |
Linked_List |
1197 |
50.00 |
2073 |
Time Needed to Buy Tickets |
Easy |
Array, Simulation, Queue |
145 |
100.00 |
2071 |
Maximum Number of Tasks You Can Assign |
Hard |
Array, Sorting, Greedy, Binary_Search, Queue, Monotonic_Queue |
747 |
100.00 |
2070 |
Most Beautiful Item for Each Query |
Medium |
Array, Sorting, Binary_Search |
747 |
100.00 |
2069 |
Walking Robot Simulation II |
Medium |
Design, Simulation |
636 |
100.00 |
2068 |
Check Whether Two Strings are Almost Equivalent |
Easy |
String, Hash_Table, Counting |
131 |
100.00 |
2065 |
Maximum Path Quality of a Graph |
Hard |
Array, Graph, Backtracking |
429 |
100.00 |
2064 |
Minimized Maximum of Products Distributed to Any Store |
Medium |
Array, Binary_Search |
609 |
100.00 |
2063 |
Vowels of All Substrings |
Medium |
String, Dynamic_Programming, Math, Combinatorics |
206 |
100.00 |
2062 |
Count Vowel Substrings of a String |
Easy |
String, Hash_Table |
216 |
60.00 |
2060 |
Check if an Original String Exists Given Two Encoded Strings |
Hard |
String, Dynamic_Programming |
1219 |
100.00 |
2059 |
Minimum Operations to Convert Number |
Medium |
Array, Breadth_First_Search |
285 |
66.67 |
2058 |
Find the Minimum and Maximum Number of Nodes Between Critical Points |
Medium |
Linked_List |
602 |
50.00 |
2057 |
Smallest Index With Equal Value |
Easy |
Array |
178 |
100.00 |
2056 |
Number of Valid Move Combinations On Chessboard |
Hard |
Array, String, Simulation, Backtracking |
600 |
100.00 |
2055 |
Plates Between Candles |
Medium |
Array, String, Binary_Search, Prefix_Sum |
831 |
100.00 |
2054 |
Two Best Non-Overlapping Events |
Medium |
Array, Dynamic_Programming, Sorting, Binary_Search, Heap_Priority_Queue |
851 |
100.00 |
2053 |
Kth Distinct String in an Array |
Easy |
Array, String, Hash_Table, Counting |
181 |
90.00 |
2050 |
Parallel Courses III |
Hard |
Dynamic_Programming, Graph, Topological_Sort |
974 |
100.00 |
2049 |
Count Nodes With the Highest Score |
Medium |
Array, Depth_First_Search, Tree, Binary_Tree |
483 |
100.00 |
2048 |
Next Greater Numerically Balanced Number |
Medium |
Math, Backtracking, Enumeration |
138 |
100.00 |
2047 |
Number of Valid Words in a Sentence |
Easy |
String |
202 |
100.00 |
2045 |
Second Minimum Time to Reach Destination |
Hard |
Breadth_First_Search, Graph, Shortest_Path |
862 |
100.00 |
2044 |
Count Number of Maximum Bitwise-OR Subsets |
Medium |
Array, Bit_Manipulation, Backtracking |
140 |
100.00 |
2043 |
Simple Bank System |
Medium |
Array, Hash_Table, Design, Simulation |
968 |
100.00 |
2042 |
Check if Numbers Are Ascending in a Sentence |
Easy |
String |
161 |
64.29 |
2040 |
Kth Smallest Product of Two Sorted Arrays |
Hard |
Array, Binary_Search |
1001 |
100.00 |
2039 |
The Time When the Network Becomes Idle |
Medium |
Array, Breadth_First_Search, Graph |
1197 |
100.00 |
2038 |
Remove Colored Pieces if Both Neighbors are the Same Color |
Medium |
String, Math, Greedy, Game_Theory |
216 |
74.36 |
2037 |
Minimum Number of Moves to Seat Everyone |
Easy |
Array, Sorting |
189 |
80.00 |
2035 |
Partition Array Into Two Arrays to Minimize Sum Difference |
Hard |
Array, Dynamic_Programming, Binary_Search, Two_Pointers, Bit_Manipulation, Ordered_Set, Bitmask |
1318 |
100.00 |
2034 |
Stock Price Fluctuation |
Medium |
Hash_Table, Design, Heap_Priority_Queue, Ordered_Set, Data_Stream |
985 |
100.00 |
2033 |
Minimum Operations to Make a Uni-Value Grid |
Medium |
Array, Math, Sorting, Matrix |
744 |
100.00 |
2032 |
Two Out of Three |
Easy |
Array, Hash_Table |
251 |
83.33 |
2030 |
Smallest K-Length Subsequence With Occurrences of a Letter |
Hard |
String, Greedy, Stack, Monotonic_Stack |
501 |
100.00 |
2029 |
Stone Game IX |
Medium |
Array, Math, Greedy, Counting, Game_Theory |
574 |
100.00 |
2028 |
Find Missing Observations |
Medium |
Array, Math, Simulation |
654 |
33.33 |
2027 |
Minimum Moves to Convert String |
Easy |
String, Greedy |
142 |
100.00 |
2025 |
Maximum Number of Ways to Partition an Array |
Hard |
Array, Hash_Table, Prefix_Sum, Counting, Enumeration |
1163 |
100.00 |
2024 |
Maximize the Confusion of an Exam |
Medium |
String, Binary_Search, Prefix_Sum, Sliding_Window |
223 |
83.33 |
2023 |
Number of Pairs of Strings With Concatenation Equal to Target |
Medium |
Array, String |
228 |
40.00 |
2022 |
Convert 1D Array Into 2D Array |
Easy |
Array, Matrix, Simulation |
631 |
100.00 |
2019 |
The Score of Students Solving Math Expression |
Hard |
Array, String, Dynamic_Programming, Math, Stack, Memoization |
1497 |
100.00 |
2018 |
Check if Word Can Be Placed In Crossword |
Medium |
Array, Matrix, Enumeration |
698 |
100.00 |
2017 |
Grid Game |
Medium |
Array, Matrix, Prefix_Sum |
578 |
87.50 |
2016 |
Maximum Difference Between Increasing Elements |
Easy |
Array |
140 |
100.00 |
2014 |
Longest Subsequence Repeated k Times |
Hard |
String, Greedy, Backtracking, Counting, Enumeration |
333 |
100.00 |
2013 |
Detect Squares |
Medium |
Array, Hash_Table, Design, Counting |
511 |
100.00 |
2012 |
Sum of Beauty in the Array |
Medium |
Array |
511 |
100.00 |
2011 |
Final Value of Variable After Performing Operations |
Easy |
Array, String, Simulation |
178 |
44.55 |
2009 |
Minimum Number of Operations to Make Array Continuous |
Hard |
Array, Binary_Search |
603 |
100.00 |
2008 |
Maximum Earnings From Taxi |
Medium |
Array, Dynamic_Programming, Sorting, Binary_Search |
1008 |
100.00 |
2007 |
Find Original Array From Doubled Array |
Medium |
Array, Hash_Table, Sorting, Greedy |
753 |
100.00 |
2006 |
Count Number of Pairs With Absolute Difference K |
Easy |
Array, Hash_Table, Counting |
186 |
100.00 |
2003 |
Smallest Missing Genetic Value in Each Subtree |
Hard |
Dynamic_Programming, Depth_First_Search, Tree, Union_Find |
984 |
100.00 |
2002 |
Maximum Product of the Length of Two Palindromic Subsequences |
Medium |
String, Dynamic_Programming, Bit_Manipulation, Backtracking, Bitmask |
389 |
100.00 |
2001 |
Number of Pairs of Interchangeable Rectangles |
Medium |
Array, Hash_Table, Math, Counting, Number_Theory |
797 |
100.00 |
2000 |
Reverse Prefix of Word |
Easy |
String, Two_Pointers |
164 |
31.25 |
1998 |
GCD Sort of an Array |
Hard |
Array, Math, Sorting, Union_Find |
437 |
100.00 |
1997 |
First Day Where You Have Been in All the Rooms |
Medium |
Array, Dynamic_Programming |
572 |
100.00 |
1996 |
The Number of Weak Characters in the Game |
Medium |
Array, Sorting, Greedy, Stack, Monotonic_Stack |
1234 |
100.00 |
1995 |
Count Special Quadruplets |
Easy |
Array, Enumeration |
146 |
100.00 |
1994 |
The Number of Good Subsets |
Hard |
Array, Dynamic_Programming, Math, Bit_Manipulation, Bitmask |
737 |
100.00 |
1993 |
Operations on Tree |
Medium |
Hash_Table, Depth_First_Search, Breadth_First_Search, Tree, Design |
1117 |
100.00 |
1992 |
Find All Groups of Farmland |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix |
768 |
100.00 |
1991 |
Find the Middle Index in Array |
Easy |
Array, Prefix_Sum |
142 |
100.00 |
1987 |
Number of Unique Good Subsequences |
Hard |
String, Dynamic_Programming |
248 |
100.00 |
1986 |
Minimum Number of Work Sessions to Finish the Tasks |
Medium |
Array, Dynamic_Programming, Bit_Manipulation, Backtracking, Bitmask |
153 |
100.00 |
1985 |
Find the Kth Largest Integer in the Array |
Medium |
Array, String, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Quickselect |
397 |
100.00 |
1984 |
Minimum Difference Between Highest and Lowest of K Scores |
Easy |
Array, Sorting, Sliding_Window |
227 |
83.33 |
1982 |
Find Array Given Subset Sums |
Hard |
Array, Divide_and_Conquer |
640 |
100.00 |
1981 |
Minimize the Difference Between Target and Chosen Elements |
Medium |
Array, Dynamic_Programming, Matrix |
588 |
100.00 |
1980 |
Find Unique Binary String |
Medium |
Array, String, Backtracking |
186 |
50.00 |
1979 |
Find Greatest Common Divisor of Array |
Easy |
Array, Math, Number_Theory |
172 |
100.00 |
1978 |
Employees Whose Manager Left the Company |
Easy |
Database |
686 |
64.74 |
1977 |
Number of Ways to Separate Numbers |
Hard |
String, Dynamic_Programming, Suffix_Array |
199 |
100.00 |
1976 |
Number of Ways to Arrive at Destination |
Medium |
Dynamic_Programming, Graph, Topological_Sort, Shortest_Path |
282 |
100.00 |
1975 |
Maximum Matrix Sum |
Medium |
Array, Greedy, Matrix |
535 |
100.00 |
1974 |
Minimum Time to Type Word Using Special Typewriter |
Easy |
String, Greedy |
139 |
71.43 |
1971 |
Find if Path Exists in Graph |
Easy |
Depth_First_Search, Breadth_First_Search, Graph |
949 |
86.89 |
1970 |
Last Day Where You Can Still Cross |
Hard |
Array, Depth_First_Search, Breadth_First_Search, Binary_Search, Matrix, Union_Find |
703 |
100.00 |
1969 |
Minimum Non-Zero Product of the Array Elements |
Medium |
Math, Greedy, Recursion |
131 |
100.00 |
1968 |
Array With Elements Not Equal to Average of Neighbors |
Medium |
Array, Sorting, Greedy |
973 |
83.33 |
1967 |
Number of Strings That Appear as Substrings in Word |
Easy |
String |
157 |
100.00 |
1965 |
Employees With Missing Information |
Easy |
Database, SQL_I_Day_4_Union_and_Select |
949 |
88.66 |
1964 |
Find the Longest Valid Obstacle Course at Each Position |
Hard |
Array, Binary_Search, Binary_Indexed_Tree |
846 |
40.00 |
1963 |
Minimum Number of Swaps to Make the String Balanced |
Medium |
String, Greedy, Two_Pointers, Stack |
291 |
53.85 |
1962 |
Remove Stones to Minimize the Total |
Medium |
Array, Heap_Priority_Queue |
888 |
68.42 |
1961 |
Check If String Is a Prefix of Array |
Easy |
Array, String |
162 |
100.00 |
1960 |
Maximum Product of the Length of Two Palindromic Substrings |
Hard |
String, Hash_Function, Rolling_Hash |
247 |
100.00 |
1959 |
Minimum Total Space Wasted With K Resizing Operations |
Medium |
Array, Dynamic_Programming |
225 |
100.00 |
1958 |
Check if Move is Legal |
Medium |
Array, Matrix, Enumeration |
169 |
100.00 |
1957 |
Delete Characters to Make Fancy String |
Easy |
String |
377 |
50.00 |
1955 |
Count Number of Special Subsequences |
Hard |
Array, Dynamic_Programming |
620 |
100.00 |
1954 |
Minimum Garden Perimeter to Collect Enough Apples |
Medium |
Math, Binary_Search |
132 |
100.00 |
1953 |
Maximum Number of Weeks for Which You Can Work |
Medium |
Array, Greedy |
461 |
100.00 |
1952 |
Three Divisors |
Easy |
Math |
141 |
33.33 |
1948 |
Delete Duplicate Folders in System |
Hard |
Array, String, Hash_Table, Trie, Hash_Function |
1420 |
100.00 |
1947 |
Maximum Compatibility Score Sum |
Medium |
Array, Dynamic_Programming, Bit_Manipulation, Backtracking, Bitmask |
179 |
100.00 |
1946 |
Largest Number After Mutating Substring |
Medium |
Array, String, Greedy |
346 |
100.00 |
1945 |
Sum of Digits of String After Convert |
Easy |
String, Simulation |
146 |
75.00 |
1944 |
Number of Visible People in a Queue |
Hard |
Array, Stack, Monotonic_Stack |
605 |
90.00 |
1943 |
Describe the Painting |
Medium |
Array, Prefix_Sum |
951 |
100.00 |
1942 |
The Number of the Smallest Unoccupied Chair |
Medium |
Array, Heap_Priority_Queue, Ordered_Set |
549 |
100.00 |
1941 |
Check if All Characters Have Equal Number of Occurrences |
Easy |
String, Hash_Table, Counting |
167 |
78.57 |
1938 |
Maximum Genetic Difference Query |
Hard |
Array, Bit_Manipulation, Trie |
855 |
100.00 |
1937 |
Maximum Number of Points with Cost |
Medium |
Array, Dynamic_Programming |
886 |
100.00 |
1936 |
Add Minimum Number of Rungs |
Medium |
Array, Greedy |
405 |
100.00 |
1935 |
Maximum Number of Words You Can Type |
Easy |
String, Hash_Table |
178 |
37.50 |
1934 |
Confirmation Rate |
Medium |
Database |
1602 |
35.78 |
1932 |
Merge BSTs to Create Single BST |
Hard |
Hash_Table, Depth_First_Search, Tree, Binary_Search, Binary_Tree |
1146 |
100.00 |
1931 |
Painting a Grid With Three Different Colors |
Hard |
Dynamic_Programming |
135 |
100.00 |
1930 |
Unique Length-3 Palindromic Subsequences |
Medium |
String, Hash_Table, Prefix_Sum |
273 |
100.00 |
1929 |
Concatenation of Array |
Easy |
Array |
220 |
94.47 |
1928 |
Minimum Cost to Reach Destination in Time |
Hard |
Dynamic_Programming, Graph |
414 |
100.00 |
1927 |
Sum Game |
Medium |
Math, Greedy, Game_Theory |
211 |
100.00 |
1926 |
Nearest Exit from Entrance in Maze |
Medium |
Array, Breadth_First_Search, Matrix, Graph_Theory_I_Day_6_Matrix_Related_Problems |
351 |
94.44 |
1925 |
Count Square Sum Triples |
Easy |
Math, Enumeration |
161 |
40.00 |
1923 |
Longest Common Subpath |
Hard |
Array, Binary_Search, Hash_Function, Rolling_Hash, Suffix_Array |
1142 |
100.00 |
1922 |
Count Good Numbers |
Medium |
Math, Recursion |
135 |
100.00 |
1921 |
Eliminate Maximum Number of Monsters |
Medium |
Array, Sorting, Greedy |
507 |
100.00 |
1920 |
Build Array from Permutation |
Easy |
Array, Simulation |
252 |
81.25 |
1916 |
Count Ways to Build Rooms in an Ant Colony |
Hard |
Dynamic_Programming, Math, Tree, Graph, Topological_Sort, Combinatorics |
2564 |
100.00 |
1915 |
Number of Wonderful Substrings |
Medium |
String, Hash_Table, Bit_Manipulation, Prefix_Sum |
267 |
100.00 |
1914 |
Cyclically Rotating a Grid |
Medium |
Array, Matrix, Simulation |
282 |
100.00 |
1913 |
Maximum Product Difference Between Two Pairs |
Easy |
Array, Sorting |
261 |
100.00 |
1912 |
Design Movie Rental System |
Hard |
Array, Hash_Table, Design, Heap_Priority_Queue, Ordered_Set |
3005 |
100.00 |
1911 |
Maximum Alternating Subsequence Sum |
Medium |
Array, Dynamic_Programming |
531 |
100.00 |
1910 |
Remove All Occurrences of a Substring |
Medium |
String |
177 |
100.00 |
1909 |
Remove One Element to Make the Array Strictly Increasing |
Easy |
Array |
176 |
50.00 |
1907 |
Count Salary Categories |
Medium |
Database |
2283 |
89.29 |
1906 |
Minimum Absolute Difference Queries |
Medium |
Array, Hash_Table |
1069 |
50.00 |
1905 |
Count Sub Islands |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Graph_Theory_I_Day_3_Matrix_Related_Problems |
866 |
100.00 |
1904 |
The Number of Full Rounds You Have Played |
Medium |
String, Math |
149 |
100.00 |
1903 |
Largest Odd Number in String |
Easy |
String, Math, Greedy |
256 |
75.00 |
1901 |
Find a Peak Element II |
Medium |
Array, Binary_Search, Matrix, Divide_and_Conquer, Binary_Search_II_Day_17 |
726 |
100.00 |
1900 |
The Earliest and Latest Rounds Where Players Compete |
Hard |
Dynamic_Programming, Memoization |
142 |
100.00 |
1899 |
Merge Triplets to Form Target Triplet |
Medium |
Array, Greedy |
954 |
71.43 |
1898 |
Maximum Number of Removable Characters |
Medium |
Array, String, Binary_Search, Binary_Search_II_Day_6 |
636 |
100.00 |
1897 |
Redistribute Characters to Make All Strings Equal |
Easy |
String, Hash_Table, Counting |
179 |
100.00 |
1896 |
Minimum Cost to Change the Final Value of Expression |
Hard |
String, Dynamic_Programming, Math, Stack |
252 |
100.00 |
1895 |
Largest Magic Square |
Medium |
Array, Matrix, Prefix_Sum |
202 |
100.00 |
1894 |
Find the Student that Will Replace the Chalk |
Medium |
Array, Binary_Search, Simulation, Prefix_Sum, Binary_Search_II_Day_2 |
520 |
50.00 |
1893 |
Check if All the Integers in a Range Are Covered |
Easy |
Array, Hash_Table, Prefix_Sum |
140 |
100.00 |
1890 |
The Latest Login in 2020 |
Easy |
Database, SQL_I_Day_8_Function |
1280 |
43.62 |
1889 |
Minimum Space Wasted From Packaging |
Hard |
Array, Sorting, Binary_Search, Prefix_Sum |
910 |
100.00 |
1888 |
Minimum Number of Flips to Make the Binary String Alternating |
Medium |
String, Greedy |
259 |
87.50 |
1887 |
Reduction Operations to Make the Array Elements Equal |
Medium |
Array, Sorting |
457 |
100.00 |
1886 |
Determine Whether Matrix Can Be Obtained By Rotation |
Easy |
Array, Matrix, Programming_Skills_II_Day_7 |
147 |
85.71 |
1884 |
Egg Drop With 2 Eggs and N Floors |
Medium |
Dynamic_Programming, Math |
130 |
100.00 |
1883 |
Minimum Skips to Arrive at Meeting On Time |
Hard |
Array, Dynamic_Programming |
278 |
100.00 |
1882 |
Process Tasks Using Servers |
Medium |
Array, Heap_Priority_Queue |
1085 |
100.00 |
1881 |
Maximum Value after Insertion |
Medium |
String, Greedy |
362 |
100.00 |
1880 |
Check if Word Equals Summation of Two Words |
Easy |
String |
139 |
80.00 |
1879 |
Minimum XOR Sum of Two Arrays |
Hard |
Array, Dynamic_Programming, Bit_Manipulation, Bitmask |
173 |
100.00 |
1878 |
Get Biggest Three Rhombus Sums in a Grid |
Medium |
Array, Math, Sorting, Matrix, Heap_Priority_Queue, Prefix_Sum |
326 |
100.00 |
1877 |
Minimize Maximum Pair Sum in Array |
Medium |
Array, Sorting, Greedy, Two_Pointers |
668 |
50.00 |
1876 |
Substrings of Size Three with Distinct Characters |
Easy |
String, Hash_Table, Counting, Sliding_Window |
144 |
91.67 |
1873 |
Calculate Special Bonus |
Easy |
Database, SQL_I_Day_2_Select_and_Order |
1321 |
33.12 |
1872 |
Stone Game VIII |
Hard |
Array, Dynamic_Programming, Math, Prefix_Sum, Game_Theory |
569 |
100.00 |
1871 |
Jump Game VII |
Medium |
String, Two_Pointers, Prefix_Sum |
247 |
100.00 |
1870 |
Minimum Speed to Arrive on Time |
Medium |
Array, Binary_Search, Binary_Search_II_Day_6 |
628 |
50.00 |
1869 |
Longer Contiguous Segments of Ones than Zeros |
Easy |
String |
118 |
100.00 |
1866 |
Number of Ways to Rearrange Sticks With K Sticks Visible |
Hard |
Dynamic_Programming, Math, Combinatorics |
188 |
100.00 |
1865 |
Finding Pairs With a Certain Sum |
Medium |
Array, Hash_Table, Design |
1050 |
100.00 |
1864 |
Minimum Number of Swaps to Make the Binary String Alternating |
Medium |
String, Greedy |
140 |
100.00 |
1863 |
Sum of All Subset XOR Totals |
Easy |
Array, Math, Bit_Manipulation, Backtracking, Combinatorics |
128 |
80.00 |
1862 |
Sum of Floored Pairs |
Hard |
Array, Math, Binary_Search, Prefix_Sum |
710 |
100.00 |
1861 |
Rotating the Box |
Medium |
Array, Matrix, Two_Pointers |
882 |
60.00 |
1860 |
Incremental Memory Leak |
Medium |
Simulation |
161 |
100.00 |
1859 |
Sorting the Sentence |
Easy |
String, Sorting |
155 |
89.29 |
1857 |
Largest Color Value in a Directed Graph |
Hard |
Hash_Table, Dynamic_Programming, Graph, Counting, Memoization, Topological_Sort |
1005 |
60.00 |
1856 |
Maximum Subarray Min-Product |
Medium |
Array, Stack, Prefix_Sum, Monotonic_Stack |
517 |
66.67 |
1855 |
Maximum Distance Between a Pair of Values |
Medium |
Array, Greedy, Binary_Search, Two_Pointers, Binary_Search_I_Day_11 |
458 |
100.00 |
1854 |
Maximum Population Year |
Easy |
Array, Counting |
148 |
90.00 |
1851 |
Minimum Interval to Include Each Query |
Hard |
Array, Sorting, Binary_Search, Heap_Priority_Queue, Line_Sweep |
1612 |
87.50 |
1850 |
Minimum Adjacent Swaps to Reach the Kth Smallest Number |
Medium |
String, Greedy, Two_Pointers |
193 |
100.00 |
1849 |
Splitting a String Into Descending Consecutive Values |
Medium |
String, Backtracking |
136 |
100.00 |
1848 |
Minimum Distance to the Target Element |
Easy |
Array |
172 |
80.00 |
1847 |
Closest Room |
Hard |
Array, Sorting, Binary_Search |
1179 |
100.00 |
1846 |
Maximum Element After Decreasing and Rearranging |
Medium |
Array, Sorting, Greedy |
412 |
100.00 |
1845 |
Seat Reservation Manager |
Medium |
Design, Heap_Priority_Queue, Programming_Skills_II_Day_17 |
834 |
100.00 |
1844 |
Replace All Digits with Characters |
Easy |
String |
137 |
100.00 |
1840 |
Maximum Building Height |
Hard |
Array, Math |
1210 |
100.00 |
1839 |
Longest Substring Of All Vowels in Order |
Medium |
String, Sliding_Window |
290 |
80.00 |
1838 |
Frequency of the Most Frequent Element |
Medium |
Array, Sorting, Greedy, Binary_Search, Prefix_Sum, Sliding_Window, Binary_Search_II_Day_9 |
564 |
88.89 |
1837 |
Sum of Digits in Base K |
Easy |
Math |
120 |
100.00 |
1835 |
Find XOR Sum of All Pairs Bitwise AND |
Hard |
Array, Math, Bit_Manipulation |
604 |
100.00 |
1834 |
Single-Threaded CPU |
Medium |
Array, Sorting, Heap_Priority_Queue |
1050 |
100.00 |
1833 |
Maximum Ice Cream Bars |
Medium |
Array, Sorting, Greedy |
439 |
100.00 |
1832 |
Check if the Sentence Is Pangram |
Easy |
String, Hash_Table |
127 |
98.00 |
1830 |
Minimum Number of Operations to Make String Sorted |
Hard |
String, Math, Combinatorics |
226 |
100.00 |
1829 |
Maximum XOR for Each Query |
Medium |
Array, Bit_Manipulation, Prefix_Sum |
680 |
100.00 |
1828 |
Queries on Number of Points Inside a Circle |
Medium |
Array, Math, Geometry |
284 |
100.00 |
1827 |
Minimum Operations to Make the Array Increasing |
Easy |
Array, Greedy |
208 |
100.00 |
1825 |
Finding MK Average |
Hard |
Design, Heap_Priority_Queue, Ordered_Set, Queue |
1101 |
100.00 |
1824 |
Minimum Sideway Jumps |
Medium |
Array, Dynamic_Programming, Greedy |
726 |
100.00 |
1823 |
Find the Winner of the Circular Game |
Medium |
Array, Math, Simulation, Recursion, Queue, Data_Structure_II_Day_14_Stack_Queue |
119 |
87.50 |
1822 |
Sign of the Product of an Array |
Easy |
Array, Math, Programming_Skills_I_Day_4_Loop |
170 |
92.51 |
1819 |
Number of Different Subsequences GCDs |
Hard |
Array, Math, Counting, Number_Theory |
624 |
100.00 |
1818 |
Minimum Absolute Sum Difference |
Medium |
Array, Sorting, Binary_Search, Ordered_Set, Binary_Search_II_Day_7 |
447 |
100.00 |
1817 |
Finding the Users Active Minutes |
Medium |
Array, Hash_Table |
652 |
100.00 |
1816 |
Truncate Sentence |
Easy |
Array, String |
147 |
94.74 |
1815 |
Maximum Number of Groups Getting Fresh Donuts |
Hard |
Array, Dynamic_Programming, Bit_Manipulation, Bitmask, Memoization |
1073 |
100.00 |
1814 |
Count Nice Pairs in an Array |
Medium |
Array, Hash_Table, Math, Counting |
520 |
100.00 |
1813 |
Sentence Similarity III |
Medium |
Array, String, Two_Pointers |
162 |
100.00 |
1812 |
Determine Color of a Chessboard Square |
Easy |
String, Math |
127 |
92.86 |
1808 |
Maximize Number of Nice Divisors |
Hard |
Math, Recursion |
135 |
100.00 |
1807 |
Evaluate the Bracket Pairs of a String |
Medium |
Array, String, Hash_Table |
689 |
100.00 |
1806 |
Minimum Number of Operations to Reinitialize a Permutation |
Medium |
Array, Math, Simulation |
117 |
100.00 |
1805 |
Number of Different Integers in a String |
Easy |
String, Hash_Table |
162 |
100.00 |
1803 |
Count Pairs With XOR in a Range |
Hard |
Array, Bit_Manipulation, Trie |
427 |
100.00 |
1802 |
Maximum Value at a Given Index in a Bounded Array |
Medium |
Greedy, Binary_Search, Binary_Search_II_Day_17 |
118 |
100.00 |
1801 |
Number of Orders in the Backlog |
Medium |
Array, Heap_Priority_Queue, Simulation |
668 |
100.00 |
1800 |
Maximum Ascending Subarray Sum |
Easy |
Array |
139 |
100.00 |
1799 |
Maximize Score After N Operations |
Hard |
Array, Dynamic_Programming, Math, Bit_Manipulation, Backtracking, Bitmask, Number_Theory |
347 |
73.17 |
1798 |
Maximum Number of Consecutive Values You Can Make |
Medium |
Array, Greedy |
414 |
100.00 |
1797 |
Design Authentication Manager |
Medium |
Hash_Table, Design, Programming_Skills_II_Day_19 |
334 |
100.00 |
1796 |
Second Largest Digit in a String |
Easy |
String, Hash_Table |
148 |
100.00 |
1795 |
Rearrange Products Table |
Easy |
Database, SQL_I_Day_4_Union_and_Select |
1027 |
67.57 |
1793 |
Maximum Score of a Good Subarray |
Hard |
Array, Binary_Search, Two_Pointers, Stack, Monotonic_Stack |
568 |
100.00 |
1792 |
Maximum Average Pass Ratio |
Medium |
Array, Greedy, Heap_Priority_Queue |
1111 |
75.00 |
1791 |
Find Center of Star Graph |
Easy |
Graph |
476 |
91.67 |
1790 |
Check if One String Swap Can Make Strings Equal |
Easy |
String, Hash_Table, Counting, Programming_Skills_I_Day_4_Loop |
138 |
100.00 |
1789 |
Primary Department for Each Employee |
Easy |
Database |
1122 |
74.47 |
1787 |
Make the XOR of All Segments Equal to Zero |
Hard |
Array, Dynamic_Programming, Bit_Manipulation |
374 |
100.00 |
1786 |
Number of Restricted Paths From First to Last Node |
Medium |
Dynamic_Programming, Heap_Priority_Queue, Graph, Topological_Sort, Shortest_Path |
977 |
100.00 |
1785 |
Minimum Elements to Add to Form a Given Sum |
Medium |
Array, Greedy |
595 |
100.00 |
1784 |
Check if Binary String Has at Most One Segment of Ones |
Easy |
String |
135 |
85.71 |
1782 |
Count Pairs Of Nodes |
Hard |
Binary_Search, Two_Pointers, Graph |
1441 |
100.00 |
1781 |
Sum of Beauty of All Substrings |
Medium |
String, Hash_Table, Counting |
172 |
100.00 |
1780 |
Check if Number is a Sum of Powers of Three |
Medium |
Math |
133 |
66.67 |
1779 |
Find Nearest Point That Has the Same X or Y Coordinate |
Easy |
Array, Programming_Skills_I_Day_3_Conditional_Statements |
364 |
100.00 |
1776 |
Car Fleet II |
Hard |
Array, Math, Stack, Heap_Priority_Queue, Monotonic_Stack |
2049 |
100.00 |
1775 |
Equal Sum Arrays With Minimum Number of Operations |
Medium |
Array, Hash_Table, Greedy, Counting |
529 |
100.00 |
1774 |
Closest Dessert Cost |
Medium |
Array, Dynamic_Programming, Backtracking |
147 |
100.00 |
1773 |
Count Items Matching a Rule |
Easy |
Array, String |
227 |
97.50 |
1771 |
Maximize Palindrome Length From Subsequences |
Hard |
String, Dynamic_Programming |
248 |
100.00 |
1770 |
Maximum Score from Performing Multiplication Operations |
Hard |
Array, Dynamic_Programming |
436 |
91.67 |
1769 |
Minimum Number of Operations to Move All Balls to Each Box |
Medium |
Array, String |
217 |
75.00 |
1768 |
Merge Strings Alternately |
Easy |
String, Two_Pointers, Programming_Skills_I_Day_8_String |
138 |
93.81 |
1766 |
Tree of Coprimes |
Hard |
Math, Depth_First_Search, Breadth_First_Search, Tree |
991 |
100.00 |
1765 |
Map of Highest Peak |
Medium |
Array, Breadth_First_Search, Matrix |
1087 |
100.00 |
1764 |
Form Array by Concatenating Subarrays of Another Array |
Medium |
Array, Greedy, String_Matching |
206 |
100.00 |
1763 |
Longest Nice Substring |
Easy |
String, Hash_Table, Bit_Manipulation, Sliding_Window |
158 |
91.67 |
1761 |
Minimum Degree of a Connected Trio in a Graph |
Hard |
Graph |
590 |
50.00 |
1760 |
Minimum Limit of Balls in a Bag |
Medium |
Array, Binary_Search, Binary_Search_II_Day_3 |
460 |
100.00 |
1759 |
Count Number of Homogenous Substrings |
Medium |
String, Math |
230 |
100.00 |
1758 |
Minimum Changes To Make Alternating Binary String |
Easy |
String |
153 |
100.00 |
1757 |
Recyclable and Low Fat Products |
Easy |
Database, SQL_I_Day_1_Select |
1237 |
34.20 |
1755 |
Closest Subsequence Sum |
Hard |
Array, Dynamic_Programming, Two_Pointers, Bit_Manipulation, Bitmask |
620 |
100.00 |
1754 |
Largest Merge Of Two Strings |
Medium |
String, Greedy, Two_Pointers |
217 |
100.00 |
1753 |
Maximum Score From Removing Stones |
Medium |
Math, Greedy, Heap_Priority_Queue |
141 |
100.00 |
1752 |
Check if Array Is Sorted and Rotated |
Easy |
Array |
133 |
85.71 |
1751 |
Maximum Number of Events That Can Be Attended II |
Hard |
Array, Dynamic_Programming, Binary_Search |
608 |
100.00 |
1750 |
Minimum Length of String After Deleting Similar Ends |
Medium |
String, Two_Pointers |
215 |
100.00 |
1749 |
Maximum Absolute Sum of Any Subarray |
Medium |
Array, Dynamic_Programming |
367 |
100.00 |
1748 |
Sum of Unique Elements |
Easy |
Array, Hash_Table, Counting |
143 |
82.35 |
1745 |
Palindrome Partitioning IV |
Hard |
String, Dynamic_Programming |
179 |
100.00 |
1744 |
Can You Eat Your Favorite Candy on Your Favorite Day? |
Medium |
Array, Prefix_Sum |
809 |
100.00 |
1743 |
Restore the Array From Adjacent Pairs |
Medium |
Array, Hash_Table |
1018 |
100.00 |
1742 |
Maximum Number of Balls in a Box |
Easy |
Hash_Table, Math, Counting |
125 |
100.00 |
1741 |
Find Total Time Spent by Each Employee |
Easy |
Database, SQL_I_Day_8_Function |
1101 |
51.40 |
1739 |
Building Boxes |
Hard |
Math, Greedy, Binary_Search |
133 |
100.00 |
1738 |
Find Kth Largest XOR Coordinate Value |
Medium |
Array, Matrix, Bit_Manipulation, Heap_Priority_Queue, Prefix_Sum, Divide_and_Conquer, Quickselect |
936 |
100.00 |
1737 |
Change Minimum Characters to Satisfy One of Three Conditions |
Medium |
String, Hash_Table, Prefix_Sum, Counting |
240 |
100.00 |
1736 |
Latest Time by Replacing Hidden Digits |
Easy |
String, Greedy |
161 |
100.00 |
1735 |
Count Ways to Make Array With Product |
Hard |
Array, Dynamic_Programming, Math |
394 |
100.00 |
1734 |
Decode XORed Permutation |
Medium |
Array, Bit_Manipulation |
684 |
100.00 |
1733 |
Minimum Number of People to Teach |
Medium |
Array, Greedy |
580 |
100.00 |
1732 |
Find the Highest Altitude |
Easy |
Array, Prefix_Sum |
139 |
90.70 |
1731 |
The Number of Employees Which Report to Each Employee |
Easy |
Database |
1385 |
39.02 |
1729 |
Find Followers Count |
Easy |
Database, SQL_I_Day_7_Function |
1228 |
38.04 |
1728 |
Cat and Mouse II |
Hard |
Array, Dynamic_Programming, Math, Matrix, Graph, Memoization, Topological_Sort, Game_Theory |
193 |
100.00 |
1727 |
Largest Submatrix With Rearrangements |
Medium |
Array, Sorting, Greedy, Matrix |
650 |
100.00 |
1726 |
Tuple with Same Product |
Medium |
Array, Hash_Table |
762 |
100.00 |
1725 |
Number Of Rectangles That Can Form The Largest Square |
Easy |
Array |
244 |
100.00 |
1723 |
Find Minimum Time to Finish All Jobs |
Hard |
Array, Dynamic_Programming, Bit_Manipulation, Backtracking, Bitmask |
167 |
100.00 |
1722 |
Minimize Hamming Distance After Swap Operations |
Medium |
Array, Depth_First_Search, Union_Find |
843 |
100.00 |
1721 |
Swapping Nodes in a Linked List |
Medium |
Two_Pointers, Linked_List |
726 |
91.30 |
1720 |
Decode XORed Array |
Easy |
Array, Bit_Manipulation |
304 |
95.00 |
1719 |
Number Of Ways To Reconstruct A Tree |
Hard |
Tree, Graph, Topological_Sort |
1015 |
100.00 |
1718 |
Construct the Lexicographically Largest Valid Sequence |
Medium |
Array, Backtracking |
140 |
100.00 |
1717 |
Maximum Score From Removing Substrings |
Medium |
String, Greedy, Stack |
265 |
100.00 |
1716 |
Calculate Money in Leetcode Bank |
Easy |
Math |
119 |
66.67 |
1713 |
Minimum Operations to Make a Subsequence |
Hard |
Array, Hash_Table, Greedy, Binary_Search |
862 |
100.00 |
1712 |
Ways to Split Array Into Three Subarrays |
Medium |
Array, Binary_Search, Two_Pointers, Prefix_Sum, Binary_Search_II_Day_10 |
486 |
100.00 |
1711 |
Count Good Meals |
Medium |
Array, Hash_Table |
549 |
100.00 |
1710 |
Maximum Units on a Truck |
Easy |
Array, Sorting, Greedy |
228 |
100.00 |
1707 |
Maximum XOR With an Element From Array |
Hard |
Array, Bit_Manipulation, Trie |
1295 |
100.00 |
1706 |
Where Will the Ball Fall |
Medium |
Array, Dynamic_Programming, Depth_First_Search, Matrix, Simulation, Level_2_Day_1_Implementation/Simulation |
270 |
67.86 |
1705 |
Maximum Number of Eaten Apples |
Medium |
Array, Greedy, Heap_Priority_Queue |
428 |
100.00 |
1704 |
Determine if String Halves Are Alike |
Easy |
String, Counting |
162 |
83.33 |
1703 |
Minimum Adjacent Swaps for K Consecutive Ones |
Hard |
Array, Greedy, Prefix_Sum, Sliding_Window |
518 |
100.00 |
1702 |
Maximum Binary String After Change |
Medium |
String, Greedy |
343 |
100.00 |
1701 |
Average Waiting Time |
Medium |
Array, Simulation |
654 |
100.00 |
1700 |
Number of Students Unable to Eat Lunch |
Easy |
Array, Stack, Simulation, Queue |
143 |
100.00 |
1697 |
Checking Existence of Edge Length Limited Paths |
Hard |
Array, Sorting, Graph, Union_Find |
1411 |
72.90 |
1696 |
Jump Game VI |
Medium |
Array, Dynamic_Programming, Heap_Priority_Queue, Sliding_Window, Queue, Monotonic_Queue |
497 |
100.00 |
1695 |
Maximum Erasure Value |
Medium |
Array, Hash_Table, Sliding_Window |
478 |
100.00 |
1694 |
Reformat Phone Number |
Easy |
String |
142 |
100.00 |
1693 |
Daily Leads and Partners |
Easy |
Database, SQL_I_Day_7_Function |
1115 |
52.84 |
1691 |
Maximum Height by Stacking Cuboids |
Hard |
Array, Dynamic_Programming, Sorting |
187 |
100.00 |
1690 |
Stone Game VII |
Medium |
Array, Dynamic_Programming, Math, Game_Theory |
196 |
100.00 |
1689 |
Partitioning Into Minimum Number Of Deci-Binary Numbers |
Medium |
String, Greedy |
226 |
84.44 |
1688 |
Count of Matches in Tournament |
Easy |
Math, Simulation |
124 |
83.33 |
1687 |
Delivering Boxes from Storage to Ports |
Hard |
Array, Dynamic_Programming, Heap_Priority_Queue, Queue, Segment_Tree, Monotonic_Queue |
778 |
100.00 |
1686 |
Stone Game VI |
Medium |
Array, Math, Sorting, Greedy, Heap_Priority_Queue, Game_Theory |
702 |
100.00 |
1685 |
Sum of Absolute Differences in a Sorted Array |
Medium |
Array, Math, Prefix_Sum |
612 |
100.00 |
1684 |
Count the Number of Consistent Strings |
Easy |
Array, String, Hash_Table, Bit_Manipulation |
234 |
100.00 |
1683 |
Invalid Tweets |
Easy |
Database |
1263 |
53.93 |
1681 |
Minimum Incompatibility |
Hard |
Array, Dynamic_Programming, Bit_Manipulation, Bitmask |
162 |
100.00 |
1680 |
Concatenation of Consecutive Binary Numbers |
Medium |
Math, Bit_Manipulation, Simulation |
175 |
100.00 |
1679 |
Max Number of K-Sum Pairs |
Medium |
Array, Hash_Table, Sorting, Two_Pointers |
468 |
92.86 |
1678 |
Goal Parser Interpretation |
Easy |
String, Programming_Skills_I_Day_8_String |
136 |
88.24 |
1675 |
Minimize Deviation in Array |
Hard |
Array, Greedy, Heap_Priority_Queue, Ordered_Set |
769 |
100.00 |
1674 |
Minimum Moves to Make Array Complementary |
Medium |
Array, Hash_Table, Prefix_Sum |
522 |
100.00 |
1673 |
Find the Most Competitive Subsequence |
Medium |
Array, Greedy, Stack, Monotonic_Stack |
741 |
100.00 |
1672 |
Richest Customer Wealth |
Easy |
Array, Matrix, Programming_Skills_I_Day_6_Array |
155 |
94.54 |
1671 |
Minimum Number of Removals to Make Mountain Array |
Hard |
Array, Dynamic_Programming, Greedy, Binary_Search |
264 |
100.00 |
1670 |
Design Front Middle Back Queue |
Medium |
Array, Design, Linked_List, Queue, Data_Stream |
267 |
100.00 |
1669 |
Merge In Between Linked Lists |
Medium |
Linked_List |
531 |
66.67 |
1668 |
Maximum Repeating Substring |
Easy |
String, String_Matching |
170 |
100.00 |
1667 |
Fix Names in a Table |
Easy |
Database, SQL_I_Day_3_String_Processing_Functions |
1196 |
61.40 |
1665 |
Minimum Initial Energy to Finish Tasks |
Hard |
Array, Sorting, Greedy |
823 |
100.00 |
1664 |
Ways to Make a Fair Array |
Medium |
Array, Dynamic_Programming |
475 |
100.00 |
1663 |
Smallest String With A Given Numeric Value |
Medium |
String, Greedy |
202 |
100.00 |
1662 |
Check If Two String Arrays are Equivalent |
Easy |
Array, String |
144 |
86.84 |
1661 |
Average Time of Process per Machine |
Easy |
Database |
429 |
71.35 |
1659 |
Maximize Grid Happiness |
Hard |
Dynamic_Programming, Bit_Manipulation, Bitmask, Memoization |
181 |
100.00 |
1658 |
Minimum Operations to Reduce X to Zero |
Medium |
Array, Hash_Table, Binary_Search, Prefix_Sum, Sliding_Window |
532 |
50.00 |
1657 |
Determine if Two Strings Are Close |
Medium |
String, Hash_Table, Sorting |
287 |
100.00 |
1656 |
Design an Ordered Stream |
Easy |
Array, Hash_Table, Design, Data_Stream |
487 |
91.67 |
1655 |
Distribute Repeating Integers |
Hard |
Array, Dynamic_Programming, Bit_Manipulation, Backtracking, Bitmask |
445 |
100.00 |
1654 |
Minimum Jumps to Reach Home |
Medium |
Array, Dynamic_Programming, Breadth_First_Search, Graph_Theory_I_Day_11_Breadth_First_Search |
192 |
100.00 |
1653 |
Minimum Deletions to Make String Balanced |
Medium |
String, Dynamic_Programming, Stack |
291 |
100.00 |
1652 |
Defuse the Bomb |
Easy |
Array |
160 |
100.00 |
1649 |
Create Sorted Array through Instructions |
Hard |
Array, Binary_Search, Ordered_Set, Divide_and_Conquer, Segment_Tree, Binary_Indexed_Tree, Merge_Sort |
571 |
100.00 |
1648 |
Sell Diminishing-Valued Colored Balls |
Medium |
Array, Math, Sorting, Greedy, Binary_Search, Heap_Priority_Queue, Binary_Search_II_Day_19 |
509 |
100.00 |
1647 |
Minimum Deletions to Make Character Frequencies Unique |
Medium |
String, Sorting, Greedy |
252 |
100.00 |
1646 |
Get Maximum in Generated Array |
Easy |
Array, Dynamic_Programming, Simulation |
142 |
100.00 |
1643 |
Kth Smallest Instructions |
Hard |
Array, Dynamic_Programming, Math, Combinatorics |
171 |
100.00 |
1642 |
Furthest Building You Can Reach |
Medium |
Array, Greedy, Heap_Priority_Queue |
457 |
71.43 |
1641 |
Count Sorted Vowel Strings |
Medium |
Dynamic_Programming |
141 |
42.86 |
1640 |
Check Array Formation Through Concatenation |
Easy |
Array, Hash_Table |
154 |
100.00 |
1639 |
Number of Ways to Form a Target String Given a Dictionary |
Hard |
Array, String, Dynamic_Programming |
408 |
100.00 |
1638 |
Count Substrings That Differ by One Character |
Medium |
String, Hash_Table, Dynamic_Programming |
143 |
100.00 |
1637 |
Widest Vertical Area Between Two Points Containing No Points |
Easy |
Array, Sorting |
616 |
100.00 |
1636 |
Sort Array by Increasing Frequency |
Easy |
Array, Hash_Table, Sorting |
222 |
95.65 |
1633 |
Percentage of Users Attended a Contest |
Easy |
Database |
1556 |
93.74 |
1632 |
Rank Transform of a Matrix |
Hard |
Array, Greedy, Matrix, Graph, Union_Find, Topological_Sort |
807 |
100.00 |
1631 |
Path With Minimum Effort |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Binary_Search, Matrix, Heap_Priority_Queue, Union_Find |
384 |
100.00 |
1630 |
Arithmetic Subarrays |
Medium |
Array, Sorting, Programming_Skills_II_Day_9 |
264 |
100.00 |
1629 |
Slowest Key |
Easy |
Array, String |
200 |
75.00 |
1627 |
Graph Connectivity With Threshold |
Hard |
Array, Math, Union_Find |
703 |
100.00 |
1626 |
Best Team With No Conflicts |
Medium |
Array, Dynamic_Programming, Sorting |
370 |
100.00 |
1625 |
Lexicographically Smallest String After Applying Operations |
Medium |
String, Breadth_First_Search |
415 |
100.00 |
1624 |
Largest Substring Between Two Equal Characters |
Easy |
String, Hash_Table |
132 |
100.00 |
1622 |
Fancy Sequence |
Hard |
Math, Design, Segment_Tree |
1050 |
100.00 |
1621 |
Number of Sets of K Non-Overlapping Line Segments |
Medium |
Dynamic_Programming, Math |
147 |
100.00 |
1620 |
Coordinate With Maximum Network Quality |
Medium |
Array, Enumeration |
233 |
100.00 |
1619 |
Mean of Array After Removing Some Elements |
Easy |
Array, Sorting |
178 |
100.00 |
1617 |
Count Subtrees With Max Distance Between Cities |
Hard |
Dynamic_Programming, Tree, Bit_Manipulation, Bitmask, Enumeration |
297 |
100.00 |
1616 |
Split Two Strings to Make Palindrome |
Medium |
String, Greedy, Two_Pointers |
277 |
100.00 |
1615 |
Maximal Network Rank |
Medium |
Graph, Graph_Theory_I_Day_14_Graph_Theory |
282 |
100.00 |
1614 |
Maximum Nesting Depth of the Parentheses |
Easy |
String, Stack |
130 |
81.25 |
1611 |
Minimum One Bit Operations to Make Integers Zero |
Hard |
Dynamic_Programming, Bit_Manipulation, Memoization |
127 |
100.00 |
1610 |
Maximum Number of Visible Points |
Hard |
Array, Math, Sorting, Sliding_Window, Geometry |
1343 |
100.00 |
1609 |
Even Odd Tree |
Medium |
Breadth_First_Search, Tree, Binary_Tree |
497 |
100.00 |
1608 |
Special Array With X Elements Greater Than or Equal X |
Easy |
Array, Sorting, Binary_Search, Binary_Search_I_Day_7 |
147 |
81.82 |
1606 |
Find Servers That Handled Most Number of Requests |
Hard |
Array, Greedy, Heap_Priority_Queue, Ordered_Set |
973 |
33.33 |
1605 |
Find Valid Matrix Given Row and Column Sums |
Medium |
Array, Greedy, Matrix |
574 |
100.00 |
1604 |
Alert Using Same Key-Card Three or More Times in a One Hour Period |
Medium |
Array, String, Hash_Table, Sorting |
704 |
83.33 |
1603 |
Design Parking System |
Easy |
Design, Simulation, Counting, Programming_Skills_I_Day_12_Class_and_Object |
376 |
31.83 |
1601 |
Maximum Number of Achievable Transfer Requests |
Hard |
Array, Bit_Manipulation, Backtracking, Enumeration |
206 |
100.00 |
1600 |
Throne Inheritance |
Medium |
Hash_Table, Depth_First_Search, Tree, Design |
1847 |
100.00 |
1599 |
Maximum Profit of Operating a Centennial Wheel |
Medium |
Array, Simulation |
593 |
100.00 |
1598 |
Crawler Log Folder |
Easy |
Array, String, Stack |
150 |
92.31 |
1595 |
Minimum Cost to Connect Two Groups of Points |
Hard |
Array, Dynamic_Programming, Matrix, Bit_Manipulation, Bitmask |
278 |
100.00 |
1594 |
Maximum Non Negative Product in a Matrix |
Medium |
Array, Dynamic_Programming, Matrix |
224 |
100.00 |
1593 |
Split a String Into the Max Number of Unique Substrings |
Medium |
String, Hash_Table, Backtracking |
161 |
100.00 |
1592 |
Rearrange Spaces Between Words |
Easy |
String |
182 |
75.00 |
1591 |
Strange Printer II |
Hard |
Array, Matrix, Graph, Topological_Sort |
321 |
100.00 |
1590 |
Make Sum Divisible by P |
Medium |
Array, Hash_Table, Prefix_Sum |
464 |
100.00 |
1589 |
Maximum Sum Obtained of Any Permutation |
Medium |
Array, Sorting, Greedy, Prefix_Sum |
867 |
66.67 |
1588 |
Sum of All Odd Length Subarrays |
Easy |
Array, Math, Prefix_Sum, Programming_Skills_I_Day_6_Array |
157 |
64.00 |
1587 |
Bank Account Summary II |
Easy |
Database, SQL_I_Day_10_Where |
1582 |
52.96 |
1585 |
Check If String Is Transformable With Substring Sort Operations |
Hard |
String, Sorting, Greedy |
271 |
100.00 |
1584 |
Min Cost to Connect All Points |
Medium |
Array, Union_Find, Minimum_Spanning_Tree |
331 |
95.12 |
1583 |
Count Unhappy Friends |
Medium |
Array, Simulation |
324 |
100.00 |
1582 |
Special Positions in a Binary Matrix |
Easy |
Array, Matrix |
212 |
60.00 |
1581 |
Customer Who Visited but Did Not Make Any Transactions |
Easy |
Database, SQL_I_Day_5_Union |
2771 |
54.68 |
1579 |
Remove Max Number of Edges to Keep Graph Fully Traversable |
Hard |
Graph, Union_Find |
942 |
32.52 |
1578 |
Minimum Time to Make Rope Colorful |
Medium |
Array, String, Dynamic_Programming, Greedy |
577 |
100.00 |
1577 |
Number of Ways Where Square of Number Is Equal to Product of Two Numbers |
Medium |
Array, Hash_Table, Math, Two_Pointers |
209 |
100.00 |
1576 |
Replace All ?’s to Avoid Consecutive Repeating Characters |
Easy |
String |
180 |
37.50 |
1575 |
Count All Possible Routes |
Hard |
Array, Dynamic_Programming, Memoization |
246 |
100.00 |
1574 |
Shortest Subarray to be Removed to Make Array Sorted |
Medium |
Array, Binary_Search, Two_Pointers, Stack, Monotonic_Stack, Binary_Search_II_Day_14 |
477 |
50.00 |
1573 |
Number of Ways to Split a String |
Medium |
String, Math |
247 |
100.00 |
1572 |
Matrix Diagonal Sum |
Easy |
Array, Matrix, Programming_Skills_I_Day_7_Array, Udemy_2D_Arrays/Matrix |
221 |
67.61 |
1569 |
Number of Ways to Reorder Array to Get Same BST |
Hard |
Array, Dynamic_Programming, Math, Tree, Binary_Tree, Union_Find, Binary_Search_Tree, Divide_and_Conquer, Memoization, Combinatorics |
256 |
100.00 |
1568 |
Minimum Number of Days to Disconnect Island |
Hard |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Strongly_Connected_Component |
210 |
100.00 |
1567 |
Maximum Length of Subarray With Positive Product |
Medium |
Array, Dynamic_Programming, Greedy, Dynamic_Programming_I_Day_6 |
468 |
33.33 |
1566 |
Detect Pattern of Length M Repeated K or More Times |
Easy |
Array, Enumeration |
168 |
33.33 |
1563 |
Stone Game V |
Hard |
Array, Dynamic_Programming, Math, Game_Theory |
371 |
100.00 |
1562 |
Find Latest Group of Size M |
Medium |
Array, Binary_Search, Simulation, Binary_Search_II_Day_19 |
534 |
100.00 |
1561 |
Maximum Number of Coins You Can Get |
Medium |
Array, Math, Sorting, Greedy, Game_Theory |
515 |
50.00 |
1560 |
Most Visited Sector in a Circular Track |
Easy |
Array, Simulation |
230 |
100.00 |
1559 |
Detect Cycles in 2D Grid |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find |
871 |
33.33 |
1558 |
Minimum Numbers of Function Calls to Make Target Array |
Medium |
Array, Greedy |
347 |
50.00 |
1557 |
Minimum Number of Vertices to Reach All Nodes |
Medium |
Graph, Data_Structure_II_Day_19_Graph, Graph_Theory_I_Day_13_Graph_Theory |
792 |
99.29 |
1556 |
Thousand Separator |
Easy |
String |
131 |
100.00 |
1553 |
Minimum Number of Days to Eat N Oranges |
Hard |
Dynamic_Programming, Memoization |
153 |
100.00 |
1552 |
Magnetic Force Between Two Balls |
Medium |
Array, Sorting, Binary_Search, Binary_Search_II_Day_4 |
636 |
100.00 |
1551 |
Minimum Operations to Make Array Equal |
Medium |
Math |
119 |
100.00 |
1550 |
Three Consecutive Odds |
Easy |
Array |
154 |
90.00 |
1547 |
Minimum Cost to Cut a Stick |
Hard |
Array, Dynamic_Programming |
187 |
92.00 |
1546 |
Maximum Number of Non-Overlapping Subarrays With Sum Equals Target |
Medium |
Array, Hash_Table, Greedy, Prefix_Sum |
560 |
100.00 |
1545 |
Find Kth Bit in Nth Binary String |
Medium |
String, Recursion |
141 |
100.00 |
1544 |
Make The String Great |
Easy |
String, Stack |
164 |
92.16 |
1542 |
Find Longest Awesome Substring |
Hard |
String, Hash_Table, Bit_Manipulation |
239 |
100.00 |
1541 |
Minimum Insertions to Balance a Parentheses String |
Medium |
String, Greedy, Stack |
240 |
80.00 |
1540 |
Can Convert String in K Moves |
Medium |
String, Hash_Table |
272 |
75.00 |
1539 |
Kth Missing Positive Number |
Easy |
Array, Binary_Search, Binary_Search_I_Day_6 |
153 |
100.00 |
1537 |
Get the Maximum Score |
Hard |
Array, Dynamic_Programming, Greedy, Two_Pointers |
453 |
100.00 |
1536 |
Minimum Swaps to Arrange a Binary Grid |
Medium |
Array, Greedy, Matrix |
336 |
100.00 |
1535 |
Find the Winner of an Array Game |
Medium |
Array, Simulation |
460 |
100.00 |
1534 |
Count Good Triplets |
Easy |
Array, Enumeration |
175 |
66.67 |
1531 |
String Compression II |
Hard |
String, Dynamic_Programming |
207 |
100.00 |
1530 |
Number of Good Leaf Nodes Pairs |
Medium |
Depth_First_Search, Tree, Binary_Tree |
242 |
100.00 |
1529 |
Minimum Suffix Flips |
Medium |
String, Greedy |
200 |
100.00 |
1528 |
Shuffle String |
Easy |
Array, String |
180 |
89.23 |
1527 |
Patients With a Condition |
Easy |
Database, SQL_I_Day_3_String_Processing_Functions |
708 |
48.23 |
1526 |
Minimum Number of Increments on Subarrays to Form a Target Array |
Hard |
Array, Dynamic_Programming, Greedy, Stack, Monotonic_Stack |
466 |
100.00 |
1525 |
Number of Good Ways to Split a String |
Medium |
String, Dynamic_Programming, Bit_Manipulation |
238 |
100.00 |
1524 |
Number of Sub-arrays With Odd Sum |
Medium |
Array, Dynamic_Programming, Math, Prefix_Sum |
584 |
100.00 |
1523 |
Count Odd Numbers in an Interval Range |
Easy |
Math, Programming_Skills_I_Day_1_Basic_Data_Type |
114 |
97.22 |
1521 |
Find a Value of a Mysterious Function Closest to Target |
Hard |
Array, Binary_Search, Bit_Manipulation, Segment_Tree |
446 |
100.00 |
1520 |
Maximum Number of Non-Overlapping Substrings |
Hard |
String, Greedy |
333 |
100.00 |
1519 |
Number of Nodes in the Sub-Tree With the Same Label |
Medium |
Hash_Table, Depth_First_Search, Breadth_First_Search, Tree, Counting |
1130 |
87.50 |
1518 |
Water Bottles |
Easy |
Math, Simulation |
116 |
100.00 |
1517 |
Find Users With Valid E-Mails |
Easy |
Database |
1278 |
77.30 |
1515 |
Best Position for a Service Centre |
Hard |
Math, Geometry, Randomized |
183 |
100.00 |
1514 |
Path with Maximum Probability |
Medium |
Heap_Priority_Queue, Graph, Shortest_Path |
681 |
100.00 |
1513 |
Number of Substrings With Only 1s |
Medium |
String, Math |
171 |
100.00 |
1512 |
Number of Good Pairs |
Easy |
Array, Hash_Table, Math, Counting |
138 |
70.65 |
1510 |
Stone Game IV |
Hard |
Dynamic_Programming, Math, Game_Theory |
137 |
100.00 |
1509 |
Minimum Difference Between Largest and Smallest Value in Three Moves |
Medium |
Array, Sorting, Greedy |
415 |
100.00 |
1508 |
Range Sum of Sorted Subarray Sums |
Medium |
Array, Sorting, Binary_Search, Two_Pointers, Binary_Search_II_Day_14 |
378 |
66.67 |
1507 |
Reformat Date |
Easy |
String |
147 |
100.00 |
1505 |
Minimum Possible Integer After at Most K Adjacent Swaps On Digits |
Hard |
String, Greedy, Segment_Tree, Binary_Indexed_Tree |
226 |
100.00 |
1504 |
Count Submatrices With All Ones |
Medium |
Array, Dynamic_Programming, Matrix, Stack, Monotonic_Stack |
265 |
80.00 |
1503 |
Last Moment Before All Ants Fall Out of a Plank |
Medium |
Array, Simulation, Brainteaser |
253 |
100.00 |
1502 |
Can Make Arithmetic Progression From Sequence |
Easy |
Array, Sorting, Programming_Skills_I_Day_4_Loop |
156 |
94.82 |
1499 |
Max Value of Equation |
Hard |
Array, Heap_Priority_Queue, Sliding_Window, Queue, Monotonic_Queue |
708 |
100.00 |
1498 |
Number of Subsequences That Satisfy the Given Sum Condition |
Medium |
Array, Sorting, Binary_Search, Two_Pointers, Binary_Search_II_Day_15 |
487 |
97.89 |
1497 |
Check If Array Pairs Are Divisible by k |
Medium |
Array, Hash_Table, Counting |
575 |
83.33 |
1496 |
Path Crossing |
Easy |
String, Hash_Table |
120 |
100.00 |
1494 |
Parallel Courses II |
Hard |
Dynamic_Programming, Bit_Manipulation, Graph, Bitmask |
381 |
100.00 |
1493 |
Longest Subarray of 1’s After Deleting One Element |
Medium |
Dynamic_Programming, Math, Sliding_Window |
288 |
73.85 |
1492 |
The kth Factor of n |
Medium |
Math |
133 |
65.12 |
1491 |
Average Salary Excluding the Minimum and Maximum Salary |
Easy |
Array, Sorting, Programming_Skills_I_Day_1_Basic_Data_Type |
137 |
91.67 |
1489 |
Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree |
Hard |
Sorting, Graph, Union_Find, Minimum_Spanning_Tree, Strongly_Connected_Component |
342 |
100.00 |
1488 |
Avoid Flood in The City |
Medium |
Array, Hash_Table, Greedy, Binary_Search, Heap_Priority_Queue, Binary_Search_II_Day_18 |
823 |
66.67 |
1487 |
Making File Names Unique |
Medium |
Array, String, Hash_Table |
553 |
50.00 |
1486 |
XOR Operation in an Array |
Easy |
Math, Bit_Manipulation |
123 |
81.25 |
1484 |
Group Sold Products By The Date |
Easy |
LeetCode_Curated_SQL_70, Database, SQL_I_Day_3_String_Processing_Functions |
899 |
40.76 |
1483 |
Kth Ancestor of a Tree Node |
Hard |
Dynamic_Programming, Depth_First_Search, Breadth_First_Search, Tree, Binary_Search, Design |
956 |
100.00 |
1482 |
Minimum Number of Days to Make m Bouquets |
Medium |
Array, Binary_Search, Binary_Search_II_Day_7 |
538 |
50.00 |
1481 |
Least Number of Unique Integers after K Removals |
Medium |
Array, Hash_Table, Sorting, Greedy, Counting |
564 |
76.19 |
1480 |
Running Sum of 1d Array |
Easy |
Array, Prefix_Sum, Level_1_Day_1_Prefix_Sum |
161 |
84.80 |
1478 |
Allocate Mailboxes |
Hard |
Array, Dynamic_Programming, Math, Sorting |
226 |
100.00 |
1477 |
Find Two Non-overlapping Sub-arrays Each With Target Sum |
Medium |
Array, Hash_Table, Dynamic_Programming, Binary_Search, Sliding_Window |
746 |
100.00 |
1476 |
Subrectangle Queries |
Medium |
Array, Matrix, Design |
332 |
81.82 |
1475 |
Final Prices With a Special Discount in a Shop |
Easy |
Array, Stack, Monotonic_Stack |
182 |
94.12 |
1473 |
Paint House III |
Hard |
Array, Dynamic_Programming |
235 |
100.00 |
1472 |
Design Browser History |
Medium |
Array, Stack, Design, Linked_List, Data_Stream, Doubly_Linked_List |
576 |
42.42 |
1471 |
The k Strongest Values in an Array |
Medium |
Array, Sorting, Two_Pointers |
780 |
100.00 |
1470 |
Shuffle the Array |
Easy |
Array |
220 |
41.96 |
1467 |
Probability of a Two Boxes Having The Same Number of Distinct Balls |
Hard |
Dynamic_Programming, Math, Backtracking, Combinatorics, Probability_and_Statistics |
150 |
100.00 |
1466 |
Reorder Routes to Make All Paths Lead to the City Zero |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Graph_Theory_I_Day_10_Standard_Traversal |
718 |
100.00 |
1465 |
Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts |
Medium |
Array, Sorting, Greedy |
418 |
50.00 |
1464 |
Maximum Product of Two Elements in an Array |
Easy |
Array, Sorting, Heap_Priority_Queue |
190 |
64.71 |
1463 |
Cherry Pickup II |
Hard |
Array, Dynamic_Programming, Matrix |
198 |
100.00 |
1462 |
Course Schedule IV |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort |
512 |
100.00 |
1461 |
Check If a String Contains All Binary Codes of Size K |
Medium |
String, Hash_Table, Bit_Manipulation, Hash_Function, Rolling_Hash |
482 |
100.00 |
1460 |
Make Two Arrays Equal by Reversing Sub-arrays |
Easy |
Array, Hash_Table, Sorting |
231 |
66.67 |
1458 |
Max Dot Product of Two Subsequences |
Hard |
Array, Dynamic_Programming |
215 |
100.00 |
1457 |
Pseudo-Palindromic Paths in a Binary Tree |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Bit_Manipulation |
583 |
50.00 |
1456 |
Maximum Number of Vowels in a Substring of Given Length |
Medium |
String, Sliding_Window |
215 |
97.25 |
1455 |
Check If a Word Occurs As a Prefix of Any Word in a Sentence |
Easy |
String, String_Matching |
155 |
42.86 |
1453 |
Maximum Number of Darts Inside of a Circular Dartboard |
Hard |
Array, Math, Geometry |
211 |
100.00 |
1452 |
People Whose List of Favorite Companies Is Not a Subset of Another List |
Medium |
Array, String, Hash_Table |
600 |
100.00 |
1451 |
Rearrange Words in a Sentence |
Medium |
String, Sorting |
263 |
100.00 |
1450 |
Number of Students Doing Homework at a Given Time |
Easy |
Array |
144 |
88.89 |
1449 |
Form Largest Integer With Digits That Add up to Target |
Hard |
Array, Dynamic_Programming |
201 |
100.00 |
1448 |
Count Good Nodes in Binary Tree |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
384 |
68.52 |
1447 |
Simplified Fractions |
Medium |
String, Math, Number_Theory |
338 |
100.00 |
1446 |
Consecutive Characters |
Easy |
String |
141 |
100.00 |
1444 |
Number of Ways of Cutting a Pizza |
Hard |
Array, Dynamic_Programming, Matrix, Memoization |
175 |
75.00 |
1443 |
Minimum Time to Collect All Apples in a Tree |
Medium |
Hash_Table, Depth_First_Search, Breadth_First_Search, Tree |
793 |
85.71 |
1442 |
Count Triplets That Can Form Two Arrays of Equal XOR |
Medium |
Array, Hash_Table, Math, Bit_Manipulation, Prefix_Sum |
145 |
100.00 |
1441 |
Build an Array With Stack Operations |
Medium |
Array, Stack, Simulation |
160 |
100.00 |
1439 |
Find the Kth Smallest Sum of a Matrix With Sorted Rows |
Hard |
Array, Binary_Search, Matrix, Heap_Priority_Queue |
225 |
100.00 |
1438 |
Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit |
Medium |
Array, Heap_Priority_Queue, Sliding_Window, Ordered_Set, Queue, Monotonic_Queue |
479 |
75.00 |
1437 |
Check If All 1’s Are at Least Length K Places Away |
Easy |
Array |
345 |
66.67 |
1436 |
Destination City |
Easy |
String, Hash_Table |
174 |
77.78 |
1434 |
Number of Ways to Wear Different Hats to Each Other |
Hard |
Array, Dynamic_Programming, Bit_Manipulation, Bitmask |
206 |
100.00 |
1433 |
Check If a String Can Break Another String |
Medium |
String, Sorting, Greedy |
221 |
100.00 |
1432 |
Max Difference You Can Get From Changing an Integer |
Medium |
Math, Greedy |
147 |
100.00 |
1431 |
Kids With the Greatest Number of Candies |
Easy |
Array |
152 |
99.61 |
1425 |
Constrained Subsequence Sum |
Hard |
Array, Dynamic_Programming, Heap_Priority_Queue, Sliding_Window, Queue, Monotonic_Queue |
649 |
33.33 |
1424 |
Diagonal Traverse II |
Medium |
Array, Sorting, Heap_Priority_Queue |
706 |
100.00 |
1423 |
Maximum Points You Can Obtain from Cards |
Medium |
Array, Prefix_Sum, Sliding_Window |
349 |
78.57 |
1422 |
Maximum Score After Splitting a String |
Easy |
String |
145 |
100.00 |
1420 |
Build Array Where You Can Find The Maximum Exactly K Comparisons |
Hard |
Dynamic_Programming |
153 |
100.00 |
1419 |
Minimum Number of Frogs Croaking |
Medium |
String, Counting |
210 |
90.91 |
1418 |
Display Table of Food Orders in a Restaurant |
Medium |
Array, String, Hash_Table, Sorting, Ordered_Set |
710 |
100.00 |
1417 |
Reformat The String |
Easy |
String |
174 |
100.00 |
1416 |
Restore The Array |
Hard |
String, Dynamic_Programming |
279 |
51.85 |
1415 |
The k-th Lexicographical String of All Happy Strings of Length n |
Medium |
String, Backtracking |
160 |
100.00 |
1414 |
Find the Minimum Number of Fibonacci Numbers Whose Sum Is K |
Medium |
Greedy |
165 |
100.00 |
1413 |
Minimum Value to Get Positive Step by Step Sum |
Easy |
Array, Prefix_Sum |
127 |
97.22 |
1411 |
Number of Ways to Paint N × 3 Grid |
Hard |
Dynamic_Programming |
201 |
100.00 |
1410 |
HTML Entity Parser |
Medium |
String, Hash_Table |
334 |
100.00 |
1409 |
Queries on a Permutation With Key |
Medium |
Array, Simulation, Binary_Indexed_Tree |
209 |
100.00 |
1408 |
String Matching in an Array |
Easy |
String, String_Matching |
194 |
77.78 |
1407 |
Top Travellers |
Easy |
LeetCode_Curated_SQL_70, Database, SQL_I_Day_9_Control_of_Flow |
1394 |
98.43 |
1406 |
Stone Game III |
Hard |
Array, Dynamic_Programming, Math, Game_Theory |
699 |
90.70 |
1405 |
Longest Happy String |
Medium |
String, Greedy, Heap_Priority_Queue |
119 |
100.00 |
1404 |
Number of Steps to Reduce a Number in Binary Representation to One |
Medium |
String, Bit_Manipulation |
144 |
100.00 |
1403 |
Minimum Subsequence in Non-Increasing Order |
Easy |
Array, Sorting, Greedy |
190 |
100.00 |
1402 |
Reducing Dishes |
Hard |
Array, Dynamic_Programming, Sorting, Greedy |
151 |
100.00 |
1401 |
Circle and Rectangle Overlapping |
Medium |
Math, Geometry |
116 |
100.00 |
1400 |
Construct K Palindrome Strings |
Medium |
String, Hash_Table, Greedy, Counting |
204 |
90.00 |
1399 |
Count Largest Group |
Easy |
Hash_Table, Math |
136 |
100.00 |
1397 |
Find All Good Strings |
Hard |
String, Dynamic_Programming, String_Matching |
273 |
100.00 |
1396 |
Design Underground System |
Medium |
String, Hash_Table, Design |
703 |
99.29 |
1395 |
Count Number of Teams |
Medium |
Array, Dynamic_Programming, Binary_Indexed_Tree |
192 |
100.00 |
1394 |
Find Lucky Integer in an Array |
Easy |
Array, Hash_Table, Counting |
161 |
100.00 |
1393 |
Capital Gain/Loss |
Medium |
LeetCode_Curated_SQL_70, Database, SQL_I_Day_9_Control_of_Flow |
990 |
47.36 |
1392 |
Longest Happy Prefix |
Hard |
String, Hash_Function, String_Matching, Rolling_Hash |
291 |
50.00 |
1391 |
Check if There is a Valid Path in a Grid |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find |
636 |
100.00 |
1390 |
Four Divisors |
Medium |
Array, Math |
255 |
100.00 |
1389 |
Create Target Array in the Given Order |
Easy |
Array, Simulation |
155 |
91.67 |
1388 |
Pizza With 3n Slices |
Hard |
Array, Dynamic_Programming, Greedy, Heap_Priority_Queue |
170 |
100.00 |
1387 |
Sort Integers by The Power Value |
Medium |
Dynamic_Programming, Sorting, Memoization |
370 |
100.00 |
1386 |
Cinema Seat Allocation |
Medium |
Array, Hash_Table, Greedy, Bit_Manipulation |
397 |
100.00 |
1385 |
Find the Distance Value Between Two Arrays |
Easy |
Array, Sorting, Binary_Search, Two_Pointers, Binary_Search_I_Day_3 |
190 |
84.62 |
1383 |
Maximum Performance of a Team |
Hard |
Array, Sorting, Greedy, Heap_Priority_Queue |
427 |
100.00 |
1382 |
Balance a Binary Search Tree |
Medium |
Depth_First_Search, Greedy, Tree, Binary_Tree, Binary_Search_Tree, Divide_and_Conquer |
369 |
85.71 |
1381 |
Design a Stack With Increment Operation |
Medium |
Array, Stack, Design |
267 |
100.00 |
1380 |
Lucky Numbers in a Matrix |
Easy |
Array, Matrix |
223 |
89.29 |
1379 |
Find a Corresponding Node of a Binary Tree in a Clone of That Tree |
Easy |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
1 |
100.00 |
1378 |
Replace Employee ID With The Unique Identifier |
Easy |
Database |
2452 |
54.86 |
1377 |
Frog Position After T Seconds |
Hard |
Depth_First_Search, Breadth_First_Search, Tree, Graph |
221 |
100.00 |
1376 |
Time Needed to Inform All Employees |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Programming_Skills_II_Day_11, Graph_Theory_I_Day_9_Standard_Traversal |
915 |
37.62 |
1375 |
Number of Times Binary String Is Prefix-Aligned |
Medium |
Array |
327 |
100.00 |
1374 |
Generate a String With Characters That Have Odd Counts |
Easy |
String |
130 |
100.00 |
1373 |
Maximum Sum BST in Binary Tree |
Hard |
Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree |
451 |
100.00 |
1372 |
Longest ZigZag Path in a Binary Tree |
Medium |
Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree |
381 |
66.11 |
1371 |
Find the Longest Substring Containing Vowels in Even Counts |
Medium |
String, Hash_Table, Bit_Manipulation, Prefix_Sum |
317 |
100.00 |
1370 |
Increasing Decreasing String |
Easy |
String, Hash_Table, Counting |
189 |
33.33 |
1368 |
Minimum Cost to Make at Least One Valid Path in a Grid |
Hard |
Array, Breadth_First_Search, Matrix, Heap_Priority_Queue, Graph, Shortest_Path |
220 |
100.00 |
1367 |
Linked List in Binary Tree |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Linked_List, Programming_Skills_II_Day_4 |
237 |
92.86 |
1366 |
Rank Teams by Votes |
Medium |
Array, String, Hash_Table, Sorting, Counting |
179 |
100.00 |
1365 |
How Many Numbers Are Smaller Than the Current Number |
Easy |
Array, Hash_Table, Sorting, Counting |
193 |
93.33 |
1363 |
Largest Multiple of Three |
Hard |
Array, Dynamic_Programming, Greedy |
267 |
100.00 |
1362 |
Closest Divisors |
Medium |
Math |
167 |
100.00 |
1361 |
Validate Binary Tree Nodes |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Graph, Union_Find |
316 |
83.33 |
1360 |
Number of Days Between Two Dates |
Easy |
String, Math |
166 |
100.00 |
1359 |
Count All Valid Pickup and Delivery Options |
Hard |
Dynamic_Programming, Math, Combinatorics |
121 |
100.00 |
1358 |
Number of Substrings Containing All Three Characters |
Medium |
String, Hash_Table, Sliding_Window |
196 |
100.00 |
1357 |
Apply Discount Every n Orders |
Medium |
Array, Hash_Table, Design |
967 |
100.00 |
1356 |
Sort Integers by The Number of 1 Bits |
Easy |
Array, Sorting, Bit_Manipulation, Counting, Programming_Skills_I_Day_11_Containers_and_Libraries |
236 |
92.31 |
1354 |
Construct Target Array With Multiple Sums |
Hard |
Array, Heap_Priority_Queue |
289 |
100.00 |
1353 |
Maximum Number of Events That Can Be Attended |
Medium |
Array, Greedy, Heap_Priority_Queue |
728 |
100.00 |
1352 |
Product of the Last K Numbers |
Medium |
Array, Math, Design, Queue, Data_Stream |
563 |
100.00 |
1351 |
Count Negative Numbers in a Sorted Matrix |
Easy |
Array, Binary_Search, Matrix, Binary_Search_I_Day_8 |
206 |
71.43 |
1349 |
Maximum Students Taking Exam |
Hard |
Array, Dynamic_Programming, Matrix, Bit_Manipulation, Bitmask |
173 |
100.00 |
1348 |
Tweet Counts Per Frequency |
Medium |
Hash_Table, Sorting, Binary_Search, Design, Ordered_Set |
701 |
100.00 |
1347 |
Minimum Number of Steps to Make Two Strings Anagram |
Medium |
String, Hash_Table, Counting |
250 |
67.35 |
1346 |
Check If N and Its Double Exist |
Easy |
Array, Hash_Table, Sorting, Binary_Search, Two_Pointers, Binary_Search_I_Day_9 |
175 |
70.83 |
1345 |
Jump Game IV |
Hard |
Array, Hash_Table, Breadth_First_Search |
599 |
100.00 |
1344 |
Angle Between Hands of a Clock |
Medium |
Math |
118 |
83.33 |
1343 |
Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold |
Medium |
Array, Sliding_Window |
394 |
84.62 |
1342 |
Number of Steps to Reduce a Number to Zero |
Easy |
Math, Bit_Manipulation |
124 |
83.18 |
1341 |
Movie Rating |
Medium |
Database |
2843 |
48.31 |
1340 |
Jump Game V |
Hard |
Array, Dynamic_Programming, Sorting |
208 |
100.00 |
1339 |
Maximum Product of Splitted Binary Tree |
Medium |
Depth_First_Search, Tree, Binary_Tree |
384 |
100.00 |
1338 |
Reduce Array Size to The Half |
Medium |
Array, Hash_Table, Sorting, Greedy, Heap_Priority_Queue |
579 |
71.43 |
1337 |
The K Weakest Rows in a Matrix |
Easy |
Array, Sorting, Binary_Search, Matrix, Heap_Priority_Queue, Binary_Search_I_Day_9 |
216 |
77.59 |
1335 |
Minimum Difficulty of a Job Schedule |
Hard |
Array, Dynamic_Programming |
154 |
100.00 |
1334 |
Find the City With the Smallest Number of Neighbors at a Threshold Distance |
Medium |
Dynamic_Programming, Graph, Shortest_Path |
223 |
88.89 |
1333 |
Filter Restaurants by Vegan-Friendly, Price and Distance |
Medium |
Array, Sorting |
326 |
100.00 |
1332 |
Remove Palindromic Subsequences |
Easy |
String, Two_Pointers |
122 |
83.33 |
1331 |
Rank Transform of an Array |
Easy |
Array, Hash_Table, Sorting |
553 |
100.00 |
1330 |
Reverse Subarray To Maximize Array Value |
Hard |
Array, Math, Greedy |
347 |
100.00 |
1329 |
Sort the Matrix Diagonally |
Medium |
Array, Sorting, Matrix |
243 |
100.00 |
1328 |
Break a Palindrome |
Medium |
String, Greedy |
137 |
81.82 |
1327 |
List the Products Ordered in a Period |
Easy |
Database |
1324 |
61.30 |
1326 |
Minimum Number of Taps to Open to Water a Garden |
Hard |
Array, Dynamic_Programming, Greedy |
189 |
100.00 |
1325 |
Delete Leaves With a Given Value |
Medium |
Depth_First_Search, Tree, Binary_Tree |
185 |
100.00 |
1324 |
Print Words Vertically |
Medium |
Array, String, Simulation |
149 |
66.67 |
1323 |
Maximum 69 Number |
Easy |
Math, Greedy |
118 |
90.00 |
1321 |
Restaurant Growth |
Medium |
Database |
630 |
83.05 |
1320 |
Minimum Distance to Type a Word Using Two Fingers |
Hard |
String, Dynamic_Programming |
181 |
100.00 |
1319 |
Number of Operations to Make Network Connected |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Union_Find, Graph_Theory_I_Day_8_Standard_Traversal |
379 |
83.33 |
1318 |
Minimum Flips to Make a OR b Equal to c |
Medium |
Bit_Manipulation |
123 |
88.89 |
1317 |
Convert Integer to the Sum of Two No-Zero Integers |
Easy |
Math |
146 |
100.00 |
1316 |
Distinct Echo Substrings |
Hard |
String, Dynamic_Programming, Sliding_Window, Trie, Hash_Function, Rolling_Hash |
371 |
100.00 |
1315 |
Sum of Nodes with Even-Valued Grandparent |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
257 |
82.35 |
1314 |
Matrix Block Sum |
Medium |
Array, Matrix, Prefix_Sum, Dynamic_Programming_I_Day_14 |
235 |
100.00 |
1313 |
Decompress Run-Length Encoded List |
Easy |
Array |
196 |
100.00 |
1312 |
Minimum Insertion Steps to Make a String Palindrome |
Hard |
String, Dynamic_Programming |
186 |
67.70 |
1311 |
Get Watched Videos by Your Friends |
Medium |
Array, Hash_Table, Sorting, Breadth_First_Search |
372 |
100.00 |
1310 |
XOR Queries of a Subarray |
Medium |
Array, Bit_Manipulation, Prefix_Sum |
382 |
100.00 |
1309 |
Decrypt String from Alphabet to Integer Mapping |
Easy |
String, Programming_Skills_I_Day_9_String |
129 |
95.45 |
1307 |
Verbal Arithmetic Puzzle |
Hard |
Array, String, Math, Backtracking |
164 |
100.00 |
1306 |
Jump Game III |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Graph_Theory_I_Day_11_Breadth_First_Search, Udemy_Arrays |
291 |
100.00 |
1305 |
All Elements in Two Binary Search Trees |
Medium |
Sorting, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree |
531 |
100.00 |
1304 |
Find N Unique Integers Sum up to Zero |
Easy |
Array, Math |
142 |
100.00 |
1302 |
Deepest Leaves Sum |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
325 |
67.39 |
1301 |
Number of Paths with Max Score |
Hard |
Array, Dynamic_Programming, Matrix |
178 |
100.00 |
1300 |
Sum of Mutated Array Closest to Target |
Medium |
Array, Sorting, Binary_Search, Binary_Search_II_Day_16 |
217 |
100.00 |
1299 |
Replace Elements with Greatest Element on Right Side |
Easy |
Array |
514 |
79.69 |
1298 |
Maximum Candies You Can Get from Boxes |
Hard |
Array, Breadth_First_Search |
442 |
80.00 |
1297 |
Maximum Number of Occurrences of a Substring |
Medium |
String, Hash_Table, Sliding_Window |
253 |
75.00 |
1296 |
Divide Array in Sets of K Consecutive Numbers |
Medium |
Array, Hash_Table, Sorting, Greedy |
488 |
100.00 |
1295 |
Find Numbers with Even Number of Digits |
Easy |
Array |
189 |
35.85 |
1293 |
Shortest Path in a Grid with Obstacles Elimination |
Hard |
Array, Breadth_First_Search, Matrix |
189 |
100.00 |
1292 |
Maximum Side Length of a Square with Sum Less than or Equal to Threshold |
Medium |
Array, Binary_Search, Matrix, Prefix_Sum, Binary_Search_II_Day_15 |
376 |
100.00 |
1291 |
Sequential Digits |
Medium |
Enumeration, Udemy_Arrays |
114 |
100.00 |
1290 |
Convert Binary Number in a Linked List to Integer |
Easy |
Math, Linked_List, Programming_Skills_I_Day_10_Linked_List_and_Tree |
138 |
65.79 |
1289 |
Minimum Falling Path Sum II |
Hard |
Array, Dynamic_Programming, Matrix |
234 |
100.00 |
1288 |
Remove Covered Intervals |
Medium |
Array, Sorting |
184 |
100.00 |
1287 |
Element Appearing More Than 25% In Sorted Array |
Easy |
Array |
199 |
100.00 |
1286 |
Iterator for Combination |
Medium |
String, Design, Backtracking, Iterator |
236 |
100.00 |
1284 |
Minimum Number of Flips to Convert Binary Matrix to Zero Matrix |
Hard |
Array, Breadth_First_Search, Matrix, Bit_Manipulation |
131 |
100.00 |
1283 |
Find the Smallest Divisor Given a Threshold |
Medium |
Array, Binary_Search, Binary_Search_II_Day_5 |
255 |
100.00 |
1282 |
Group the People Given the Group Size They Belong To |
Medium |
Array, Hash_Table |
267 |
100.00 |
1281 |
Subtract the Product and Sum of Digits of an Integer |
Easy |
Math, Programming_Skills_I_Day_2_Operator |
128 |
61.82 |
1280 |
Students and Examinations |
Easy |
Database |
1552 |
85.96 |
1278 |
Palindrome Partitioning III |
Hard |
String, Dynamic_Programming |
137 |
100.00 |
1277 |
Count Square Submatrices with All Ones |
Medium |
Array, Dynamic_Programming, Matrix |
381 |
75.00 |
1276 |
Number of Burgers with No Waste of Ingredients |
Medium |
Math |
190 |
50.00 |
1275 |
Find Winner on a Tic Tac Toe Game |
Easy |
Array, Hash_Table, Matrix, Simulation |
125 |
87.50 |
1269 |
Number of Ways to Stay in the Same Place After Some Steps |
Hard |
Dynamic_Programming |
159 |
50.00 |
1268 |
Search Suggestions System |
Medium |
Array, String |
331 |
100.00 |
1267 |
Count Servers that Communicate |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Counting, Union_Find |
295 |
100.00 |
1266 |
Minimum Time Visiting All Points |
Easy |
Array, Math, Geometry |
152 |
100.00 |
1263 |
Minimum Moves to Move a Box to Their Target Location |
Hard |
Array, Breadth_First_Search, Matrix, Heap_Priority_Queue |
183 |
100.00 |
1262 |
Greatest Sum Divisible by Three |
Medium |
Array, Dynamic_Programming, Greedy |
263 |
100.00 |
1261 |
Find Elements in a Contaminated Binary Tree |
Medium |
Hash_Table, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Design |
287 |
100.00 |
1260 |
Shift 2D Grid |
Easy |
Array, Matrix, Simulation |
302 |
100.00 |
1255 |
Maximum Score Words Formed by Letters |
Hard |
Array, String, Dynamic_Programming, Bit_Manipulation, Backtracking, Bitmask |
131 |
100.00 |
1254 |
Number of Closed Islands |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Graph_Theory_I_Day_2_Matrix_Related_Problems |
177 |
89.47 |
1253 |
Reconstruct a 2-Row Binary Matrix |
Medium |
Array, Greedy, Matrix |
496 |
75.00 |
1252 |
Cells with Odd Values in a Matrix |
Easy |
Array, Math, Simulation |
134 |
100.00 |
1251 |
Average Selling Price |
Easy |
Database |
1371 |
76.11 |
1250 |
Check If It Is a Good Array |
Hard |
Array, Math, Number_Theory |
334 |
100.00 |
1249 |
Minimum Remove to Make Valid Parentheses |
Medium |
String, Stack, Data_Structure_II_Day_14_Stack_Queue |
218 |
100.00 |
1248 |
Count Number of Nice Subarrays |
Medium |
Array, Hash_Table, Math, Sliding_Window |
431 |
93.33 |
1247 |
Minimum Swaps to Make Strings Equal |
Medium |
String, Math, Greedy |
134 |
66.67 |
1240 |
Tiling a Rectangle with the Fewest Squares |
Hard |
Dynamic_Programming, Backtracking |
134 |
75.00 |
1239 |
Maximum Length of a Concatenated String with Unique Characters |
Medium |
Array, String, Bit_Manipulation, Backtracking |
166 |
50.00 |
1238 |
Circular Permutation in Binary Representation |
Medium |
Math, Bit_Manipulation, Backtracking |
296 |
100.00 |
1237 |
Find Positive Integer Solution for a Given Equation |
Medium |
Math, Binary_Search, Two_Pointers, Interactive |
176 |
36.36 |
1235 |
Maximum Profit in Job Scheduling |
Hard |
Array, Dynamic_Programming, Sorting, Binary_Search |
370 |
100.00 |
1234 |
Replace the Substring for Balanced String |
Medium |
String, Sliding_Window |
182 |
100.00 |
1233 |
Remove Sub-Folders from the Filesystem |
Medium |
Array, String, Trie |
459 |
40.00 |
1232 |
Check If It Is a Straight Line |
Easy |
Array, Math, Geometry, Programming_Skills_I_Day_5_Function |
152 |
95.38 |
1227 |
Airplane Seat Assignment Probability |
Medium |
Dynamic_Programming, Math, Brainteaser, Probability_and_Statistics |
135 |
100.00 |
1226 |
The Dining Philosophers |
Medium |
Concurrency |
12 |
95.88 |
1224 |
Maximum Equal Frequency |
Hard |
Array, Hash_Table |
330 |
100.00 |
1223 |
Dice Roll Simulation |
Hard |
Array, Dynamic_Programming |
146 |
100.00 |
1222 |
Queens That Can Attack the King |
Medium |
Array, Matrix, Simulation |
189 |
50.00 |
1221 |
Split a String in Balanced Strings |
Easy |
String, Greedy, Counting |
131 |
67.65 |
1220 |
Count Vowels Permutation |
Hard |
Dynamic_Programming |
129 |
100.00 |
1219 |
Path with Maximum Gold |
Medium |
Array, Matrix, Backtracking |
238 |
100.00 |
1218 |
Longest Arithmetic Subsequence of Given Difference |
Medium |
Array, Hash_Table, Dynamic_Programming |
420 |
100.00 |
1217 |
Minimum Cost to Move Chips to The Same Position |
Easy |
Array, Math, Greedy |
119 |
100.00 |
1211 |
Queries Quality and Percentage |
Easy |
Database |
1176 |
80.10 |
1210 |
Minimum Moves to Reach Target with Rotations |
Hard |
Array, Breadth_First_Search, Matrix |
230 |
100.00 |
1209 |
Remove All Adjacent Duplicates in String II |
Medium |
String, Stack |
223 |
100.00 |
1208 |
Get Equal Substrings Within Budget |
Medium |
String, Binary_Search, Prefix_Sum, Sliding_Window |
163 |
100.00 |
1207 |
Unique Number of Occurrences |
Easy |
Array, Hash_Table |
151 |
83.00 |
1206 |
Design Skiplist |
Hard |
Design, Linked_List |
306 |
100.00 |
1204 |
Last Person to Fit in the Bus |
Medium |
Database |
1476 |
82.95 |
1203 |
Sort Items by Groups Respecting Dependencies |
Hard |
Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort |
503 |
100.00 |
1202 |
Smallest String With Swaps |
Medium |
String, Hash_Table, Depth_First_Search, Breadth_First_Search, Union_Find |
562 |
100.00 |
1201 |
Ugly Number III |
Medium |
Math, Binary_Search, Number_Theory, Binary_Search_II_Day_20 |
136 |
100.00 |
1200 |
Minimum Absolute Difference |
Easy |
Array, Sorting |
507 |
75.00 |
1195 |
Fizz Buzz Multithreaded |
Medium |
Concurrency |
6 |
87.26 |
1193 |
Monthly Transactions I |
Medium |
Database |
891 |
92.73 |
1192 |
Critical Connections in a Network |
Hard |
Depth_First_Search, Graph, Biconnected_Component |
1696 |
60.00 |
1191 |
K-Concatenation Maximum Sum |
Medium |
Array, Dynamic_Programming |
389 |
100.00 |
1190 |
Reverse Substrings Between Each Pair of Parentheses |
Medium |
String, Stack |
153 |
42.86 |
1189 |
Maximum Number of Balloons |
Easy |
String, Hash_Table, Counting |
136 |
98.31 |
1187 |
Make Array Strictly Increasing |
Hard |
Array, Dynamic_Programming, Binary_Search |
308 |
100.00 |
1186 |
Maximum Subarray Sum with One Deletion |
Medium |
Array, Dynamic_Programming |
304 |
50.00 |
1185 |
Day of the Week |
Easy |
Math |
127 |
50.00 |
1184 |
Distance Between Bus Stops |
Easy |
Array |
164 |
57.14 |
1179 |
Reformat Department Table |
Easy |
Database |
815 |
90.95 |
1178 |
Number of Valid Words for Each Puzzle |
Hard |
Array, String, Hash_Table, Bit_Manipulation, Trie |
675 |
100.00 |
1177 |
Can Make Palindrome from Substring |
Medium |
String, Hash_Table, Bit_Manipulation, Prefix_Sum |
937 |
100.00 |
1175 |
Prime Arrangements |
Easy |
Math |
129 |
50.00 |
1174 |
Immediate Food Delivery II |
Medium |
Database |
981 |
97.51 |
1172 |
Dinner Plate Stacks |
Hard |
Hash_Table, Stack, Design, Heap_Priority_Queue |
1160 |
50.00 |
1171 |
Remove Zero Sum Consecutive Nodes from Linked List |
Medium |
Hash_Table, Linked_List |
194 |
50.00 |
1170 |
Compare Strings by Frequency of the Smallest Character |
Medium |
Array, String, Hash_Table, Sorting, Binary_Search |
221 |
50.00 |
1169 |
Invalid Transactions |
Medium |
Array, String, Hash_Table, Sorting |
362 |
57.14 |
1164 |
Product Price at a Given Date |
Medium |
Database |
774 |
91.86 |
1163 |
Last Substring in Lexicographical Order |
Hard |
String, Two_Pointers |
254 |
100.00 |
1162 |
As Far from Land as Possible |
Medium |
Array, Dynamic_Programming, Breadth_First_Search, Matrix, Graph_Theory_I_Day_4_Matrix_Related_Problems |
362 |
81.25 |
1161 |
Maximum Level Sum of a Binary Tree |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
445 |
87.50 |
1160 |
Find Words That Can Be Formed by Characters |
Easy |
Array, String, Hash_Table |
288 |
72.22 |
1158 |
Market Analysis I |
Medium |
Database, SQL_I_Day_9_Control_of_Flow |
2470 |
44.76 |
1157 |
Online Majority Element In Subarray |
Hard |
Array, Binary_Search, Design, Segment_Tree, Binary_Indexed_Tree |
953 |
100.00 |
1156 |
Swap For Longest Repeated Character Substring |
Medium |
String, Sliding_Window |
198 |
100.00 |
1155 |
Number of Dice Rolls With Target Sum |
Medium |
Dynamic_Programming |
158 |
80.95 |
1154 |
Day of the Year |
Easy |
String, Math |
317 |
70.00 |
1148 |
Article Views I |
Easy |
LeetCode_Curated_SQL_70, Database, SQL_I_Day_5_Union |
806 |
54.41 |
1147 |
Longest Chunked Palindrome Decomposition |
Hard |
String, Dynamic_Programming, Greedy, Two_Pointers, Hash_Function, Rolling_Hash |
148 |
50.00 |
1146 |
Snapshot Array |
Medium |
Array, Hash_Table, Binary_Search, Design, Binary_Search_II_Day_18 |
1064 |
57.14 |
1145 |
Binary Tree Coloring Game |
Medium |
Depth_First_Search, Tree, Binary_Tree |
181 |
100.00 |
1144 |
Decrease Elements To Make Array Zigzag |
Medium |
Array, Greedy |
144 |
100.00 |
1143 |
Longest Common Subsequence |
Medium |
Top_100_Liked_Questions, String, Dynamic_Programming, Algorithm_II_Day_17_Dynamic_Programming, Dynamic_Programming_I_Day_19, Udemy_Dynamic_Programming, Big_O_Time_O(n*m)_Space_O(n*m) |
307 |
38.36 |
1141 |
User Activity for the Past 30 Days I |
Easy |
LeetCode_Curated_SQL_70, Database, SQL_I_Day_7_Function |
790 |
87.11 |
1140 |
Stone Game II |
Medium |
Array, Dynamic_Programming, Math, Game_Theory |
166 |
93.27 |
1139 |
Largest 1-Bordered Square |
Medium |
Array, Dynamic_Programming, Matrix |
224 |
100.00 |
1138 |
Alphabet Board Path |
Medium |
String, Hash_Table |
138 |
100.00 |
1137 |
N-th Tribonacci Number |
Easy |
Dynamic_Programming, Math, Memoization, Dynamic_Programming_I_Day_1 |
122 |
69.35 |
1131 |
Maximum of Absolute Value Expression |
Medium |
Array, Math |
333 |
100.00 |
1130 |
Minimum Cost Tree From Leaf Values |
Medium |
Dynamic_Programming, Greedy, Stack, Monotonic_Stack |
145 |
66.67 |
1129 |
Shortest Path with Alternating Colors |
Medium |
Breadth_First_Search, Graph, Graph_Theory_I_Day_10_Standard_Traversal |
208 |
80.00 |
1128 |
Number of Equivalent Domino Pairs |
Easy |
Array, Hash_Table, Counting |
289 |
80.00 |
1125 |
Smallest Sufficient Team |
Hard |
Array, Dynamic_Programming, Bit_Manipulation, Bitmask |
181 |
100.00 |
1124 |
Longest Well-Performing Interval |
Medium |
Array, Hash_Table, Stack, Prefix_Sum, Monotonic_Stack |
313 |
100.00 |
1123 |
Lowest Common Ancestor of Deepest Leaves |
Medium |
Hash_Table, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
221 |
66.67 |
1122 |
Relative Sort Array |
Easy |
Array, Hash_Table, Sorting, Counting_Sort |
183 |
90.00 |
1117 |
Building H2O |
Medium |
Concurrency |
20 |
45.16 |
1116 |
Print Zero Even Odd |
Medium |
Concurrency |
7 |
39.21 |
1115 |
Print FooBar Alternately |
Medium |
Concurrency |
23 |
71.25 |
1114 |
Print in Order |
Easy |
Concurrency |
13 |
30.13 |
1111 |
Maximum Nesting Depth of Two Valid Parentheses Strings |
Medium |
String, Stack |
207 |
33.33 |
1110 |
Delete Nodes And Return Forest |
Medium |
Depth_First_Search, Tree, Binary_Tree |
223 |
100.00 |
1109 |
Corporate Flight Bookings |
Medium |
Array, Prefix_Sum |
719 |
100.00 |
1108 |
Defanging an IP Address |
Easy |
String |
159 |
62.10 |
1106 |
Parsing A Boolean Expression |
Hard |
String, Stack, Recursion |
205 |
100.00 |
1105 |
Filling Bookcase Shelves |
Medium |
Array, Dynamic_Programming |
175 |
33.33 |
1104 |
Path In Zigzag Labelled Binary Tree |
Medium |
Math, Tree, Binary_Tree |
136 |
100.00 |
1103 |
Distribute Candies to People |
Easy |
Math, Simulation |
129 |
100.00 |
1096 |
Brace Expansion II |
Hard |
String, Breadth_First_Search, Stack, Backtracking |
205 |
100.00 |
1095 |
Find in Mountain Array |
Hard |
Array, Binary_Search, Interactive |
173 |
100.00 |
1094 |
Car Pooling |
Medium |
Array, Sorting, Heap_Priority_Queue, Simulation, Prefix_Sum |
172 |
81.82 |
1093 |
Statistics from a Large Sample |
Medium |
Math, Two_Pointers, Probability_and_Statistics |
191 |
100.00 |
1092 |
Shortest Common Supersequence |
Hard |
String, Dynamic_Programming |
174 |
100.00 |
1091 |
Shortest Path in Binary Matrix |
Medium |
Array, Breadth_First_Search, Matrix, Algorithm_II_Day_8_Breadth_First_Search_Depth_First_Search, Graph_Theory_I_Day_5_Matrix_Related_Problems |
305 |
98.28 |
1090 |
Largest Values From Labels |
Medium |
Array, Hash_Table, Sorting, Greedy, Counting |
281 |
100.00 |
1089 |
Duplicate Zeros |
Easy |
Array, Two_Pointers |
185 |
93.60 |
1084 |
Sales Analysis III |
Easy |
LeetCode_Curated_SQL_70, Database, SQL_I_Day_10_Where |
1881 |
79.36 |
1081 |
Smallest Subsequence of Distinct Characters |
Medium |
String, Greedy, Stack, Monotonic_Stack |
146 |
100.00 |
1080 |
Insufficient Nodes in Root to Leaf Paths |
Medium |
Depth_First_Search, Tree, Binary_Tree |
271 |
100.00 |
1079 |
Letter Tile Possibilities |
Medium |
String, Backtracking |
144 |
100.00 |
1078 |
Occurrences After Bigram |
Easy |
String |
151 |
88.24 |
1075 |
Project Employees I |
Easy |
Database |
1268 |
94.71 |
1074 |
Number of Submatrices That Sum to Target |
Hard |
Array, Hash_Table, Matrix, Prefix_Sum |
770 |
100.00 |
1073 |
Adding Two Negabinary Numbers |
Medium |
Array, Math |
187 |
100.00 |
1072 |
Flip Columns For Maximum Number of Equal Rows |
Medium |
Array, Hash_Table, Matrix |
536 |
100.00 |
1071 |
Greatest Common Divisor of Strings |
Easy |
String, Math |
150 |
80.68 |
1070 |
Product Sales Analysis III |
Medium |
Database |
1561 |
95.47 |
1068 |
Product Sales Analysis I |
Easy |
Database |
1897 |
79.88 |
1061 |
Lexicographically Smallest Equivalent String |
Medium |
String, Union_Find |
166 |
100.00 |
1054 |
Distant Barcodes |
Medium |
Array, Hash_Table, Sorting, Greedy, Heap_Priority_Queue, Counting |
622 |
75.00 |
1053 |
Previous Permutation With One Swap |
Medium |
Array, Greedy |
288 |
100.00 |
1052 |
Grumpy Bookstore Owner |
Medium |
Array, Sliding_Window |
268 |
80.00 |
1051 |
Height Checker |
Easy |
Array, Sorting, Counting_Sort |
140 |
94.37 |
1050 |
Actors and Directors Who Cooperated At Least Three Times |
Easy |
LeetCode_Curated_SQL_70, Database, SQL_I_Day_10_Where |
629 |
81.02 |
1049 |
Last Stone Weight II |
Medium |
Array, Dynamic_Programming |
150 |
100.00 |
1048 |
Longest String Chain |
Medium |
Array, String, Hash_Table, Dynamic_Programming, Two_Pointers |
273 |
75.00 |
1047 |
Remove All Adjacent Duplicates In String |
Easy |
String, Stack |
228 |
94.52 |
1046 |
Last Stone Weight |
Easy |
Array, Heap_Priority_Queue, Level_1_Day_15_Heap |
123 |
100.00 |
1045 |
Customers Who Bought All Products |
Medium |
Database |
881 |
90.47 |
1044 |
Longest Duplicate Substring |
Hard |
String, Binary_Search, Sliding_Window, Hash_Function, Rolling_Hash, Suffix_Array |
592 |
100.00 |
1043 |
Partition Array for Maximum Sum |
Medium |
Array, Dynamic_Programming |
194 |
71.43 |
1042 |
Flower Planting With No Adjacent |
Medium |
Depth_First_Search, Breadth_First_Search, Graph |
396 |
85.71 |
1041 |
Robot Bounded In Circle |
Medium |
String, Math, Simulation |
121 |
100.00 |
1040 |
Moving Stones Until Consecutive II |
Medium |
Array, Math, Sorting, Two_Pointers |
287 |
50.00 |
1039 |
Minimum Score Triangulation of Polygon |
Medium |
Array, Dynamic_Programming |
147 |
100.00 |
1038 |
Binary Search Tree to Greater Sum Tree |
Medium |
Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree |
123 |
91.67 |
1037 |
Valid Boomerang |
Easy |
Array, Math, Geometry |
126 |
100.00 |
1036 |
Escape a Large Maze |
Hard |
Array, Hash_Table, Depth_First_Search, Breadth_First_Search |
387 |
100.00 |
1035 |
Uncrossed Lines |
Medium |
Array, Dynamic_Programming |
162 |
93.33 |
1034 |
Coloring A Border |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix |
332 |
100.00 |
1033 |
Moving Stones Until Consecutive |
Medium |
Math, Brainteaser |
139 |
100.00 |
1032 |
Stream of Characters |
Hard |
Array, String, Design, Trie, Data_Stream |
733 |
100.00 |
1031 |
Maximum Sum of Two Non-Overlapping Subarrays |
Medium |
Array, Dynamic_Programming, Sliding_Window |
172 |
100.00 |
1030 |
Matrix Cells in Distance Order |
Easy |
Array, Math, Sorting, Matrix, Geometry |
426 |
100.00 |
1029 |
Two City Scheduling |
Medium |
Array, Sorting, Greedy |
148 |
100.00 |
1028 |
Recover a Tree From Preorder Traversal |
Hard |
String, Depth_First_Search, Tree, Binary_Tree |
246 |
100.00 |
1027 |
Longest Arithmetic Subsequence |
Medium |
Array, Hash_Table, Dynamic_Programming, Binary_Search |
330 |
100.00 |
1026 |
Maximum Difference Between Node and Ancestor |
Medium |
Depth_First_Search, Tree, Binary_Tree |
155 |
77.78 |
1025 |
Divisor Game |
Easy |
Dynamic_Programming, Math, Game_Theory, Brainteaser |
114 |
93.33 |
1024 |
Video Stitching |
Medium |
Array, Dynamic_Programming, Greedy |
141 |
100.00 |
1023 |
Camelcase Matching |
Medium |
String, Two_Pointers, Trie, String_Matching |
149 |
60.00 |
1022 |
Sum of Root To Leaf Binary Numbers |
Easy |
Depth_First_Search, Tree, Binary_Tree |
158 |
88.89 |
1021 |
Remove Outermost Parentheses |
Easy |
String, Stack |
156 |
60.00 |
1020 |
Number of Enclaves |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Graph_Theory_I_Day_3_Matrix_Related_Problems |
283 |
90.70 |
1019 |
Next Greater Node In Linked List |
Medium |
Array, Stack, Linked_List, Monotonic_Stack |
472 |
75.00 |
1018 |
Binary Prefix Divisible By 5 |
Easy |
Array |
297 |
100.00 |
1017 |
Convert to Base -2 |
Medium |
Math |
138 |
100.00 |
1016 |
Binary String With Substrings Representing 1 To N |
Medium |
String |
134 |
75.00 |
1015 |
Smallest Integer Divisible by K |
Medium |
Hash_Table, Math |
123 |
100.00 |
1014 |
Best Sightseeing Pair |
Medium |
Array, Dynamic_Programming, Dynamic_Programming_I_Day_7 |
336 |
66.67 |
1013 |
Partition Array Into Three Parts With Equal Sum |
Easy |
Array, Greedy |
328 |
100.00 |
1012 |
Numbers With Repeated Digits |
Hard |
Dynamic_Programming, Math |
123 |
100.00 |
1011 |
Capacity To Ship Packages Within D Days |
Medium |
Array, Binary_Search |
325 |
66.67 |
1010 |
Pairs of Songs With Total Durations Divisible by 60 |
Medium |
Array, Hash_Table, Counting |
287 |
77.78 |
1009 |
Complement of Base 10 Integer |
Easy |
Bit_Manipulation, Udemy_Bit_Manipulation |
126 |
72.73 |
1008 |
Construct Binary Search Tree from Preorder Traversal |
Medium |
Array, Tree, Binary_Tree, Stack, Monotonic_Stack, Binary_Search_Tree, Udemy_Tree_Stack_Queue |
145 |
100.00 |
1007 |
Minimum Domino Rotations For Equal Row |
Medium |
Array, Greedy, Udemy_Arrays |
421 |
50.00 |
1006 |
Clumsy Factorial |
Medium |
Math, Stack, Simulation |
127 |
100.00 |
1005 |
Maximize Sum Of Array After K Negations |
Easy |
Array, Sorting, Greedy |
167 |
100.00 |
1004 |
Max Consecutive Ones III |
Medium |
Array, Binary_Search, Prefix_Sum, Sliding_Window |
318 |
30.95 |
1003 |
Check If Word Is Valid After Substitutions |
Medium |
String, Stack |
216 |
100.00 |
1002 |
Find Common Characters |
Easy |
Array, String, Hash_Table |
181 |
100.00 |
1001 |
Grid Illumination |
Hard |
Array, Hash_Table |
801 |
100.00 |
1000 |
Minimum Cost to Merge Stones |
Hard |
Array, Dynamic_Programming |
152 |
75.00 |
0999 |
Available Captures for Rook |
Easy |
Array, Matrix, Simulation |
143 |
80.00 |
0998 |
Maximum Binary Tree II |
Medium |
Tree, Binary_Tree |
157 |
100.00 |
0997 |
Find the Town Judge |
Easy |
Array, Hash_Table, Graph, Data_Structure_II_Day_19_Graph, Graph_Theory_I_Day_13_Graph_Theory |
475 |
58.62 |
0996 |
Number of Squareful Arrays |
Hard |
Array, Dynamic_Programming, Math, Bit_Manipulation, Backtracking, Bitmask |
139 |
100.00 |
0995 |
Minimum Number of K Consecutive Bit Flips |
Hard |
Array, Bit_Manipulation, Prefix_Sum, Sliding_Window |
480 |
100.00 |
0994 |
Rotting Oranges |
Medium |
Top_100_Liked_Questions, Array, Breadth_First_Search, Matrix, Algorithm_I_Day_9_Breadth_First_Search_Depth_First_Search, Level_2_Day_10_Graph/BFS/DFS |
164 |
82.95 |
0993 |
Cousins in Binary Tree |
Easy |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
152 |
71.43 |
0992 |
Subarrays with K Different Integers |
Hard |
Array, Hash_Table, Counting, Sliding_Window |
341 |
87.50 |
0991 |
Broken Calculator |
Medium |
Math, Greedy |
127 |
100.00 |
0990 |
Satisfiability of Equality Equations |
Medium |
Array, String, Graph, Union_Find |
163 |
100.00 |
0989 |
Add to Array-Form of Integer |
Easy |
Array, Math, Programming_Skills_II_Day_5 |
350 |
70.00 |
0988 |
Smallest String Starting From Leaf |
Medium |
String, Depth_First_Search, Tree, Binary_Tree |
180 |
100.00 |
0987 |
Vertical Order Traversal of a Binary Tree |
Hard |
Hash_Table, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
189 |
66.67 |
0986 |
Interval List Intersections |
Medium |
Array, Two_Pointers, Algorithm_II_Day_4_Two_Pointers |
318 |
60.98 |
0985 |
Sum of Even Numbers After Queries |
Medium |
Array, Simulation |
497 |
71.43 |
0984 |
String Without AAA or BBB |
Medium |
String, Greedy |
132 |
66.67 |
0983 |
Minimum Cost For Tickets |
Medium |
Array, Dynamic_Programming |
147 |
92.80 |
0982 |
Triples with Bitwise AND Equal To Zero |
Hard |
Array, Hash_Table, Bit_Manipulation |
227 |
100.00 |
0981 |
Time Based Key-Value Store |
Medium |
String, Hash_Table, Binary_Search, Design, Binary_Search_II_Day_16 |
1011 |
65.56 |
0980 |
Unique Paths III |
Hard |
Array, Matrix, Bit_Manipulation, Backtracking |
134 |
100.00 |
0979 |
Distribute Coins in Binary Tree |
Medium |
Depth_First_Search, Tree, Binary_Tree |
165 |
80.00 |
0978 |
Longest Turbulent Subarray |
Medium |
Array, Dynamic_Programming, Sliding_Window |
395 |
40.00 |
0977 |
Squares of a Sorted Array |
Easy |
Array, Sorting, Two_Pointers, Algorithm_I_Day_2_Two_Pointers, Udemy_Two_Pointers |
271 |
77.17 |
0976 |
Largest Perimeter Triangle |
Easy |
Array, Math, Sorting, Greedy, Programming_Skills_I_Day_3_Conditional_Statements |
304 |
33.33 |
0975 |
Odd Even Jump |
Hard |
Array, Dynamic_Programming, Stack, Ordered_Set, Monotonic_Stack |
326 |
100.00 |
0974 |
Subarray Sums Divisible by K |
Medium |
Array, Hash_Table, Prefix_Sum |
334 |
66.67 |
0973 |
K Closest Points to Origin |
Medium |
Array, Math, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Geometry, Quickselect, Data_Structure_II_Day_21_Heap_Priority_Queue, Programming_Skills_II_Day_8 |
800 |
37.89 |
0972 |
Equal Rational Numbers |
Hard |
String, Math |
130 |
100.00 |
0971 |
Flip Binary Tree To Match Preorder Traversal |
Medium |
Depth_First_Search, Tree, Binary_Tree |
173 |
66.67 |
0970 |
Powerful Integers |
Medium |
Hash_Table, Math |
136 |
100.00 |
0969 |
Pancake Sorting |
Medium |
Array, Sorting, Greedy, Two_Pointers |
169 |
100.00 |
0968 |
Binary Tree Cameras |
Hard |
Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree, Udemy_Tree_Stack_Queue |
176 |
100.00 |
0967 |
Numbers With Same Consecutive Differences |
Medium |
Breadth_First_Search, Backtracking |
144 |
100.00 |
0966 |
Vowel Spellchecker |
Medium |
Array, String, Hash_Table |
371 |
100.00 |
0965 |
Univalued Binary Tree |
Easy |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
138 |
90.91 |
0964 |
Least Operators to Express Number |
Hard |
Dynamic_Programming, Math |
160 |
100.00 |
0963 |
Minimum Area Rectangle II |
Medium |
Array, Math, Geometry |
183 |
100.00 |
0962 |
Maximum Width Ramp |
Medium |
Array, Stack, Monotonic_Stack |
324 |
100.00 |
0961 |
N-Repeated Element in Size 2N Array |
Easy |
Array, Hash_Table |
264 |
75.00 |
0960 |
Delete Columns to Make Sorted III |
Hard |
Array, String, Dynamic_Programming |
200 |
100.00 |
0959 |
Regions Cut By Slashes |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Union_Find |
180 |
100.00 |
0958 |
Check Completeness of a Binary Tree |
Medium |
Breadth_First_Search, Tree, Binary_Tree |
142 |
96.04 |
0957 |
Prison Cells After N Days |
Medium |
Array, Hash_Table, Math, Bit_Manipulation |
172 |
100.00 |
0956 |
Tallest Billboard |
Hard |
Array, Dynamic_Programming |
182 |
100.00 |
0955 |
Delete Columns to Make Sorted II |
Medium |
Array, String, Greedy |
190 |
100.00 |
0954 |
Array of Doubled Pairs |
Medium |
Array, Hash_Table, Sorting, Greedy |
462 |
100.00 |
0953 |
Verifying an Alien Dictionary |
Easy |
Array, String, Hash_Table, Programming_Skills_I_Day_9_String |
137 |
100.00 |
0952 |
Largest Component Size by Common Factor |
Hard |
Array, Math, Union_Find |
538 |
100.00 |
0951 |
Flip Equivalent Binary Trees |
Medium |
Depth_First_Search, Tree, Binary_Tree |
150 |
100.00 |
0950 |
Reveal Cards In Increasing Order |
Medium |
Array, Sorting, Simulation, Queue |
176 |
100.00 |
0949 |
Largest Time for Given Digits |
Medium |
String, Enumeration |
171 |
100.00 |
0948 |
Bag of Tokens |
Medium |
Array, Sorting, Greedy, Two_Pointers |
161 |
100.00 |
0947 |
Most Stones Removed with Same Row or Column |
Medium |
Depth_First_Search, Graph, Union_Find, Level_2_Day_19_Union_Find |
200 |
100.00 |
0946 |
Validate Stack Sequences |
Medium |
Array, Stack, Simulation |
180 |
74.91 |
0945 |
Minimum Increment to Make Array Unique |
Medium |
Array, Sorting, Greedy, Counting |
427 |
100.00 |
0944 |
Delete Columns to Make Sorted |
Easy |
Array, String |
221 |
75.00 |
0943 |
Find the Shortest Superstring |
Hard |
Array, String, Dynamic_Programming, Bit_Manipulation, Bitmask |
1290 |
100.00 |
0942 |
DI String Match |
Easy |
Array, String, Math, Greedy, Two_Pointers |
202 |
80.00 |
0941 |
Valid Mountain Array |
Easy |
Array |
251 |
51.94 |
0940 |
Distinct Subsequences II |
Hard |
String, Dynamic_Programming |
177 |
100.00 |
0939 |
Minimum Area Rectangle |
Medium |
Array, Hash_Table, Math, Sorting, Geometry |
461 |
100.00 |
0938 |
Range Sum of BST |
Easy |
Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Udemy_Tree_Stack_Queue |
356 |
55.36 |
0937 |
Reorder Data in Log Files |
Medium |
Array, String, Sorting |
205 |
81.82 |
0936 |
Stamping The Sequence |
Hard |
String, Greedy, Stack, Queue |
196 |
100.00 |
0935 |
Knight Dialer |
Medium |
Dynamic_Programming |
160 |
100.00 |
0934 |
Shortest Bridge |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Graph_Theory_I_Day_6_Matrix_Related_Problems |
301 |
80.95 |
0933 |
Number of Recent Calls |
Easy |
Design, Queue, Data_Stream |
476 |
82.50 |
0932 |
Beautiful Array |
Medium |
Array, Math, Divide_and_Conquer |
145 |
100.00 |
0931 |
Minimum Falling Path Sum |
Medium |
Array, Dynamic_Programming, Matrix, Dynamic_Programming_I_Day_13 |
201 |
84.21 |
0930 |
Binary Subarrays With Sum |
Medium |
Array, Hash_Table, Prefix_Sum, Sliding_Window |
250 |
93.75 |
0929 |
Unique Email Addresses |
Easy |
Array, String, Hash_Table |
207 |
89.29 |
0928 |
Minimize Malware Spread II |
Hard |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find |
716 |
100.00 |
0927 |
Three Equal Parts |
Hard |
Array, Math |
303 |
100.00 |
0926 |
Flip String to Monotone Increasing |
Medium |
String, Dynamic_Programming |
199 |
100.00 |
0925 |
Long Pressed Name |
Easy |
String, Two_Pointers |
126 |
92.31 |
0924 |
Minimize Malware Spread |
Hard |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find |
791 |
100.00 |
0923 |
3Sum With Multiplicity |
Medium |
Array, Hash_Table, Sorting, Two_Pointers, Counting |
190 |
100.00 |
0922 |
Sort Array By Parity II |
Easy |
Array, Sorting, Two_Pointers |
257 |
87.50 |
0921 |
Minimum Add to Make Parentheses Valid |
Medium |
String, Greedy, Stack |
131 |
92.59 |
0920 |
Number of Music Playlists |
Hard |
Dynamic_Programming, Math, Combinatorics |
136 |
100.00 |
0919 |
Complete Binary Tree Inserter |
Medium |
Breadth_First_Search, Tree, Binary_Tree, Design |
225 |
100.00 |
0918 |
Maximum Sum Circular Subarray |
Medium |
Array, Dynamic_Programming, Divide_and_Conquer, Queue, Monotonic_Queue, Dynamic_Programming_I_Day_5 |
339 |
86.96 |
0917 |
Reverse Only Letters |
Easy |
String, Two_Pointers |
126 |
100.00 |
0916 |
Word Subsets |
Medium |
Array, String, Hash_Table |
397 |
88.89 |
0915 |
Partition Array into Disjoint Intervals |
Medium |
Array |
510 |
76.92 |
0914 |
X of a Kind in a Deck of Cards |
Easy |
Array, Hash_Table, Math, Counting, Number_Theory |
238 |
70.00 |
0913 |
Cat and Mouse |
Hard |
Dynamic_Programming, Math, Graph, Memoization, Topological_Sort, Game_Theory |
211 |
100.00 |
0912 |
Sort an Array |
Medium |
Array, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Merge_Sort, Bucket_Sort, Counting_Sort, Radix_Sort, Udemy_Sorting_Algorithms |
606 |
98.48 |
0911 |
Online Election |
Medium |
Array, Hash_Table, Binary_Search, Design, Binary_Search_II_Day_20 |
766 |
83.33 |
0910 |
Smallest Range II |
Medium |
Array, Math, Sorting, Greedy, Programming_Skills_II_Day_13 |
234 |
100.00 |
0909 |
Snakes and Ladders |
Medium |
Array, Breadth_First_Search, Matrix |
203 |
100.00 |
0908 |
Smallest Range I |
Easy |
Array, Math |
202 |
87.50 |
0907 |
Sum of Subarray Minimums |
Medium |
Array, Dynamic_Programming, Stack, Monotonic_Stack |
341 |
100.00 |
0906 |
Super Palindromes |
Hard |
Math, Enumeration |
153 |
100.00 |
0905 |
Sort Array By Parity |
Easy |
Array, Sorting, Two_Pointers |
219 |
75.00 |
0904 |
Fruit Into Baskets |
Medium |
Array, Hash_Table, Sliding_Window |
371 |
100.00 |
0903 |
Valid Permutations for DI Sequence |
Hard |
Dynamic_Programming |
140 |
100.00 |
0902 |
Numbers At Most N Given Digit Set |
Hard |
Array, Dynamic_Programming, Math, Binary_Search |
138 |
100.00 |
0901 |
Online Stock Span |
Medium |
Stack, Design, Monotonic_Stack, Data_Stream |
641 |
75.00 |
0900 |
RLE Iterator |
Medium |
Array, Design, Counting, Iterator |
175 |
83.33 |
0899 |
Orderly Queue |
Hard |
String, Math, Sorting |
148 |
100.00 |
0898 |
Bitwise ORs of Subarrays |
Medium |
Array, Dynamic_Programming, Bit_Manipulation |
812 |
100.00 |
0897 |
Increasing Order Search Tree |
Easy |
Depth_First_Search, Tree, Binary_Tree, Stack, Binary_Search_Tree |
128 |
85.71 |
0896 |
Monotonic Array |
Easy |
Array, Programming_Skills_II_Day_1 |
576 |
90.91 |
0895 |
Maximum Frequency Stack |
Hard |
Hash_Table, Stack, Design, Ordered_Set |
617 |
100.00 |
0894 |
All Possible Full Binary Trees |
Medium |
Dynamic_Programming, Tree, Binary_Tree, Recursion, Memoization |
257 |
100.00 |
0893 |
Groups of Special-Equivalent Strings |
Medium |
Array, String, Hash_Table |
141 |
100.00 |
0892 |
Surface Area of 3D Shapes |
Easy |
Array, Math, Matrix, Geometry |
180 |
100.00 |
0891 |
Sum of Subsequence Widths |
Hard |
Array, Math, Sorting |
481 |
100.00 |
0890 |
Find and Replace Pattern |
Medium |
Array, String, Hash_Table |
150 |
100.00 |
0889 |
Construct Binary Tree from Preorder and Postorder Traversal |
Medium |
Array, Hash_Table, Tree, Binary_Tree, Divide_and_Conquer |
168 |
100.00 |
0888 |
Fair Candy Swap |
Easy |
Array, Hash_Table, Sorting, Binary_Search |
318 |
100.00 |
0887 |
Super Egg Drop |
Hard |
Dynamic_Programming, Math, Binary_Search |
119 |
100.00 |
0886 |
Possible Bipartition |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Union_Find, Graph_Theory_I_Day_14_Graph_Theory |
397 |
100.00 |
0885 |
Spiral Matrix III |
Medium |
Array, Matrix, Simulation |
265 |
100.00 |
0884 |
Uncommon Words from Two Sentences |
Easy |
String, Hash_Table |
171 |
100.00 |
0883 |
Projection Area of 3D Shapes |
Easy |
Array, Math, Matrix, Geometry |
173 |
100.00 |
0882 |
Reachable Nodes In Subdivided Graph |
Hard |
Heap_Priority_Queue, Graph, Shortest_Path |
434 |
100.00 |
0881 |
Boats to Save People |
Medium |
Array, Sorting, Greedy, Two_Pointers |
370 |
96.07 |
0880 |
Decoded String at Index |
Medium |
String, Stack |
134 |
100.00 |
0879 |
Profitable Schemes |
Hard |
Array, Dynamic_Programming |
198 |
75.00 |
0878 |
Nth Magical Number |
Hard |
Math, Binary_Search |
124 |
100.00 |
0877 |
Stone Game |
Medium |
Array, Dynamic_Programming, Math, Game_Theory |
136 |
88.24 |
0876 |
Middle of the Linked List |
Easy |
Two_Pointers, Linked_List, Algorithm_I_Day_5_Two_Pointers, Programming_Skills_I_Day_10_Linked_List_and_Tree, Level_1_Day_4_Linked_List, Udemy_Linked_List |
136 |
76.52 |
0875 |
Koko Eating Bananas |
Medium |
Array, Binary_Search, Binary_Search_II_Day_4 |
267 |
93.85 |
0874 |
Walking Robot Simulation |
Medium |
Array, Simulation |
274 |
100.00 |
0873 |
Length of Longest Fibonacci Subsequence |
Medium |
Array, Hash_Table, Dynamic_Programming |
341 |
90.00 |
0872 |
Leaf-Similar Trees |
Easy |
Depth_First_Search, Tree, Binary_Tree |
140 |
100.00 |
0871 |
Minimum Number of Refueling Stops |
Hard |
Array, Dynamic_Programming, Greedy, Heap_Priority_Queue |
203 |
92.86 |
0870 |
Advantage Shuffle |
Medium |
Array, Sorting, Greedy |
698 |
100.00 |
0869 |
Reordered Power of 2 |
Medium |
Math, Sorting, Counting, Enumeration |
145 |
87.50 |
0868 |
Binary Gap |
Easy |
Bit_Manipulation |
142 |
100.00 |
0867 |
Transpose Matrix |
Easy |
Array, Matrix, Simulation |
201 |
100.00 |
0866 |
Prime Palindrome |
Medium |
Math |
143 |
100.00 |
0865 |
Smallest Subtree with all the Deepest Nodes |
Medium |
Hash_Table, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
147 |
100.00 |
0864 |
Shortest Path to Get All Keys |
Hard |
Breadth_First_Search, Bit_Manipulation |
176 |
100.00 |
0863 |
All Nodes Distance K in Binary Tree |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
147 |
95.83 |
0862 |
Shortest Subarray with Sum at Least K |
Hard |
Array, Binary_Search, Heap_Priority_Queue, Prefix_Sum, Sliding_Window, Queue, Monotonic_Queue |
563 |
84.62 |
0861 |
Score After Flipping Matrix |
Medium |
Array, Greedy, Matrix, Bit_Manipulation |
135 |
71.43 |
0860 |
Lemonade Change |
Easy |
Array, Greedy, Programming_Skills_II_Day_17 |
413 |
86.96 |
0859 |
Buddy Strings |
Easy |
String, Hash_Table |
149 |
91.01 |
0858 |
Mirror Reflection |
Medium |
Math, Geometry |
120 |
100.00 |
0857 |
Minimum Cost to Hire K Workers |
Hard |
Array, Sorting, Greedy, Heap_Priority_Queue |
302 |
100.00 |
0856 |
Score of Parentheses |
Medium |
String, Stack |
129 |
84.62 |
0855 |
Exam Room |
Medium |
Design, Ordered_Set |
644 |
83.33 |
0854 |
K-Similar Strings |
Hard |
String, Breadth_First_Search |
136 |
100.00 |
0853 |
Car Fleet |
Medium |
Array, Sorting, Stack, Monotonic_Stack |
757 |
85.29 |
0852 |
Peak Index in a Mountain Array |
Medium |
Array, Binary_Search, Binary_Search_I_Day_2 |
433 |
94.29 |
0851 |
Loud and Rich |
Medium |
Array, Depth_First_Search, Graph, Topological_Sort |
347 |
100.00 |
0850 |
Rectangle Area II |
Hard |
Array, Ordered_Set, Segment_Tree, Line_Sweep |
171 |
100.00 |
0849 |
Maximize Distance to Closest Person |
Medium |
Array |
196 |
88.46 |
0848 |
Shifting Letters |
Medium |
Array, String |
537 |
93.75 |
0847 |
Shortest Path Visiting All Nodes |
Hard |
Dynamic_Programming, Breadth_First_Search, Bit_Manipulation, Graph, Bitmask, Graph_Theory_I_Day_10_Standard_Traversal |
164 |
100.00 |
0846 |
Hand of Straights |
Medium |
Array, Hash_Table, Sorting, Greedy |
306 |
96.15 |
0845 |
Longest Mountain in Array |
Medium |
Array, Dynamic_Programming, Two_Pointers, Enumeration |
222 |
100.00 |
0844 |
Backspace String Compare |
Easy |
String, Two_Pointers, Stack, Simulation, Algorithm_II_Day_4_Two_Pointers, Level_1_Day_14_Stack |
126 |
98.31 |
0843 |
Guess the Word |
Hard |
Array, String, Math, Game_Theory, Interactive |
75 |
100.00 |
0842 |
Split Array into Fibonacci Sequence |
Medium |
String, Backtracking |
142 |
100.00 |
0841 |
Keys and Rooms |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Data_Structure_II_Day_19_Graph, Graph_Theory_I_Day_7_Standard_Traversal |
189 |
69.23 |
0840 |
Magic Squares In Grid |
Medium |
Array, Math, Matrix |
149 |
100.00 |
0839 |
Similar String Groups |
Hard |
Array, String, Depth_First_Search, Breadth_First_Search, Union_Find |
205 |
100.00 |
0838 |
Push Dominoes |
Medium |
String, Dynamic_Programming, Two_Pointers |
270 |
100.00 |
0837 |
New 21 Game |
Medium |
Dynamic_Programming, Math, Sliding_Window, Probability_and_Statistics |
144 |
75.00 |
0836 |
Rectangle Overlap |
Easy |
Math, Geometry |
121 |
100.00 |
0835 |
Image Overlap |
Medium |
Array, Matrix |
163 |
100.00 |
0834 |
Sum of Distances in Tree |
Hard |
Dynamic_Programming, Depth_First_Search, Tree, Graph |
746 |
100.00 |
0833 |
Find And Replace in String |
Medium |
Array, String, Sorting |
158 |
100.00 |
0832 |
Flipping an Image |
Easy |
Array, Matrix, Two_Pointers, Simulation |
190 |
94.44 |
0831 |
Masking Personal Information |
Medium |
String |
149 |
100.00 |
0830 |
Positions of Large Groups |
Easy |
String |
221 |
100.00 |
0829 |
Consecutive Numbers Sum |
Hard |
Math, Enumeration |
151 |
100.00 |
0828 |
Count Unique Characters of All Substrings of a Given String |
Hard |
String, Hash_Table, Dynamic_Programming |
216 |
100.00 |
0827 |
Making A Large Island |
Hard |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find |
985 |
100.00 |
0826 |
Most Profit Assigning Work |
Medium |
Array, Sorting, Greedy, Binary_Search, Two_Pointers, Binary_Search_II_Day_11 |
366 |
100.00 |
0825 |
Friends Of Appropriate Ages |
Medium |
Array, Sorting, Binary_Search, Two_Pointers |
278 |
100.00 |
0824 |
Goat Latin |
Easy |
String |
146 |
100.00 |
0823 |
Binary Trees With Factors |
Medium |
Array, Hash_Table, Dynamic_Programming |
298 |
100.00 |
0822 |
Card Flipping Game |
Medium |
Array, Hash_Table |
186 |
100.00 |
0821 |
Shortest Distance to a Character |
Easy |
Array, String, Two_Pointers |
168 |
88.00 |
0820 |
Short Encoding of Words |
Medium |
Array, String, Hash_Table, Trie |
231 |
100.00 |
0819 |
Most Common Word |
Easy |
String, Hash_Table, Counting |
211 |
83.33 |
0818 |
Race Car |
Hard |
Dynamic_Programming |
123 |
100.00 |
0817 |
Linked List Components |
Medium |
Hash_Table, Linked_List |
239 |
100.00 |
0816 |
Ambiguous Coordinates |
Medium |
String, Backtracking |
231 |
100.00 |
0815 |
Bus Routes |
Hard |
Array, Hash_Table, Breadth_First_Search, Level_2_Day_11_Graph/BFS/DFS |
429 |
100.00 |
0814 |
Binary Tree Pruning |
Medium |
Depth_First_Search, Tree, Binary_Tree |
127 |
100.00 |
0813 |
Largest Sum of Averages |
Medium |
Array, Dynamic_Programming |
160 |
100.00 |
0812 |
Largest Triangle Area |
Easy |
Array, Math, Geometry |
156 |
71.43 |
0811 |
Subdomain Visit Count |
Medium |
Array, String, Hash_Table, Counting |
220 |
100.00 |
0810 |
Chalkboard XOR Game |
Hard |
Array, Math, Bit_Manipulation, Game_Theory, Brainteaser |
172 |
100.00 |
0809 |
Expressive Words |
Medium |
Array, String, Two_Pointers |
158 |
100.00 |
0808 |
Soup Servings |
Medium |
Dynamic_Programming, Math, Probability_and_Statistics |
112 |
100.00 |
0807 |
Max Increase to Keep City Skyline |
Medium |
Array, Greedy, Matrix |
158 |
100.00 |
0806 |
Number of Lines To Write String |
Easy |
Array, String |
134 |
100.00 |
0805 |
Split Array With Same Average |
Hard |
Array, Dynamic_Programming, Math, Bit_Manipulation, Bitmask |
142 |
100.00 |
0804 |
Unique Morse Code Words |
Easy |
Array, String, Hash_Table |
158 |
80.00 |
0803 |
Bricks Falling When Hit |
Hard |
Array, Matrix, Union_Find |
742 |
100.00 |
0802 |
Find Eventual Safe States |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort, Graph_Theory_I_Day_9_Standard_Traversal |
511 |
100.00 |
0801 |
Minimum Swaps To Make Sequences Increasing |
Hard |
Array, Dynamic_Programming |
617 |
83.33 |
0799 |
Champagne Tower |
Medium |
Dynamic_Programming |
153 |
100.00 |
0798 |
Smallest Rotation with Highest Score |
Hard |
Array, Prefix_Sum |
470 |
100.00 |
0797 |
All Paths From Source to Target |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Backtracking, Algorithm_II_Day_8_Breadth_First_Search_Depth_First_Search, Graph_Theory_I_Day_7_Standard_Traversal |
232 |
100.00 |
0796 |
Rotate String |
Easy |
String, String_Matching |
134 |
100.00 |
0795 |
Number of Subarrays with Bounded Maximum |
Medium |
Array, Two_Pointers |
361 |
66.67 |
0794 |
Valid Tic-Tac-Toe State |
Medium |
Array, String |
138 |
100.00 |
0793 |
Preimage Size of Factorial Zeroes Function |
Hard |
Math, Binary_Search |
114 |
100.00 |
0792 |
Number of Matching Subsequences |
Medium |
String, Hash_Table, Sorting, Trie |
346 |
100.00 |
0791 |
Custom Sort String |
Medium |
String, Hash_Table, Sorting |
133 |
90.00 |
0790 |
Domino and Tromino Tiling |
Medium |
Dynamic_Programming |
116 |
100.00 |
0789 |
Escape The Ghosts |
Medium |
Array, Math |
187 |
100.00 |
0788 |
Rotated Digits |
Medium |
Dynamic_Programming, Math |
137 |
80.00 |
0787 |
Cheapest Flights Within K Stops |
Medium |
Dynamic_Programming, Depth_First_Search, Breadth_First_Search, Heap_Priority_Queue, Graph, Shortest_Path |
185 |
99.20 |
0786 |
K-th Smallest Prime Fraction |
Medium |
Array, Binary_Search, Heap_Priority_Queue |
165 |
100.00 |
0785 |
Is Graph Bipartite? |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Union_Find, Graph_Theory_I_Day_14_Graph_Theory |
215 |
82.35 |
0784 |
Letter Case Permutation |
Medium |
String, Bit_Manipulation, Backtracking, Algorithm_I_Day_11_Recursion_Backtracking |
219 |
84.62 |
0783 |
Minimum Distance Between BST Nodes |
Easy |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Binary_Search_Tree |
144 |
96.35 |
0782 |
Transform to Chessboard |
Hard |
Array, Math, Matrix, Bit_Manipulation |
188 |
100.00 |
0781 |
Rabbits in Forest |
Medium |
Array, Hash_Table, Math, Greedy |
132 |
100.00 |
0780 |
Reaching Points |
Hard |
Math |
139 |
100.00 |
0779 |
K-th Symbol in Grammar |
Medium |
Math, Bit_Manipulation, Recursion |
114 |
100.00 |
0778 |
Swim in Rising Water |
Hard |
Array, Depth_First_Search, Breadth_First_Search, Binary_Search, Matrix, Heap_Priority_Queue, Union_Find |
190 |
100.00 |
0777 |
Swap Adjacent in LR String |
Medium |
String, Two_Pointers |
188 |
100.00 |
0775 |
Global and Local Inversions |
Medium |
Array, Math |
495 |
100.00 |
0773 |
Sliding Puzzle |
Hard |
Array, Breadth_First_Search, Matrix |
166 |
100.00 |
0771 |
Jewels and Stones |
Easy |
String, Hash_Table |
143 |
99.08 |
0770 |
Basic Calculator IV |
Hard |
String, Hash_Table, Math, Stack, Recursion |
222 |
100.00 |
0769 |
Max Chunks To Make Sorted |
Medium |
Array, Sorting, Greedy, Stack, Monotonic_Stack |
136 |
90.00 |
0768 |
Max Chunks To Make Sorted II |
Hard |
Array, Sorting, Greedy, Stack, Monotonic_Stack |
202 |
100.00 |
0767 |
Reorganize String |
Medium |
String, Hash_Table, Sorting, Greedy, Heap_Priority_Queue, Counting |
148 |
100.00 |
0766 |
Toeplitz Matrix |
Easy |
Array, Matrix |
174 |
100.00 |
0765 |
Couples Holding Hands |
Hard |
Depth_First_Search, Greedy, Breadth_First_Search, Graph, Union_Find |
131 |
100.00 |
0764 |
Largest Plus Sign |
Medium |
Array, Dynamic_Programming |
415 |
100.00 |
0763 |
Partition Labels |
Medium |
String, Hash_Table, Greedy, Two_Pointers, Data_Structure_II_Day_7_String, Big_O_Time_O(n)_Space_O(1) |
235 |
84.75 |
0762 |
Prime Number of Set Bits in Binary Representation |
Easy |
Math, Bit_Manipulation |
147 |
100.00 |
0761 |
Special Binary String |
Hard |
String, Recursion |
128 |
100.00 |
0757 |
Set Intersection Size At Least Two |
Hard |
Array, Sorting, Greedy |
298 |
100.00 |
0756 |
Pyramid Transition Matrix |
Medium |
Depth_First_Search, Breadth_First_Search, Bit_Manipulation |
268 |
100.00 |
0754 |
Reach a Number |
Medium |
Math, Binary_Search |
134 |
100.00 |
0753 |
Cracking the Safe |
Hard |
Depth_First_Search, Graph, Eulerian_Circuit |
147 |
100.00 |
0752 |
Open the Lock |
Medium |
Array, String, Hash_Table, Breadth_First_Search, Graph_Theory_I_Day_12_Breadth_First_Search |
310 |
100.00 |
0749 |
Contain Virus |
Hard |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Simulation |
201 |
100.00 |
0748 |
Shortest Completing Word |
Easy |
Array, String, Hash_Table |
172 |
100.00 |
0747 |
Largest Number At Least Twice of Others |
Easy |
Array, Sorting |
147 |
98.21 |
0746 |
Min Cost Climbing Stairs |
Easy |
Array, Dynamic_Programming, Dynamic_Programming_I_Day_2, Level_1_Day_11_Dynamic_Programming |
171 |
96.76 |
0745 |
Prefix and Suffix Search |
Hard |
String, Design, Trie, Udemy_Trie_and_Heap |
1638 |
100.00 |
0744 |
Find Smallest Letter Greater Than Target |
Easy |
Array, Binary_Search, Binary_Search_I_Day_4 |
162 |
100.00 |
0743 |
Network Delay Time |
Medium |
Depth_First_Search, Breadth_First_Search, Heap_Priority_Queue, Graph, Shortest_Path |
321 |
98.55 |
0741 |
Cherry Pickup |
Hard |
Array, Dynamic_Programming, Matrix |
196 |
100.00 |
0740 |
Delete and Earn |
Medium |
Array, Hash_Table, Dynamic_Programming, Dynamic_Programming_I_Day_3 |
192 |
100.00 |
0739 |
Daily Temperatures |
Medium |
Top_100_Liked_Questions, Array, Stack, Monotonic_Stack, Programming_Skills_II_Day_6, Big_O_Time_O(n)_Space_O(n) |
936 |
80.54 |
0738 |
Monotone Increasing Digits |
Medium |
Math, Greedy |
127 |
100.00 |
0736 |
Parse Lisp Expression |
Hard |
String, Hash_Table, Stack, Recursion |
172 |
100.00 |
0735 |
Asteroid Collision |
Medium |
Array, Stack, Level_2_Day_18_Stack |
243 |
100.00 |
0733 |
Flood Fill |
Easy |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Algorithm_I_Day_7_Breadth_First_Search_Depth_First_Search, Graph_Theory_I_Day_1_Matrix_Related_Problems, Level_1_Day_9_Graph/BFS/DFS |
230 |
97.76 |
0732 |
My Calendar III |
Hard |
Binary_Search, Design, Ordered_Set, Segment_Tree |
294 |
100.00 |
0731 |
My Calendar II |
Medium |
Binary_Search, Design, Ordered_Set, Segment_Tree |
371 |
100.00 |
0730 |
Count Different Palindromic Subsequences |
Hard |
String, Dynamic_Programming |
233 |
100.00 |
0729 |
My Calendar I |
Medium |
Binary_Search, Design, Ordered_Set, Segment_Tree, Programming_Skills_II_Day_20 |
378 |
69.70 |
0728 |
Self Dividing Numbers |
Easy |
Math |
142 |
100.00 |
0726 |
Number of Atoms |
Hard |
String, Hash_Table, Sorting, Stack |
149 |
100.00 |
0725 |
Split Linked List in Parts |
Medium |
Linked_List |
162 |
95.00 |
0724 |
Find Pivot Index |
Easy |
Array, Prefix_Sum, Level_1_Day_1_Prefix_Sum |
255 |
88.92 |
0722 |
Remove Comments |
Medium |
Array, String |
164 |
100.00 |
0721 |
Accounts Merge |
Medium |
Array, String, Depth_First_Search, Breadth_First_Search, Union_Find |
364 |
100.00 |
0720 |
Longest Word in Dictionary |
Medium |
Array, String, Hash_Table, Sorting, Trie |
209 |
100.00 |
0719 |
Find K-th Smallest Pair Distance |
Hard |
Array, Sorting, Binary_Search, Two_Pointers |
172 |
100.00 |
0718 |
Maximum Length of Repeated Subarray |
Medium |
Array, Dynamic_Programming, Binary_Search, Sliding_Window, Hash_Function, Rolling_Hash |
270 |
91.43 |
0717 |
1-bit and 2-bit Characters |
Easy |
Array |
165 |
100.00 |
0715 |
Range Module |
Hard |
Design, Ordered_Set, Segment_Tree |
638 |
58.33 |
0714 |
Best Time to Buy and Sell Stock with Transaction Fee |
Medium |
Array, Dynamic_Programming, Greedy, Dynamic_Programming_I_Day_8 |
417 |
90.91 |
0713 |
Subarray Product Less Than K |
Medium |
Array, Sliding_Window, Algorithm_II_Day_5_Sliding_Window, Programming_Skills_II_Day_12, Udemy_Arrays |
336 |
92.11 |
0712 |
Minimum ASCII Delete Sum for Two Strings |
Medium |
String, Dynamic_Programming |
176 |
100.00 |
0710 |
Random Pick with Blacklist |
Hard |
Hash_Table, Math, Sorting, Binary_Search, Randomized |
632 |
100.00 |
0709 |
To Lower Case |
Easy |
String, Programming_Skills_I_Day_9_String |
142 |
98.68 |
0707 |
Design Linked List |
Medium |
Design, Linked_List, Data_Structure_II_Day_12_Linked_List, Programming_Skills_II_Day_19, Udemy_Linked_List |
243 |
100.00 |
0706 |
Design HashMap |
Easy |
Array, Hash_Table, Design, Linked_List, Hash_Function, Data_Structure_II_Day_2_Array |
405 |
92.11 |
0705 |
Design HashSet |
Easy |
Array, Hash_Table, Design, Linked_List, Hash_Function |
385 |
75.61 |
0704 |
Binary Search |
Easy |
Top_100_Liked_Questions, Array, Binary_Search, Algorithm_I_Day_1_Binary_Search, Binary_Search_I_Day_1, Level_1_Day_7_Binary_Search, Udemy_Binary_Search |
261 |
77.91 |
0703 |
Kth Largest Element in a Stream |
Easy |
Tree, Binary_Tree, Design, Heap_Priority_Queue, Binary_Search_Tree, Data_Stream |
286 |
95.45 |
0701 |
Insert into a Binary Search Tree |
Medium |
Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_I_Day_13_Tree, Udemy_Tree_Stack_Queue |
311 |
79.03 |
0700 |
Search in a Binary Search Tree |
Easy |
Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_I_Day_13_Tree |
251 |
88.31 |
0699 |
Falling Squares |
Hard |
Array, Ordered_Set, Segment_Tree |
293 |
100.00 |
0698 |
Partition to K Equal Sum Subsets |
Medium |
Array, Dynamic_Programming, Bit_Manipulation, Backtracking, Bitmask, Memoization |
191 |
100.00 |
0697 |
Degree of an Array |
Easy |
Array, Hash_Table, Udemy_Arrays |
289 |
84.62 |
0696 |
Count Binary Substrings |
Easy |
String, Two_Pointers |
222 |
100.00 |
0695 |
Max Area of Island |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Algorithm_I_Day_7_Breadth_First_Search_Depth_First_Search, Graph_Theory_I_Day_2_Matrix_Related_Problems |
181 |
93.83 |
0693 |
Binary Number with Alternating Bits |
Easy |
Bit_Manipulation |
129 |
100.00 |
0692 |
Top K Frequent Words |
Medium |
String, Hash_Table, Sorting, Heap_Priority_Queue, Counting, Trie, Bucket_Sort, Level_1_Day_15_Heap |
239 |
81.10 |
0691 |
Stickers to Spell Word |
Hard |
Array, String, Dynamic_Programming, Bit_Manipulation, Backtracking, Bitmask |
249 |
100.00 |
0690 |
Employee Importance |
Medium |
Hash_Table, Depth_First_Search, Breadth_First_Search |
255 |
100.00 |
0689 |
Maximum Sum of 3 Non-Overlapping Subarrays |
Hard |
Array, Dynamic_Programming |
248 |
100.00 |
0688 |
Knight Probability in Chessboard |
Medium |
Dynamic_Programming |
144 |
100.00 |
0687 |
Longest Univalue Path |
Medium |
Depth_First_Search, Tree, Binary_Tree |
303 |
100.00 |
0686 |
Repeated String Match |
Medium |
String, String_Matching |
164 |
100.00 |
0685 |
Redundant Connection II |
Hard |
Depth_First_Search, Breadth_First_Search, Graph, Union_Find |
176 |
100.00 |
0684 |
Redundant Connection |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Union_Find |
181 |
88.24 |
0682 |
Baseball Game |
Easy |
Array, Stack, Simulation |
159 |
100.00 |
0680 |
Valid Palindrome II |
Easy |
String, Greedy, Two_Pointers |
296 |
79.17 |
0679 |
24 Game |
Hard |
Array, Math, Backtracking |
175 |
100.00 |
0678 |
Valid Parenthesis String |
Medium |
String, Dynamic_Programming, Greedy, Stack |
133 |
100.00 |
0677 |
Map Sum Pairs |
Medium |
String, Hash_Table, Design, Trie |
197 |
80.00 |
0676 |
Implement Magic Dictionary |
Medium |
String, Hash_Table, Design, Trie |
256 |
100.00 |
0675 |
Cut Off Trees for Golf Event |
Hard |
Array, Breadth_First_Search, Matrix, Heap_Priority_Queue |
777 |
100.00 |
0674 |
Longest Continuous Increasing Subsequence |
Easy |
Array |
201 |
84.21 |
0673 |
Number of Longest Increasing Subsequence |
Medium |
Array, Dynamic_Programming, Segment_Tree, Binary_Indexed_Tree, Algorithm_II_Day_16_Dynamic_Programming |
226 |
91.67 |
0672 |
Bulb Switcher II |
Medium |
Math, Depth_First_Search, Breadth_First_Search, Bit_Manipulation |
131 |
100.00 |
0671 |
Second Minimum Node In a Binary Tree |
Easy |
Depth_First_Search, Tree, Binary_Tree |
128 |
100.00 |
0670 |
Maximum Swap |
Medium |
Math, Greedy |
143 |
100.00 |
0669 |
Trim a Binary Search Tree |
Medium |
Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree |
195 |
100.00 |
0668 |
Kth Smallest Number in Multiplication Table |
Hard |
Math, Binary_Search |
151 |
100.00 |
0667 |
Beautiful Arrangement II |
Medium |
Array, Math |
175 |
100.00 |
0665 |
Non-decreasing Array |
Medium |
Array |
256 |
85.71 |
0664 |
Strange Printer |
Hard |
String, Dynamic_Programming |
196 |
100.00 |
0662 |
Maximum Width of Binary Tree |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
189 |
75.00 |
0661 |
Image Smoother |
Easy |
Array, Matrix |
352 |
100.00 |
0659 |
Split Array into Consecutive Subsequences |
Medium |
Array, Hash_Table, Greedy, Heap_Priority_Queue |
352 |
100.00 |
0658 |
Find K Closest Elements |
Medium |
Array, Sorting, Binary_Search, Two_Pointers, Heap_Priority_Queue, Binary_Search_II_Day_2 |
375 |
95.16 |
0657 |
Robot Return to Origin |
Easy |
String, Simulation |
186 |
100.00 |
0655 |
Print Binary Tree |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
176 |
100.00 |
0654 |
Maximum Binary Tree |
Medium |
Array, Tree, Binary_Tree, Stack, Monotonic_Stack, Divide_and_Conquer |
271 |
90.00 |
0653 |
Two Sum IV - Input is a BST |
Easy |
Hash_Table, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Two_Pointers, Binary_Search_Tree, Data_Structure_I_Day_14_Tree |
231 |
96.08 |
0652 |
Find Duplicate Subtrees |
Medium |
Hash_Table, Depth_First_Search, Tree, Binary_Tree |
266 |
76.00 |
0650 |
2 Keys Keyboard |
Medium |
Dynamic_Programming, Math |
115 |
100.00 |
0649 |
Dota2 Senate |
Medium |
String, Greedy, Queue |
217 |
100.00 |
0648 |
Replace Words |
Medium |
Array, String, Hash_Table, Trie |
392 |
100.00 |
0647 |
Palindromic Substrings |
Medium |
String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n) |
266 |
67.83 |
0646 |
Maximum Length of Pair Chain |
Medium |
Array, Dynamic_Programming, Sorting, Greedy |
249 |
100.00 |
0645 |
Set Mismatch |
Easy |
Array, Hash_Table, Sorting, Bit_Manipulation |
246 |
88.46 |
0643 |
Maximum Average Subarray I |
Easy |
Array, Sliding_Window |
494 |
98.65 |
0641 |
Design Circular Deque |
Medium |
Array, Design, Linked_List, Queue |
232 |
100.00 |
0640 |
Solve the Equation |
Medium |
String, Math, Simulation |
170 |
66.67 |
0639 |
Decode Ways II |
Hard |
String, Dynamic_Programming |
259 |
100.00 |
0638 |
Shopping Offers |
Medium |
Array, Dynamic_Programming, Bit_Manipulation, Backtracking, Bitmask, Memoization |
195 |
100.00 |
0637 |
Average of Levels in Binary Tree |
Easy |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
249 |
100.00 |
0636 |
Exclusive Time of Functions |
Medium |
Array, Stack |
270 |
80.00 |
0633 |
Sum of Square Numbers |
Medium |
Math, Binary_Search, Two_Pointers, Binary_Search_I_Day_10 |
126 |
100.00 |
0632 |
Smallest Range Covering Elements from K Lists |
Hard |
Array, Hash_Table, Sorting, Greedy, Heap_Priority_Queue, Sliding_Window |
399 |
83.33 |
0630 |
Course Schedule III |
Hard |
Array, Greedy, Heap_Priority_Queue |
536 |
100.00 |
0629 |
K Inverse Pairs Array |
Hard |
Dynamic_Programming |
155 |
100.00 |
0628 |
Maximum Product of Three Numbers |
Easy |
Array, Math, Sorting |
276 |
97.30 |
0627 |
Swap Salary |
Easy |
Database, SQL_I_Day_2_Select_and_Order |
400 |
51.04 |
0626 |
Exchange Seats |
Medium |
Database |
502 |
50.56 |
0623 |
Add One Row to Tree |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
202 |
100.00 |
0622 |
Design Circular Queue |
Medium |
Array, Design, Linked_List, Queue, Programming_Skills_II_Day_20 |
234 |
92.68 |
0621 |
Task Scheduler |
Medium |
Array, Hash_Table, Sorting, Greedy, Heap_Priority_Queue, Counting, Level_2_Day_5_Greedy |
266 |
98.36 |
0620 |
Not Boring Movies |
Easy |
Database |
305 |
59.80 |
0619 |
Biggest Single Number |
Easy |
Database |
656 |
90.69 |
0617 |
Merge Two Binary Trees |
Easy |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Algorithm_I_Day_8_Breadth_First_Search_Depth_First_Search |
243 |
72.83 |
0611 |
Valid Triangle Number |
Medium |
Array, Sorting, Greedy, Binary_Search, Two_Pointers, Binary_Search_II_Day_1 |
203 |
100.00 |
0610 |
Triangle Judgement |
Easy |
Database |
464 |
72.35 |
0609 |
Find Duplicate File in System |
Medium |
Array, String, Hash_Table |
426 |
100.00 |
0608 |
Tree Node |
Medium |
LeetCode_Curated_SQL_70, Database, SQL_I_Day_4_Union_and_Select |
794 |
48.38 |
0607 |
Sales Person |
Easy |
LeetCode_Curated_SQL_70, Database, SQL_I_Day_6_Union |
2142 |
44.56 |
0606 |
Construct String from Binary Tree |
Medium |
String, Depth_First_Search, Tree, Binary_Tree |
187 |
100.00 |
0605 |
Can Place Flowers |
Easy |
Array, Greedy, Udemy_Arrays |
209 |
85.71 |
0602 |
Friend Requests II: Who Has the Most Friends |
Medium |
Database |
398 |
97.39 |
0601 |
Human Traffic of Stadium |
Hard |
Database |
529 |
51.80 |
0600 |
Non-negative Integers without Consecutive Ones |
Hard |
Dynamic_Programming |
142 |
100.00 |
0599 |
Minimum Index Sum of Two Lists |
Easy |
Array, String, Hash_Table |
293 |
100.00 |
0598 |
Range Addition II |
Easy |
Array, Math |
176 |
66.67 |
0596 |
Classes More Than 5 Students |
Easy |
Database |
484 |
50.92 |
0595 |
Big Countries |
Easy |
Database, SQL_I_Day_1_Select |
417 |
56.09 |
0594 |
Longest Harmonious Subsequence |
Easy |
Array, Hash_Table, Sorting |
331 |
100.00 |
0593 |
Valid Square |
Medium |
Math, Geometry |
161 |
83.33 |
0592 |
Fraction Addition and Subtraction |
Medium |
String, Math, Simulation |
164 |
100.00 |
0591 |
Tag Validator |
Hard |
String, Stack |
177 |
100.00 |
0590 |
N-ary Tree Postorder Traversal |
Easy |
Depth_First_Search, Tree, Stack |
237 |
88.10 |
0589 |
N-ary Tree Preorder Traversal |
Easy |
Depth_First_Search, Tree, Stack, Programming_Skills_I_Day_5_Function, Level_1_Day_6_Tree |
233 |
84.02 |
0587 |
Erect the Fence |
Hard |
Array, Math, Geometry |
470 |
100.00 |
0586 |
Customer Placing the Largest Number of Orders |
Easy |
LeetCode_Curated_SQL_70, Database, SQL_I_Day_8_Function |
768 |
44.85 |
0585 |
Investments in 2016 |
Medium |
Database |
729 |
99.22 |
0584 |
Find Customer Referee |
Easy |
Database, SQL_I_Day_1_Select |
779 |
43.48 |
0583 |
Delete Operation for Two Strings |
Medium |
String, Dynamic_Programming, Algorithm_II_Day_17_Dynamic_Programming |
197 |
100.00 |
0581 |
Shortest Unsorted Continuous Subarray |
Medium |
Array, Sorting, Greedy, Two_Pointers, Stack, Monotonic_Stack |
246 |
100.00 |
0577 |
Employee Bonus |
Easy |
Database |
1473 |
95.83 |
0576 |
Out of Boundary Paths |
Medium |
Dynamic_Programming |
153 |
100.00 |
0575 |
Distribute Candies |
Easy |
Array, Hash_Table |
538 |
76.92 |
0572 |
Subtree of Another Tree |
Easy |
Depth_First_Search, Tree, Binary_Tree, Hash_Function, String_Matching, Algorithm_II_Day_7_Breadth_First_Search_Depth_First_Search |
214 |
92.39 |
0570 |
Managers with at Least 5 Direct Reports |
Medium |
Database |
454 |
90.82 |
0567 |
Permutation in String |
Medium |
Top_100_Liked_Questions, String, Hash_Table, Two_Pointers, Sliding_Window, Algorithm_I_Day_6_Sliding_Window |
169 |
100.00 |
0566 |
Reshape the Matrix |
Easy |
Array, Matrix, Simulation, Data_Structure_I_Day_4_Array, Programming_Skills_I_Day_7_Array |
239 |
99.05 |
0565 |
Array Nesting |
Medium |
Array, Depth_First_Search |
553 |
100.00 |
0564 |
Find the Closest Palindrome |
Hard |
String, Math |
179 |
100.00 |
0563 |
Binary Tree Tilt |
Easy |
Depth_First_Search, Tree, Binary_Tree |
197 |
100.00 |
0561 |
Array Partition |
Easy |
Array, Sorting, Greedy, Counting_Sort |
337 |
90.48 |
0560 |
Subarray Sum Equals K |
Medium |
Top_100_Liked_Questions, Array, Hash_Table, Prefix_Sum, Data_Structure_II_Day_5_Array, Big_O_Time_O(n)_Space_O(n) |
692 |
53.27 |
0559 |
Maximum Depth of N-ary Tree |
Easy |
Depth_First_Search, Breadth_First_Search, Tree |
196 |
100.00 |
0558 |
Logical OR of Two Binary Grids Represented as Quad-Trees |
Medium |
Tree, Divide_and_Conquer |
268 |
100.00 |
0557 |
Reverse Words in a String III |
Easy |
String, Two_Pointers, Algorithm_I_Day_4_Two_Pointers |
215 |
98.10 |
0556 |
Next Greater Element III |
Medium |
String, Math, Two_Pointers, Programming_Skills_II_Day_10 |
137 |
80.00 |
0554 |
Brick Wall |
Medium |
Array, Hash_Table |
307 |
100.00 |
0553 |
Optimal Division |
Medium |
Array, Dynamic_Programming, Math |
154 |
100.00 |
0552 |
Student Attendance Record II |
Hard |
Dynamic_Programming |
151 |
100.00 |
0551 |
Student Attendance Record I |
Easy |
String |
151 |
95.00 |
0550 |
Game Play Analysis IV |
Medium |
Database |
762 |
97.74 |
0547 |
Number of Provinces |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Union_Find, Algorithm_II_Day_6_Breadth_First_Search_Depth_First_Search, Graph_Theory_I_Day_8_Standard_Traversal, Level_2_Day_19_Union_Find |
229 |
79.73 |
0546 |
Remove Boxes |
Hard |
Array, Dynamic_Programming, Memoization |
283 |
100.00 |
0543 |
Diameter of Binary Tree |
Easy |
Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Level_2_Day_7_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(n)_Space_O(n) |
307 |
43.93 |
0542 |
01 Matrix |
Medium |
Array, Dynamic_Programming, Breadth_First_Search, Matrix, Algorithm_I_Day_9_Breadth_First_Search_Depth_First_Search, Graph_Theory_I_Day_5_Matrix_Related_Problems |
441 |
94.06 |
0541 |
Reverse String II |
Easy |
String, Two_Pointers |
200 |
83.33 |
0540 |
Single Element in a Sorted Array |
Medium |
Array, Binary_Search, Binary_Search_II_Day_9 |
274 |
86.67 |
0539 |
Minimum Time Difference |
Medium |
Array, String, Math, Sorting |
183 |
100.00 |
0538 |
Convert BST to Greater Tree |
Medium |
Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree |
252 |
77.78 |
0537 |
Complex Number Multiplication |
Medium |
String, Math, Simulation |
171 |
75.00 |
0535 |
Encode and Decode TinyURL |
Medium |
String, Hash_Table, Design, Hash_Function |
183 |
81.25 |
0532 |
K-diff Pairs in an Array |
Medium |
Array, Hash_Table, Sorting, Binary_Search, Two_Pointers, Udemy_Arrays |
230 |
84.62 |
0530 |
Minimum Absolute Difference in BST |
Easy |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Binary_Search_Tree |
209 |
86.96 |
0529 |
Minesweeper |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix |
243 |
87.50 |
0528 |
Random Pick with Weight |
Medium |
Math, Binary_Search, Prefix_Sum, Randomized, Binary_Search_II_Day_13 |
393 |
91.38 |
0526 |
Beautiful Arrangement |
Medium |
Array, Dynamic_Programming, Bit_Manipulation, Backtracking, Bitmask |
107 |
100.00 |
0525 |
Contiguous Array |
Medium |
Array, Hash_Table, Prefix_Sum |
471 |
100.00 |
0524 |
Longest Word in Dictionary through Deleting |
Medium |
Array, String, Sorting, Two_Pointers |
307 |
100.00 |
0523 |
Continuous Subarray Sum |
Medium |
Array, Hash_Table, Math, Prefix_Sum |
682 |
95.45 |
0522 |
Longest Uncommon Subsequence II |
Medium |
Array, String, Hash_Table, Sorting, Two_Pointers |
163 |
100.00 |
0521 |
Longest Uncommon Subsequence I |
Easy |
String |
146 |
88.89 |
0520 |
Detect Capital |
Easy |
String |
161 |
84.54 |
0519 |
Random Flip Matrix |
Medium |
Hash_Table, Math, Randomized, Reservoir_Sampling |
270 |
100.00 |
0518 |
Coin Change II |
Medium |
Array, Dynamic_Programming, Dynamic_Programming_I_Day_20 |
139 |
100.00 |
0517 |
Super Washing Machines |
Hard |
Array, Greedy |
210 |
100.00 |
0516 |
Longest Palindromic Subsequence |
Medium |
String, Dynamic_Programming, Dynamic_Programming_I_Day_17 |
243 |
87.50 |
0515 |
Find Largest Value in Each Tree Row |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
238 |
73.33 |
0514 |
Freedom Trail |
Hard |
String, Dynamic_Programming, Depth_First_Search, Breadth_First_Search |
182 |
100.00 |
0513 |
Find Bottom Left Tree Value |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree |
190 |
88.24 |
0511 |
Game Play Analysis I |
Easy |
LeetCode_Curated_SQL_70, Database, SQL_I_Day_8_Function |
790 |
45.04 |
0509 |
Fibonacci Number |
Easy |
Dynamic_Programming, Math, Recursion, Memoization, Dynamic_Programming_I_Day_1, Level_1_Day_10_Dynamic_Programming, Udemy_Dynamic_Programming |
139 |
82.72 |
0508 |
Most Frequent Subtree Sum |
Medium |
Hash_Table, Depth_First_Search, Tree, Binary_Tree |
246 |
80.00 |
0507 |
Perfect Number |
Easy |
Math |
172 |
81.82 |
0506 |
Relative Ranks |
Easy |
Array, Sorting, Heap_Priority_Queue |
244 |
94.23 |
0504 |
Base 7 |
Easy |
Math |
136 |
100.00 |
0503 |
Next Greater Element II |
Medium |
Array, Stack, Monotonic_Stack, Programming_Skills_II_Day_10 |
331 |
92.68 |
0502 |
IPO |
Hard |
Array, Sorting, Greedy, Heap_Priority_Queue |
799 |
54.55 |
0501 |
Find Mode in Binary Search Tree |
Easy |
Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree |
235 |
86.67 |
0500 |
Keyboard Row |
Easy |
Array, String, Hash_Table |
170 |
85.19 |
0498 |
Diagonal Traverse |
Medium |
Array, Matrix, Simulation |
430 |
61.54 |
0497 |
Random Point in Non-overlapping Rectangles |
Medium |
Math, Binary_Search, Prefix_Sum, Ordered_Set, Randomized, Reservoir_Sampling |
759 |
100.00 |
0496 |
Next Greater Element I |
Easy |
Array, Hash_Table, Stack, Monotonic_Stack, Programming_Skills_I_Day_5_Function |
171 |
100.00 |
0495 |
Teemo Attacking |
Easy |
Array, Simulation |
283 |
100.00 |
0494 |
Target Sum |
Medium |
Array, Dynamic_Programming, Backtracking, Big_O_Time_O(n*(sum+s))_Space_O(n*(sum+s)) |
308 |
89.61 |
0493 |
Reverse Pairs |
Hard |
Array, Binary_Search, Ordered_Set, Divide_and_Conquer, Segment_Tree, Binary_Indexed_Tree, Merge_Sort |
887 |
66.67 |
0492 |
Construct the Rectangle |
Easy |
Math |
202 |
88.89 |
0491 |
Non-decreasing Subsequences |
Medium |
Array, Hash_Table, Bit_Manipulation, Backtracking |
499 |
100.00 |
0488 |
Zuma Game |
Hard |
String, Dynamic_Programming, Breadth_First_Search, Memoization |
1727 |
100.00 |
0486 |
Predict the Winner |
Medium |
Array, Dynamic_Programming, Math, Recursion, Game_Theory |
158 |
84.62 |
0485 |
Max Consecutive Ones |
Easy |
Array |
272 |
88.46 |
0483 |
Smallest Good Base |
Hard |
Math, Binary_Search |
164 |
100.00 |
0482 |
License Key Formatting |
Easy |
String |
234 |
87.18 |
0481 |
Magical String |
Medium |
String, Two_Pointers |
124 |
100.00 |
0480 |
Sliding Window Median |
Hard |
Array, Hash_Table, Heap_Priority_Queue, Sliding_Window |
409 |
100.00 |
0479 |
Largest Palindrome Product |
Hard |
Math |
147 |
100.00 |
0478 |
Generate Random Point in a Circle |
Medium |
Math, Geometry, Randomized, Rejection_Sampling |
862 |
100.00 |
0477 |
Total Hamming Distance |
Medium |
Array, Math, Bit_Manipulation |
298 |
100.00 |
0476 |
Number Complement |
Easy |
Bit_Manipulation |
133 |
100.00 |
0475 |
Heaters |
Medium |
Array, Sorting, Binary_Search, Two_Pointers |
356 |
87.50 |
0474 |
Ones and Zeroes |
Medium |
Array, String, Dynamic_Programming |
204 |
100.00 |
0473 |
Matchsticks to Square |
Medium |
Array, Dynamic_Programming, Bit_Manipulation, Backtracking, Bitmask |
255 |
100.00 |
0472 |
Concatenated Words |
Hard |
Array, String, Dynamic_Programming, Depth_First_Search, Trie |
484 |
100.00 |
0470 |
Implement Rand10() Using Rand7() |
Medium |
Math, Randomized, Probability_and_Statistics, Rejection_Sampling |
220 |
100.00 |
0468 |
Validate IP Address |
Medium |
String |
192 |
62.50 |
0467 |
Unique Substrings in Wraparound String |
Medium |
String, Dynamic_Programming |
197 |
100.00 |
0466 |
Count The Repetitions |
Hard |
String, Dynamic_Programming |
147 |
100.00 |
0464 |
Can I Win |
Medium |
Dynamic_Programming, Math, Bit_Manipulation, Bitmask, Memoization, Game_Theory |
213 |
100.00 |
0463 |
Island Perimeter |
Easy |
Array, Depth_First_Search, Breadth_First_Search, Matrix |
381 |
98.04 |
0462 |
Minimum Moves to Equal Array Elements II |
Medium |
Array, Math, Sorting |
210 |
100.00 |
0461 |
Hamming Distance |
Easy |
Bit_Manipulation, Udemy_Bit_Manipulation |
150 |
96.15 |
0460 |
LFU Cache |
Hard |
Hash_Table, Design, Linked_List, Doubly_Linked_List |
1143 |
100.00 |
0459 |
Repeated Substring Pattern |
Easy |
String, String_Matching, Programming_Skills_II_Day_2 |
201 |
100.00 |
0458 |
Poor Pigs |
Hard |
Dynamic_Programming, Math, Combinatorics |
133 |
80.00 |
0457 |
Circular Array Loop |
Medium |
Array, Hash_Table, Two_Pointers |
143 |
100.00 |
0456 |
132 Pattern |
Medium |
Array, Binary_Search, Stack, Ordered_Set, Monotonic_Stack, Udemy_Arrays |
434 |
100.00 |
0455 |
Assign Cookies |
Easy |
Array, Sorting, Greedy |
260 |
96.67 |
0454 |
4Sum II |
Medium |
Array, Hash_Table |
660 |
85.71 |
0453 |
Minimum Moves to Equal Array Elements |
Medium |
Array, Math |
282 |
100.00 |
0452 |
Minimum Number of Arrows to Burst Balloons |
Medium |
Array, Sorting, Greedy |
934 |
100.00 |
0451 |
Sort Characters By Frequency |
Medium |
String, Hash_Table, Sorting, Heap_Priority_Queue, Counting, Bucket_Sort, Data_Structure_II_Day_21_Heap_Priority_Queue |
288 |
81.72 |
0450 |
Delete Node in a BST |
Medium |
Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_II_Day_16_Tree |
257 |
84.62 |
0449 |
Serialize and Deserialize BST |
Medium |
String, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Design, Binary_Search_Tree |
233 |
100.00 |
0448 |
Find All Numbers Disappeared in an Array |
Easy |
Array, Hash_Table, Udemy_Arrays |
394 |
100.00 |
0447 |
Number of Boomerangs |
Medium |
Array, Hash_Table, Math |
308 |
100.00 |
0446 |
Arithmetic Slices II - Subsequence |
Hard |
Array, Dynamic_Programming |
312 |
100.00 |
0445 |
Add Two Numbers II |
Medium |
Math, Stack, Linked_List, Programming_Skills_II_Day_15, Udemy_Linked_List |
240 |
82.61 |
0443 |
String Compression |
Medium |
String, Two_Pointers |
198 |
92.68 |
0442 |
Find All Duplicates in an Array |
Medium |
Array, Hash_Table, Udemy_Arrays |
480 |
73.81 |
0441 |
Arranging Coins |
Easy |
Math, Binary_Search, Binary_Search_I_Day_6 |
150 |
84.21 |
0440 |
K-th Smallest in Lexicographical Order |
Hard |
Trie |
149 |
100.00 |
0438 |
Find All Anagrams in a String |
Medium |
Top_100_Liked_Questions, String, Hash_Table, Sliding_Window, Algorithm_II_Day_5_Sliding_Window, Programming_Skills_II_Day_12, Level_1_Day_12_Sliding_Window/Two_Pointer, Big_O_Time_O(n+m)_Space_O(1) |
561 |
54.68 |
0437 |
Path Sum III |
Medium |
Depth_First_Search, Tree, Binary_Tree, Level_2_Day_7_Tree, Big_O_Time_O(n)_Space_O(n) |
403 |
54.12 |
0436 |
Find Right Interval |
Medium |
Array, Sorting, Binary_Search, Binary_Search_II_Day_11 |
333 |
100.00 |
0435 |
Non-overlapping Intervals |
Medium |
Array, Dynamic_Programming, Sorting, Greedy, Data_Structure_II_Day_4_Array |
1040 |
85.07 |
0434 |
Number of Segments in a String |
Easy |
String |
167 |
80.00 |
0433 |
Minimum Genetic Mutation |
Medium |
String, Hash_Table, Breadth_First_Search, Graph_Theory_I_Day_12_Breadth_First_Search |
204 |
82.08 |
0432 |
All O`one Data Structure |
Hard |
Hash_Table, Design, Linked_List, Doubly_Linked_List |
1200 |
100.00 |
0430 |
Flatten a Multilevel Doubly Linked List |
Medium |
Depth_First_Search, Linked_List, Doubly_Linked_List |
194 |
97.44 |
0429 |
N-ary Tree Level Order Traversal |
Medium |
Breadth_First_Search, Tree, Programming_Skills_II_Day_9 |
248 |
75.86 |
0427 |
Construct Quad Tree |
Medium |
Array, Tree, Matrix, Divide_and_Conquer |
221 |
94.74 |
0424 |
Longest Repeating Character Replacement |
Medium |
String, Hash_Table, Sliding_Window, Level_1_Day_12_Sliding_Window/Two_Pointer |
288 |
84.38 |
0423 |
Reconstruct Original Digits from English |
Medium |
String, Hash_Table, Math |
349 |
100.00 |
0421 |
Maximum XOR of Two Numbers in an Array |
Medium |
Array, Hash_Table, Bit_Manipulation, Trie |
710 |
100.00 |
0420 |
Strong Password Checker |
Hard |
String, Greedy, Heap_Priority_Queue |
157 |
80.00 |
0419 |
Battleships in a Board |
Medium |
Array, Depth_First_Search, Matrix |
273 |
76.92 |
0417 |
Pacific Atlantic Water Flow |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Matrix, Graph_Theory_I_Day_4_Matrix_Related_Problems, Level_2_Day_10_Graph/BFS/DFS, Udemy_Graph |
319 |
100.00 |
0416 |
Partition Equal Subset Sum |
Medium |
Top_100_Liked_Questions, Array, Dynamic_Programming, Level_2_Day_13_Dynamic_Programming, Big_O_Time_O(n*sums)_Space_O(n*sums) |
204 |
98.82 |
0415 |
Add Strings |
Easy |
String, Math, Simulation, Data_Structure_II_Day_6_String |
296 |
76.00 |
0414 |
Third Maximum Number |
Easy |
Array, Sorting |
317 |
73.00 |
0413 |
Arithmetic Slices |
Medium |
Array, Dynamic_Programming, Algorithm_II_Day_14_Dynamic_Programming, Dynamic_Programming_I_Day_10 |
156 |
100.00 |
0412 |
Fizz Buzz |
Easy |
String, Math, Simulation, Udemy_Integers |
307 |
71.81 |
0410 |
Split Array Largest Sum |
Hard |
Array, Dynamic_Programming, Greedy, Binary_Search |
165 |
100.00 |
0409 |
Longest Palindrome |
Easy |
String, Hash_Table, Greedy, Data_Structure_II_Day_6_String, Level_1_Day_5_Greedy |
259 |
60.71 |
0407 |
Trapping Rain Water II |
Hard |
Array, Breadth_First_Search, Matrix, Heap_Priority_Queue |
500 |
100.00 |
0406 |
Queue Reconstruction by Height |
Medium |
Array, Sorting, Greedy, Segment_Tree, Binary_Indexed_Tree |
306 |
100.00 |
0405 |
Convert a Number to Hexadecimal |
Easy |
Math, Bit_Manipulation |
132 |
100.00 |
0404 |
Sum of Left Leaves |
Easy |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Programming_Skills_I_Day_10_Linked_List_and_Tree |
173 |
86.05 |
0403 |
Frog Jump |
Hard |
Array, Dynamic_Programming |
240 |
100.00 |
0402 |
Remove K Digits |
Medium |
String, Greedy, Stack, Monotonic_Stack |
375 |
75.00 |
0401 |
Binary Watch |
Easy |
Bit_Manipulation, Backtracking |
266 |
71.43 |
0400 |
Nth Digit |
Medium |
Math, Binary_Search |
271 |
50.00 |
0399 |
Evaluate Division |
Medium |
Array, Depth_First_Search, Breadth_First_Search, Graph, Union_Find, Shortest_Path |
183 |
91.49 |
0398 |
Random Pick Index |
Medium |
Hash_Table, Math, Randomized, Reservoir_Sampling |
1091 |
75.00 |
0397 |
Integer Replacement |
Medium |
Dynamic_Programming, Greedy, Bit_Manipulation, Memoization |
145 |
87.50 |
0396 |
Rotate Function |
Medium |
Array, Dynamic_Programming, Math |
571 |
87.50 |
0395 |
Longest Substring with At Least K Repeating Characters |
Medium |
String, Hash_Table, Sliding_Window, Divide_and_Conquer |
274 |
66.67 |
0394 |
Decode String |
Medium |
Top_100_Liked_Questions, String, Stack, Recursion, Level_1_Day_14_Stack, Udemy_Strings, Big_O_Time_O(n)_Space_O(n) |
224 |
64.86 |
0393 |
UTF-8 Validation |
Medium |
Array, Bit_Manipulation |
219 |
100.00 |
0392 |
Is Subsequence |
Easy |
String, Dynamic_Programming, Two_Pointers, Dynamic_Programming_I_Day_19, Level_1_Day_2_String, Udemy_Two_Pointers |
156 |
87.74 |
0391 |
Perfect Rectangle |
Hard |
Array, Line_Sweep |
897 |
100.00 |
0390 |
Elimination Game |
Medium |
Math, Recursion |
319 |
55.56 |
0389 |
Find the Difference |
Easy |
String, Hash_Table, Sorting, Bit_Manipulation, Programming_Skills_I_Day_8_String, Udemy_Bit_Manipulation |
256 |
64.81 |
0388 |
Longest Absolute File Path |
Medium |
String, Depth_First_Search, Stack |
150 |
100.00 |
0387 |
First Unique Character in a String |
Easy |
String, Hash_Table, Counting, Queue, Data_Structure_I_Day_6_String |
369 |
82.68 |
0386 |
Lexicographical Numbers |
Medium |
Depth_First_Search, Trie |
463 |
83.33 |
0385 |
Mini Parser |
Medium |
String, Depth_First_Search, Stack |
210 |
100.00 |
0384 |
Shuffle an Array |
Medium |
Array, Math, Randomized, Algorithm_II_Day_20_Others |
940 |
72.09 |
0383 |
Ransom Note |
Easy |
String, Hash_Table, Counting, Data_Structure_I_Day_6_String |
333 |
79.58 |
0382 |
Linked List Random Node |
Medium |
Math, Linked_List, Randomized, Reservoir_Sampling |
283 |
100.00 |
0381 |
Insert Delete GetRandom O(1) - Duplicates allowed |
Hard |
Array, Hash_Table, Math, Design, Randomized |
1313 |
50.00 |
0380 |
Insert Delete GetRandom O(1) |
Medium |
Array, Hash_Table, Math, Design, Randomized, Programming_Skills_II_Day_20 |
1326 |
68.23 |
0378 |
Kth Smallest Element in a Sorted Matrix |
Medium |
Array, Sorting, Binary_Search, Matrix, Heap_Priority_Queue |
522 |
59.78 |
0377 |
Combination Sum IV |
Medium |
Array, Dynamic_Programming, Dynamic_Programming_I_Day_21 |
217 |
72.41 |
0376 |
Wiggle Subsequence |
Medium |
Array, Dynamic_Programming, Greedy, Dynamic_Programming_I_Day_18 |
162 |
88.89 |
0375 |
Guess Number Higher or Lower II |
Medium |
Dynamic_Programming, Math, Game_Theory |
235 |
75.00 |
0374 |
Guess Number Higher or Lower |
Easy |
Binary_Search, Interactive, Binary_Search_I_Day_1 |
134 |
94.19 |
0373 |
Find K Pairs with Smallest Sums |
Medium |
Array, Heap_Priority_Queue |
1809 |
80.95 |
0372 |
Super Pow |
Medium |
Math, Divide_and_Conquer |
196 |
100.00 |
0371 |
Sum of Two Integers |
Medium |
Math, Bit_Manipulation, Udemy_Bit_Manipulation |
129 |
95.45 |
0368 |
Largest Divisible Subset |
Medium |
Array, Dynamic_Programming, Math, Sorting |
412 |
73.33 |
0367 |
Valid Perfect Square |
Easy |
Math, Binary_Search, Binary_Search_I_Day_3 |
137 |
94.55 |
0365 |
Water and Jug Problem |
Medium |
Math, Depth_First_Search, Breadth_First_Search, Graph_Theory_I_Day_11_Breadth_First_Search |
130 |
100.00 |
0363 |
Max Sum of Rectangle No Larger Than K |
Hard |
Array, Dynamic_Programming, Binary_Search, Matrix, Ordered_Set |
243 |
100.00 |
0357 |
Count Numbers with Unique Digits |
Medium |
Dynamic_Programming, Math, Backtracking |
104 |
100.00 |
0355 |
Design Twitter |
Medium |
Hash_Table, Design, Heap_Priority_Queue, Linked_List |
288 |
68.75 |
0354 |
Russian Doll Envelopes |
Hard |
Array, Dynamic_Programming, Sorting, Binary_Search |
788 |
100.00 |
0352 |
Data Stream as Disjoint Intervals |
Hard |
Binary_Search, Design, Ordered_Set |
905 |
75.00 |
0350 |
Intersection of Two Arrays II |
Easy |
Array, Hash_Table, Sorting, Binary_Search, Two_Pointers, Data_Structure_I_Day_3_Array, Binary_Search_I_Day_10 |
321 |
73.37 |
0349 |
Intersection of Two Arrays |
Easy |
Array, Hash_Table, Sorting, Binary_Search, Two_Pointers |
346 |
66.99 |
0347 |
Top K Frequent Elements |
Medium |
Top_100_Liked_Questions, Array, Hash_Table, Sorting, Heap_Priority_Queue, Counting, Divide_and_Conquer, Quickselect, Bucket_Sort, Data_Structure_II_Day_20_Heap_Priority_Queue, Big_O_Time_O(n*log(n))_Space_O(k) |
268 |
99.74 |
0345 |
Reverse Vowels of a String |
Easy |
String, Two_Pointers |
349 |
80.63 |
0344 |
Reverse String |
Easy |
String, Two_Pointers, Recursion, Algorithm_I_Day_4_Two_Pointers, Udemy_Strings |
445 |
69.75 |
0343 |
Integer Break |
Medium |
Dynamic_Programming, Math, Algorithm_II_Day_18_Dynamic_Programming, Dynamic_Programming_I_Day_21 |
218 |
63.89 |
0342 |
Power of Four |
Easy |
Math, Bit_Manipulation, Recursion |
150 |
92.11 |
0341 |
Flatten Nested List Iterator |
Medium |
Depth_First_Search, Tree, Stack, Design, Queue, Iterator, Programming_Skills_II_Day_18 |
210 |
100.00 |
0338 |
Counting Bits |
Easy |
Dynamic_Programming, Bit_Manipulation, Udemy_Bit_Manipulation, Big_O_Time_O(num)_Space_O(num) |
186 |
99.26 |
0337 |
House Robber III |
Medium |
Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree, Udemy_Tree_Stack_Queue |
282 |
84.62 |
0336 |
Palindrome Pairs |
Hard |
Array, String, Hash_Table, Trie |
2451 |
67.33 |
0335 |
Self Crossing |
Hard |
Array, Math, Geometry |
477 |
100.00 |
0334 |
Increasing Triplet Subsequence |
Medium |
Array, Greedy, Data_Structure_II_Day_5_Array |
672 |
60.61 |
0332 |
Reconstruct Itinerary |
Hard |
Depth_First_Search, Graph, Eulerian_Circuit |
240 |
93.88 |
0331 |
Verify Preorder Serialization of a Binary Tree |
Medium |
String, Tree, Binary_Tree, Stack |
335 |
70.00 |
0330 |
Patching Array |
Hard |
Array, Greedy |
201 |
100.00 |
0329 |
Longest Increasing Path in a Matrix |
Hard |
Dynamic_Programming, Depth_First_Search, Breadth_First_Search, Graph, Memoization, Topological_Sort |
322 |
92.65 |
0328 |
Odd Even Linked List |
Medium |
Linked_List, Level_2_Day_4_Linked_List, Udemy_Linked_List |
216 |
86.96 |
0327 |
Count of Range Sum |
Hard |
Array, Binary_Search, Ordered_Set, Divide_and_Conquer, Segment_Tree, Binary_Indexed_Tree, Merge_Sort |
638 |
100.00 |
0326 |
Power of Three |
Easy |
Math, Recursion |
413 |
76.12 |
0324 |
Wiggle Sort II |
Medium |
Array, Sorting, Divide_and_Conquer, Quickselect |
545 |
57.14 |
0322 |
Coin Change |
Medium |
Top_100_Liked_Questions, Array, Dynamic_Programming, Breadth_First_Search, Algorithm_II_Day_18_Dynamic_Programming, Dynamic_Programming_I_Day_20, Level_2_Day_12_Dynamic_Programming, Big_O_Time_O(m*n)_Space_O(amount) |
332 |
50.68 |
0321 |
Create Maximum Number |
Hard |
Greedy, Stack, Monotonic_Stack |
209 |
100.00 |
0319 |
Bulb Switcher |
Medium |
Math, Brainteaser |
214 |
77.78 |
0318 |
Maximum Product of Word Lengths |
Medium |
Array, String, Bit_Manipulation |
477 |
100.00 |
0316 |
Remove Duplicate Letters |
Medium |
String, Greedy, Stack, Monotonic_Stack |
291 |
81.82 |
0315 |
Count of Smaller Numbers After Self |
Hard |
Array, Binary_Search, Ordered_Set, Divide_and_Conquer, Segment_Tree, Binary_Indexed_Tree, Merge_Sort |
1282 |
88.46 |
0313 |
Super Ugly Number |
Medium |
Array, Dynamic_Programming, Math |
330 |
100.00 |
0312 |
Burst Balloons |
Hard |
Array, Dynamic_Programming |
210 |
100.00 |
0310 |
Minimum Height Trees |
Medium |
Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort |
521 |
97.56 |
0309 |
Best Time to Buy and Sell Stock with Cooldown |
Medium |
Array, Dynamic_Programming, Dynamic_Programming_I_Day_8 |
272 |
73.33 |
0307 |
Range Sum Query - Mutable |
Medium |
Array, Design, Segment_Tree, Binary_Indexed_Tree |
1729 |
78.79 |
0306 |
Additive Number |
Medium |
String, Backtracking |
261 |
63.16 |
0304 |
Range Sum Query 2D - Immutable |
Medium |
Array, Matrix, Design, Prefix_Sum, Dynamic_Programming_I_Day_14, Programming_Skills_II_Day_13, Udemy_2D_Arrays/Matrix |
1373 |
85.71 |
0303 |
Range Sum Query - Immutable |
Easy |
Array, Design, Prefix_Sum, Programming_Skills_I_Day_12_Class_and_Object |
472 |
63.64 |
0301 |
Remove Invalid Parentheses |
Hard |
String, Breadth_First_Search, Backtracking |
312 |
100.00 |
0300 |
Longest Increasing Subsequence |
Medium |
Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Algorithm_II_Day_16_Dynamic_Programming, Binary_Search_II_Day_3, Dynamic_Programming_I_Day_18, Udemy_Dynamic_Programming, Big_O_Time_O(n*log_n)_Space_O(n) |
318 |
82.28 |
0299 |
Bulls and Cows |
Medium |
String, Hash_Table, Counting, Level_1_Day_13_Hashmap |
254 |
84.82 |
0297 |
Serialize and Deserialize Binary Tree |
Hard |
String, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Design, Data_Structure_II_Day_18_Tree, Udemy_Tree_Stack_Queue |
475 |
78.85 |
0295 |
Find Median from Data Stream |
Hard |
Top_100_Liked_Questions, Sorting, Two_Pointers, Design, Heap_Priority_Queue, Data_Stream, Big_O_Time_O(n*log_n)_Space_O(n) |
2289 |
33.60 |
0292 |
Nim Game |
Easy |
Math, Game_Theory, Brainteaser |
129 |
94.29 |
0290 |
Word Pattern |
Easy |
String, Hash_Table, Data_Structure_II_Day_7_String |
177 |
89.55 |
0289 |
Game of Life |
Medium |
Array, Matrix, Simulation |
174 |
96.97 |
0287 |
Find the Duplicate Number |
Medium |
Top_100_Liked_Questions, Array, Binary_Search, Two_Pointers, Bit_Manipulation, Binary_Search_II_Day_5, Big_O_Time_O(n)_Space_O(n) |
656 |
66.21 |
0284 |
Peeking Iterator |
Medium |
Array, Design, Iterator |
286 |
62.50 |
0283 |
Move Zeroes |
Easy |
Top_100_Liked_Questions, Array, Two_Pointers, Algorithm_I_Day_3_Two_Pointers, Programming_Skills_I_Day_6_Array, Udemy_Arrays, Big_O_Time_O(n)_Space_O(1) |
516 |
79.07 |
0282 |
Expression Add Operators |
Hard |
String, Math, Backtracking |
367 |
85.71 |
0279 |
Perfect Squares |
Medium |
Dynamic_Programming, Math, Breadth_First_Search, Dynamic_Programming_I_Day_21 |
176 |
98.80 |
0278 |
First Bad Version |
Easy |
Binary_Search, Interactive, Algorithm_I_Day_1_Binary_Search, Binary_Search_I_Day_5, Level_1_Day_7_Binary_Search |
349 |
76.86 |
0275 |
H-Index II |
Medium |
Array, Binary_Search, Binary_Search_II_Day_8 |
398 |
81.82 |
0274 |
H-Index |
Medium |
Array, Sorting, Counting_Sort |
291 |
45.45 |
0273 |
Integer to English Words |
Hard |
String, Math, Recursion, Udemy_Strings |
273 |
82.93 |
0268 |
Missing Number |
Easy |
Array, Hash_Table, Math, Sorting, Binary_Search, Bit_Manipulation |
380 |
83.49 |
0264 |
Ugly Number II |
Medium |
Hash_Table, Dynamic_Programming, Math, Heap_Priority_Queue, Dynamic_Programming_I_Day_11 |
182 |
95.45 |
0263 |
Ugly Number |
Easy |
Math |
243 |
64.10 |
0262 |
Trips and Users |
Hard |
Database |
577 |
63.97 |
0260 |
Single Number III |
Medium |
Array, Bit_Manipulation |
222 |
100.00 |
0258 |
Add Digits |
Easy |
Math, Simulation, Number_Theory |
234 |
71.64 |
0257 |
Binary Tree Paths |
Easy |
String, Depth_First_Search, Tree, Binary_Tree, Backtracking |
320 |
72.84 |
0242 |
Valid Anagram |
Easy |
String, Hash_Table, Sorting, Data_Structure_I_Day_6_String, Programming_Skills_I_Day_11_Containers_and_Libraries, Udemy_Strings |
251 |
87.65 |
0241 |
Different Ways to Add Parentheses |
Medium |
String, Dynamic_Programming, Math, Recursion, Memoization |
294 |
73.47 |
0240 |
Search a 2D Matrix II |
Medium |
Top_100_Liked_Questions, Array, Binary_Search, Matrix, Divide_and_Conquer, Data_Structure_II_Day_4_Array, Binary_Search_II_Day_8, Big_O_Time_O(n+m)_Space_O(1) |
460 |
66.08 |
0239 |
Sliding Window Maximum |
Hard |
Top_100_Liked_Questions, Array, Heap_Priority_Queue, Sliding_Window, Queue, Monotonic_Queue, Udemy_Arrays, Big_O_Time_O(n*k)_Space_O(n+k) |
1059 |
86.14 |
0238 |
Product of Array Except Self |
Medium |
Top_100_Liked_Questions, Array, Prefix_Sum, Data_Structure_II_Day_5_Array, Udemy_Arrays, Big_O_Time_O(n^2)_Space_O(n) |
669 |
48.96 |
0237 |
Delete Node in a Linked List |
Medium |
Linked_List |
183 |
93.00 |
0236 |
Lowest Common Ancestor of a Binary Tree |
Medium |
Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Data_Structure_II_Day_18_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(n)_Space_O(n) |
386 |
45.21 |
0235 |
Lowest Common Ancestor of a Binary Search Tree |
Medium |
Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_I_Day_14_Tree, Level_1_Day_8_Binary_Search_Tree |
404 |
75.59 |
0234 |
Palindrome Linked List |
Easy |
Top_100_Liked_Questions, Two_Pointers, Stack, Linked_List, Recursion, Level_2_Day_3_Linked_List, Udemy_Linked_List, Big_O_Time_O(n)_Space_O(1) |
641 |
79.53 |
0233 |
Number of Digit One |
Hard |
Dynamic_Programming, Math, Recursion |
129 |
100.00 |
0232 |
Implement Queue using Stacks |
Easy |
Stack, Design, Queue, Data_Structure_I_Day_9_Stack_Queue, Programming_Skills_I_Day_11_Containers_and_Libraries, Level_2_Day_16_Design |
258 |
70.86 |
0231 |
Power of Two |
Easy |
Math, Bit_Manipulation, Recursion, Algorithm_I_Day_13_Bit_Manipulation |
161 |
86.81 |
0230 |
Kth Smallest Element in a BST |
Medium |
Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_II_Day_17_Tree, Level_2_Day_9_Binary_Search_Tree, Big_O_Time_O(n)_Space_O(n) |
393 |
33.33 |
0229 |
Majority Element II |
Medium |
Array, Hash_Table, Sorting, Counting |
408 |
71.21 |
0228 |
Summary Ranges |
Easy |
Array |
169 |
91.89 |
0227 |
Basic Calculator II |
Medium |
String, Math, Stack, Level_2_Day_18_Stack |
383 |
62.50 |
0226 |
Invert Binary Tree |
Easy |
Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_12_Tree, Level_2_Day_6_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(n)_Space_O(n) |
233 |
54.90 |
0225 |
Implement Stack using Queues |
Easy |
Stack, Design, Queue |
147 |
88.57 |
0224 |
Basic Calculator |
Hard |
String, Math, Stack, Recursion |
294 |
93.33 |
0223 |
Rectangle Area |
Medium |
Math, Geometry |
291 |
66.67 |
0222 |
Count Complete Tree Nodes |
|
|
|
|
0221 |
Maximal Square |
Medium |
Array, Dynamic_Programming, Matrix, Dynamic_Programming_I_Day_16, Big_O_Time_O(m*n)_Space_O(m*n) |
614 |
44.00 |
0220 |
Contains Duplicate III |
Hard |
Array, Sorting, Sliding_Window, Ordered_Set, Bucket_Sort |
921 |
72.22 |
0219 |
Contains Duplicate II |
Easy |
Array, Hash_Table, Sliding_Window |
813 |
80.46 |
0218 |
The Skyline Problem |
Hard |
Array, Heap_Priority_Queue, Ordered_Set, Divide_and_Conquer, Segment_Tree, Binary_Indexed_Tree, Line_Sweep |
365 |
93.14 |
0217 |
Contains Duplicate |
Easy |
Top_Interview_Questions, Array, Hash_Table, Sorting, Data_Structure_I_Day_1_Array, Programming_Skills_I_Day_11_Containers_and_Libraries, Udemy_Arrays |
719 |
73.49 |
0216 |
Combination Sum III |
Medium |
Array, Backtracking, Udemy_Backtracking/Recursion |
175 |
90.91 |
0215 |
Kth Largest Element in an Array |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Quickselect, Data_Structure_II_Day_20_Heap_Priority_Queue, Big_O_Time_O(n*log(n))_Space_O(log(n)) |
839 |
34.43 |
0214 |
Shortest Palindrome |
Hard |
String, Hash_Function, String_Matching, Rolling_Hash |
278 |
100.00 |
0213 |
House Robber II |
Medium |
Array, Dynamic_Programming, Algorithm_II_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_3, Udemy_Dynamic_Programming |
257 |
59.62 |
0212 |
Word Search II |
Hard |
Top_Interview_Questions, Array, String, Matrix, Backtracking, Trie |
268 |
100.00 |
0211 |
Design Add and Search Words Data Structure |
Medium |
String, Depth_First_Search, Design, Trie |
2256 |
87.04 |
0210 |
Course Schedule II |
Medium |
Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort, Level_2_Day_11_Graph/BFS/DFS |
266 |
96.32 |
0209 |
Minimum Size Subarray Sum |
Medium |
Array, Binary_Search, Prefix_Sum, Sliding_Window, Algorithm_II_Day_5_Sliding_Window, Binary_Search_II_Day_1 |
315 |
96.73 |
0208 |
Implement Trie (Prefix Tree) |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Design, Trie, Level_2_Day_16_Design, Udemy_Trie_and_Heap, Big_O_Time_O(word.length())_or_O(prefix.length())_Space_O(N) |
689 |
61.00 |
0207 |
Course Schedule |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort, Big_O_Time_O(N)_Space_O(N) |
183 |
92.07 |
0206 |
Reverse Linked List |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Data_Structure_I_Day_8_Linked_List, Algorithm_I_Day_10_Recursion_Backtracking, Level_1_Day_3_Linked_List, Udemy_Linked_List, Big_O_Time_O(N)_Space_O(1) |
279 |
45.78 |
0205 |
Isomorphic Strings |
Easy |
String, Hash_Table, Level_1_Day_2_String |
278 |
79.96 |
0204 |
Count Primes |
Medium |
Top_Interview_Questions, Array, Math, Enumeration, Number_Theory |
360 |
96.61 |
0203 |
Remove Linked List Elements |
Easy |
Linked_List, Recursion, Data_Structure_I_Day_7_Linked_List |
233 |
91.22 |
0202 |
Happy Number |
Easy |
Top_Interview_Questions, Hash_Table, Math, Two_Pointers, Algorithm_II_Day_21_Others, Programming_Skills_I_Day_4_Loop, Level_2_Day_1_Implementation/Simulation |
261 |
45.08 |
0201 |
Bitwise AND of Numbers Range |
Medium |
Bit_Manipulation, Algorithm_II_Day_19_Bit_Manipulation |
368 |
80.00 |
0200 |
Number of Islands |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Algorithm_II_Day_6_Breadth_First_Search_Depth_First_Search, Graph_Theory_I_Day_1_Matrix_Related_Problems, Level_1_Day_9_Graph/BFS/DFS, Udemy_Graph, Big_O_Time_O(M*N)_Space_O(M*N) |
252 |
95.41 |
0199 |
Binary Tree Right Side View |
Medium |
Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_II_Day_16_Tree, Level_2_Day_15_Tree |
194 |
92.89 |
0198 |
House Robber |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Algorithm_I_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_3, Level_2_Day_12_Dynamic_Programming, Udemy_Dynamic_Programming, Big_O_Time_O(n)_Space_O(n) |
156 |
92.24 |
0197 |
Rising Temperature |
Easy |
Database, SQL_I_Day_6_Union |
394 |
94.15 |
0196 |
Delete Duplicate Emails |
Easy |
Database, SQL_I_Day_2_Select_and_Order |
593 |
94.17 |
0195 |
Tenth Line |
Easy |
Shell |
36 |
87.50 |
0194 |
Transpose File |
Medium |
Shell |
461 |
33.47 |
0193 |
Valid Phone Numbers |
Easy |
Shell |
98 |
88.64 |
0192 |
Word Frequency |
Medium |
Shell |
96 |
80.40 |
0191 |
Number of 1 Bits |
Easy |
Top_Interview_Questions, Bit_Manipulation, Algorithm_I_Day_13_Bit_Manipulation, Programming_Skills_I_Day_2_Operator, Udemy_Bit_Manipulation |
237 |
68.44 |
0190 |
Reverse Bits |
Easy |
Top_Interview_Questions, Bit_Manipulation, Divide_and_Conquer, Algorithm_I_Day_14_Bit_Manipulation, Udemy_Bit_Manipulation |
198 |
81.82 |
0189 |
Rotate Array |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Two_Pointers, Algorithm_I_Day_2_Two_Pointers, Udemy_Arrays, Big_O_Time_O(n)_Space_O(1) |
483 |
86.95 |
0188 |
Best Time to Buy and Sell Stock IV |
Hard |
Array, Dynamic_Programming |
293 |
68.31 |
0187 |
Repeated DNA Sequences |
Medium |
String, Hash_Table, Bit_Manipulation, Sliding_Window, Hash_Function, Rolling_Hash, Data_Structure_II_Day_9_String, Udemy_Strings |
319 |
79.03 |
0185 |
Department Top Three Salaries |
Hard |
Database |
757 |
87.06 |
0184 |
Department Highest Salary |
Medium |
Database |
637 |
76.01 |
0183 |
Customers Who Never Order |
Easy |
Database, SQL_I_Day_1_Select |
712 |
33.67 |
0182 |
Duplicate Emails |
Easy |
Database, SQL_I_Day_10_Where |
396 |
68.40 |
0181 |
Employees Earning More Than Their Managers |
Easy |
Database |
351 |
94.75 |
0180 |
Consecutive Numbers |
Medium |
Database |
695 |
38.05 |
0179 |
Largest Number |
Medium |
Top_Interview_Questions, String, Sorting, Greedy |
187 |
100.00 |
0178 |
Rank Scores |
Medium |
Database |
292 |
85.14 |
0177 |
Nth Highest Salary |
Medium |
Database |
338 |
86.68 |
0176 |
Second Highest Salary |
Medium |
Database, SQL_I_Day_4_Union_and_Select |
219 |
92.54 |
0175 |
Combine Two Tables |
Easy |
Database, SQL_I_Day_5_Union |
473 |
54.97 |
0174 |
Dungeon Game |
Hard |
Array, Dynamic_Programming, Matrix |
300 |
66.67 |
0173 |
Binary Search Tree Iterator |
Medium |
Tree, Binary_Tree, Stack, Design, Binary_Search_Tree, Iterator, Data_Structure_II_Day_17_Tree, Programming_Skills_II_Day_16, Level_2_Day_9_Binary_Search_Tree |
563 |
46.91 |
0172 |
Factorial Trailing Zeroes |
Medium |
Top_Interview_Questions, Math, Udemy_Integers |
220 |
67.65 |
0171 |
Excel Sheet Column Number |
Easy |
Top_Interview_Questions, String, Math |
310 |
30.68 |
0169 |
Majority Element |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Counting, Divide_and_Conquer, Data_Structure_II_Day_1_Array, Udemy_Famous_Algorithm, Big_O_Time_O(n)_Space_O(1) |
460 |
51.25 |
0168 |
Excel Sheet Column Title |
Easy |
String, Math |
208 |
66.07 |
0167 |
Two Sum II - Input Array Is Sorted |
Medium |
Array, Binary_Search, Two_Pointers, Algorithm_I_Day_3_Two_Pointers, Binary_Search_I_Day_7 |
403 |
68.74 |
0166 |
Fraction to Recurring Decimal |
Medium |
Top_Interview_Questions, String, Hash_Table, Math |
147 |
90.91 |
0165 |
Compare Version Numbers |
Medium |
String, Two_Pointers |
144 |
100.00 |
0164 |
Maximum Gap |
Medium |
Array, Sorting, Bucket_Sort, Radix_Sort |
991 |
68.00 |
0162 |
Find Peak Element |
Medium |
Top_Interview_Questions, Array, Binary_Search, Algorithm_II_Day_2_Binary_Search, Binary_Search_II_Day_12 |
297 |
53.85 |
0160 |
Intersection of Two Linked Lists |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Data_Structure_II_Day_11_Linked_List, Udemy_Linked_List, Big_O_Time_O(M+N)_Space_O(1) |
262 |
83.50 |
0155 |
Min Stack |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Data_Structure_II_Day_14_Stack_Queue, Programming_Skills_II_Day_18, Level_2_Day_16_Design, Udemy_Design, Big_O_Time_O(1)_Space_O(N) |
331 |
84.88 |
0154 |
Find Minimum in Rotated Sorted Array II |
Hard |
Array, Binary_Search, Binary_Search_II_Day_13 |
275 |
84.00 |
0153 |
Find Minimum in Rotated Sorted Array |
Medium |
Top_100_Liked_Questions, Array, Binary_Search, Algorithm_II_Day_2_Binary_Search, Binary_Search_I_Day_12, Udemy_Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N) |
262 |
60.96 |
0152 |
Maximum Product Subarray |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Dynamic_Programming_I_Day_6, Level_2_Day_13_Dynamic_Programming, Udemy_Dynamic_Programming, Big_O_Time_O(N)_Space_O(1) |
253 |
88.42 |
0151 |
Reverse Words in a String |
Medium |
String, Two_Pointers, Udemy_Strings |
206 |
98.90 |
0150 |
Evaluate Reverse Polish Notation |
Medium |
Top_Interview_Questions, Array, Math, Stack, Programming_Skills_II_Day_3 |
233 |
88.82 |
0149 |
Max Points on a Line |
Hard |
Top_Interview_Questions, Array, Hash_Table, Math, Geometry, Algorithm_II_Day_21_Others |
307 |
83.33 |
0148 |
Sort List |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Sorting, Two_Pointers, Linked_List, Divide_and_Conquer, Merge_Sort, Level_2_Day_4_Linked_List, Big_O_Time_O(log(N))_Space_O(log(N)) |
820 |
61.70 |
0147 |
Insertion Sort List |
Medium |
Sorting, Linked_List |
385 |
52.00 |
0146 |
LRU Cache |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Design, Linked_List, Doubly_Linked_List, Udemy_Linked_List, Big_O_Time_O(1)_Space_O(capacity) |
1116 |
97.93 |
0145 |
Binary Tree Postorder Traversal |
Easy |
Depth_First_Search, Tree, Binary_Tree, Stack, Data_Structure_I_Day_10_Tree, Udemy_Tree_Stack_Queue |
211 |
80.00 |
0144 |
Binary Tree Preorder Traversal |
Easy |
Depth_First_Search, Tree, Binary_Tree, Stack, Data_Structure_I_Day_10_Tree, Udemy_Tree_Stack_Queue |
277 |
37.90 |
0143 |
Reorder List |
Medium |
Two_Pointers, Stack, Linked_List, Recursion, Data_Structure_II_Day_13_Linked_List, Programming_Skills_II_Day_14 |
395 |
82.26 |
0142 |
Linked List Cycle II |
Medium |
Top_100_Liked_Questions, Hash_Table, Two_Pointers, Linked_List, Data_Structure_II_Day_10_Linked_List, Level_1_Day_4_Linked_List, Udemy_Linked_List, Big_O_Time_O(N)_Space_O(1) |
192 |
63.39 |
0141 |
Linked List Cycle |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Data_Structure_I_Day_7_Linked_List, Udemy_Linked_List, Big_O_Time_O(N)_Space_O(1) |
223 |
91.85 |
0140 |
Word Break II |
Hard |
Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Backtracking, Trie, Memoization |
287 |
44.19 |
0139 |
Word Break |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Algorithm_II_Day_15_Dynamic_Programming, Dynamic_Programming_I_Day_9, Udemy_Dynamic_Programming, Big_O_Time_O(M+max*N)_Space_O(M+N+max) |
197 |
87.17 |
0138 |
Copy List with Random Pointer |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Linked_List, Programming_Skills_II_Day_14, Udemy_Linked_List, Big_O_Time_O(N)_Space_O(N) |
274 |
80.58 |
0137 |
Single Number II |
Medium |
Array, Bit_Manipulation |
344 |
64.29 |
0136 |
Single Number |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Data_Structure_II_Day_1_Array, Algorithm_I_Day_14_Bit_Manipulation, Udemy_Integers, Big_O_Time_O(N)_Space_O(1) |
344 |
83.63 |
0135 |
Candy |
Hard |
Array, Greedy |
466 |
58.33 |
0134 |
Gas Station |
Medium |
Top_Interview_Questions, Array, Greedy |
545 |
70.18 |
0133 |
Clone Graph |
Medium |
Hash_Table, Depth_First_Search, Breadth_First_Search, Graph, Udemy_Graph |
351 |
60.91 |
0132 |
Palindrome Partitioning II |
Hard |
String, Dynamic_Programming |
290 |
100.00 |
0131 |
Palindrome Partitioning |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Big_O_Time_O(N*2^N)_Space_O(2^N*N) |
820 |
87.27 |
0130 |
Surrounded Regions |
Medium |
Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Algorithm_II_Day_8_Breadth_First_Search_Depth_First_Search |
355 |
84.42 |
0129 |
Sum Root to Leaf Numbers |
Medium |
Depth_First_Search, Tree, Binary_Tree |
237 |
52.50 |
0128 |
Longest Consecutive Sequence |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Union_Find, Big_O_Time_O(N_log_N)_Space_O(1) |
460 |
97.77 |
0127 |
Word Ladder |
Hard |
Top_Interview_Questions, String, Hash_Table, Breadth_First_Search, Graph_Theory_I_Day_12_Breadth_First_Search |
396 |
98.68 |
0126 |
Word Ladder II |
Hard |
String, Hash_Table, Breadth_First_Search, Backtracking |
418 |
51.45 |
0125 |
Valid Palindrome |
Easy |
Top_Interview_Questions, String, Two_Pointers, Udemy_Two_Pointers |
353 |
52.06 |
0124 |
Binary Tree Maximum Path Sum |
Hard |
Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(N)_Space_O(N) |
331 |
74.42 |
0123 |
Best Time to Buy and Sell Stock III |
Hard |
Array, Dynamic_Programming |
585 |
95.24 |
0122 |
Best Time to Buy and Sell Stock II |
Medium |
Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Dynamic_Programming_I_Day_7, Udemy_Arrays |
197 |
95.10 |
0121 |
Best Time to Buy and Sell Stock |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Data_Structure_I_Day_3_Array, Dynamic_Programming_I_Day_7, Level_1_Day_5_Greedy, Udemy_Arrays, Big_O_Time_O(N)_Space_O(1) |
609 |
94.06 |
0120 |
Triangle |
Medium |
Array, Dynamic_Programming, Algorithm_I_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_13, Udemy_Dynamic_Programming |
194 |
97.87 |
0119 |
Pascal’s Triangle II |
Easy |
Array, Dynamic_Programming, Data_Structure_II_Day_3_Array, Dynamic_Programming_I_Day_12, Udemy_Dynamic_Programming |
157 |
97.27 |
0118 |
Pascal’s Triangle |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Data_Structure_I_Day_4_Array, Dynamic_Programming_I_Day_12, Udemy_Dynamic_Programming |
277 |
33.22 |
0117 |
Populating Next Right Pointers in Each Node II |
Medium |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Linked_List, Algorithm_II_Day_7_Breadth_First_Search_Depth_First_Search |
199 |
94.67 |
0116 |
Populating Next Right Pointers in Each Node |
Medium |
Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Linked_List, Algorithm_I_Day_8_Breadth_First_Search_Depth_First_Search |
355 |
69.02 |
0115 |
Distinct Subsequences |
Hard |
String, Dynamic_Programming |
285 |
88.89 |
0114 |
Flatten Binary Tree to Linked List |
Medium |
Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Linked_List, Udemy_Linked_List, Big_O_Time_O(N)_Space_O(N) |
191 |
93.10 |
0113 |
Path Sum II |
Medium |
Depth_First_Search, Tree, Binary_Tree, Backtracking, Data_Structure_II_Day_16_Tree |
364 |
78.67 |
0112 |
Path Sum |
Easy |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_12_Tree |
322 |
36.41 |
0111 |
Minimum Depth of Binary Tree |
Easy |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Udemy_Tree_Stack_Queue |
525 |
90.51 |
0110 |
Balanced Binary Tree |
Easy |
Depth_First_Search, Tree, Binary_Tree, Programming_Skills_II_Day_2, Level_2_Day_6_Tree, Udemy_Tree_Stack_Queue |
182 |
71.30 |
0109 |
Convert Sorted List to Binary Search Tree |
Medium |
Tree, Binary_Tree, Linked_List, Binary_Search_Tree, Divide_and_Conquer |
191 |
100.00 |
0108 |
Convert Sorted Array to Binary Search Tree |
Easy |
Top_Interview_Questions, Array, Tree, Binary_Tree, Binary_Search_Tree, Divide_and_Conquer, Data_Structure_II_Day_15_Tree, Level_2_Day_9_Binary_Search_Tree, Udemy_Tree_Stack_Queue |
167 |
80.29 |
0107 |
Binary Tree Level Order Traversal II |
Medium |
Breadth_First_Search, Tree, Binary_Tree |
187 |
87.50 |
0106 |
Construct Binary Tree from Inorder and Postorder Traversal |
Medium |
Array, Hash_Table, Tree, Binary_Tree, Divide_and_Conquer |
167 |
100.00 |
0105 |
Construct Binary Tree from Preorder and Inorder Traversal |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Tree, Binary_Tree, Divide_and_Conquer, Data_Structure_II_Day_15_Tree, Big_O_Time_O(N)_Space_O(N) |
183 |
95.45 |
0104 |
Maximum Depth of Binary Tree |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_11_Tree, Programming_Skills_I_Day_10_Linked_List_and_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(N)_Space_O(H) |
166 |
83.53 |
0103 |
Binary Tree Zigzag Level Order Traversal |
Medium |
Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_II_Day_15_Tree, Udemy_Tree_Stack_Queue |
176 |
71.62 |
0102 |
Binary Tree Level Order Traversal |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_11_Tree, Level_1_Day_6_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(N)_Space_O(N) |
198 |
95.14 |
0101 |
Symmetric Tree |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_11_Tree, Level_2_Day_15_Tree, Big_O_Time_O(N)_Space_O(log(N)) |
153 |
82.35 |
0100 |
Same Tree |
Easy |
Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Level_2_Day_15_Tree, Udemy_Tree_Stack_Queue |
134 |
86.63 |
0099 |
Recover Binary Search Tree |
Medium |
Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree |
221 |
90.00 |
0098 |
Validate Binary Search Tree |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_I_Day_14_Tree, Level_1_Day_8_Binary_Search_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(N)_Space_O(log(N)) |
190 |
61.62 |
0097 |
Interleaving String |
Medium |
String, Dynamic_Programming |
149 |
81.58 |
0096 |
Unique Binary Search Trees |
Medium |
Dynamic_Programming, Math, Tree, Binary_Tree, Binary_Search_Tree, Dynamic_Programming_I_Day_11, Big_O_Time_O(n)_Space_O(1) |
116 |
92.31 |
0095 |
Unique Binary Search Trees II |
Medium |
Dynamic_Programming, Tree, Binary_Tree, Backtracking, Binary_Search_Tree |
167 |
100.00 |
0094 |
Binary Tree Inorder Traversal |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Data_Structure_I_Day_10_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(n)_Space_O(n) |
152 |
66.67 |
0093 |
Restore IP Addresses |
Medium |
String, Backtracking |
152 |
100.00 |
0092 |
Reverse Linked List II |
Medium |
Linked_List |
144 |
75.00 |
0091 |
Decode Ways |
Medium |
Top_Interview_Questions, String, Dynamic_Programming, Algorithm_II_Day_15_Dynamic_Programming, Dynamic_Programming_I_Day_10 |
148 |
79.07 |
0090 |
Subsets II |
Medium |
Array, Bit_Manipulation, Backtracking, Algorithm_II_Day_9_Recursion_Backtracking |
200 |
88.33 |
0089 |
Gray Code |
Medium |
Math, Bit_Manipulation, Backtracking |
271 |
69.23 |
0088 |
Merge Sorted Array |
Easy |
Top_Interview_Questions, Array, Sorting, Two_Pointers, Data_Structure_I_Day_2_Array |
170 |
69.74 |
0087 |
Scramble String |
Hard |
String, Dynamic_Programming |
174 |
87.50 |
0086 |
Partition List |
Medium |
Two_Pointers, Linked_List |
160 |
70.73 |
0085 |
Maximal Rectangle |
Hard |
Array, Dynamic_Programming, Matrix, Stack, Monotonic_Stack |
209 |
100.00 |
0084 |
Largest Rectangle in Histogram |
Hard |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Stack, Monotonic_Stack, Big_O_Time_O(n_log_n)_Space_O(log_n) |
476 |
90.79 |
0083 |
Remove Duplicates from Sorted List |
Easy |
Linked_List, Data_Structure_I_Day_8_Linked_List |
173 |
82.42 |
0082 |
Remove Duplicates from Sorted List II |
Medium |
Two_Pointers, Linked_List, Data_Structure_II_Day_11_Linked_List, Algorithm_II_Day_3_Two_Pointers |
166 |
89.47 |
0081 |
Search in Rotated Sorted Array II |
Medium |
Array, Binary_Search, Binary_Search_II_Day_12 |
170 |
96.30 |
0080 |
Remove Duplicates from Sorted Array II |
Medium |
Array, Two_Pointers, Udemy_Arrays |
192 |
80.67 |
0079 |
Word Search |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Big_O_Time_O(4^(m*n))_Space_O(m*n) |
392 |
72.92 |
0078 |
Subsets |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Backtracking, Algorithm_II_Day_9_Recursion_Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(2^n)_Space_O(n*2^n) |
171 |
94.92 |
0077 |
Combinations |
Medium |
Backtracking, Algorithm_I_Day_11_Recursion_Backtracking |
232 |
100.00 |
0076 |
Minimum Window Substring |
Hard |
Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Level_2_Day_14_Sliding_Window/Two_Pointer, Big_O_Time_O(s.length())_Space_O(1) |
191 |
96.38 |
0075 |
Sort Colors |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Data_Structure_II_Day_2_Array, Udemy_Arrays, Big_O_Time_O(n)_Space_O(1) |
164 |
64.43 |
0074 |
Search a 2D Matrix |
Medium |
Top_100_Liked_Questions, Array, Binary_Search, Matrix, Data_Structure_I_Day_5_Array, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_8, Level_2_Day_8_Binary_Search, Udemy_2D_Arrays/Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1) |
159 |
74.46 |
0073 |
Set Matrix Zeroes |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Matrix, Udemy_2D_Arrays/Matrix, Big_O_Time_O(m*n)_Space_O(1) |
248 |
97.33 |
0072 |
Edit Distance |
Medium |
Top_100_Liked_Questions, String, Dynamic_Programming, Algorithm_II_Day_18_Dynamic_Programming, Dynamic_Programming_I_Day_19, Udemy_Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n2) |
182 |
92.16 |
0071 |
Simplify Path |
Medium |
String, Stack |
185 |
92.86 |
0070 |
Climbing Stairs |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Algorithm_I_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_2, Level_1_Day_10_Dynamic_Programming, Udemy_Dynamic_Programming, Big_O_Time_O(n)_Space_O(n) |
124 |
71.98 |
0069 |
Sqrt(x) |
Easy |
Top_Interview_Questions, Math, Binary_Search, Binary_Search_I_Day_4 |
140 |
94.72 |
0068 |
Text Justification |
Hard |
Array, String, Simulation |
153 |
92.96 |
0067 |
Add Binary |
Easy |
String, Math, Bit_Manipulation, Simulation, Programming_Skills_II_Day_5 |
164 |
90.60 |
0066 |
Plus One |
Easy |
Top_Interview_Questions, Array, Math, Programming_Skills_II_Day_3, Udemy_Arrays |
148 |
98.75 |
0065 |
Valid Number |
Hard |
String |
151 |
100.00 |
0064 |
Minimum Path Sum |
Medium |
Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Dynamic_Programming_I_Day_16, Udemy_Dynamic_Programming, Big_O_Time_O(m*n)_Space_O(m*n) |
164 |
100.00 |
0063 |
Unique Paths II |
Medium |
Array, Dynamic_Programming, Matrix, Dynamic_Programming_I_Day_15 |
151 |
81.94 |
0062 |
Unique Paths |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Combinatorics, Algorithm_II_Day_13_Dynamic_Programming, Dynamic_Programming_I_Day_15, Level_1_Day_11_Dynamic_Programming, Big_O_Time_O(m*n)_Space_O(m*n) |
118 |
94.65 |
0061 |
Rotate List |
Medium |
Two_Pointers, Linked_List, Programming_Skills_II_Day_16, Udemy_Linked_List |
160 |
92.22 |
0060 |
Permutation Sequence |
Hard |
Math, Recursion |
132 |
100.00 |
0059 |
Spiral Matrix II |
Medium |
Array, Matrix, Simulation, Data_Structure_II_Day_3_Array |
153 |
41.70 |
0058 |
Length of Last Word |
Easy |
String, Programming_Skills_II_Day_6, Udemy_Arrays |
135 |
93.67 |
0057 |
Insert Interval |
Medium |
Array, Level_2_Day_17_Interval |
249 |
75.63 |
0056 |
Merge Intervals |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Data_Structure_II_Day_2_Array, Level_2_Day_17_Interval, Udemy_2D_Arrays/Matrix, Big_O_Time_O(n_log_n)_Space_O(n) |
334 |
80.67 |
0055 |
Jump Game |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Algorithm_II_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_4, Udemy_Arrays, Big_O_Time_O(n)_Space_O(1) |
332 |
89.35 |
0054 |
Spiral Matrix |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Simulation, Programming_Skills_II_Day_8, Level_2_Day_1_Implementation/Simulation, Udemy_2D_Arrays/Matrix |
132 |
95.12 |
0053 |
Maximum Subarray |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Data_Structure_I_Day_1_Array, Dynamic_Programming_I_Day_5, Udemy_Famous_Algorithm, Big_O_Time_O(n)_Space_O(1) |
510 |
78.81 |
0052 |
N-Queens II |
Hard |
Backtracking |
128 |
97.56 |
0051 |
N-Queens |
Hard |
Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(N!)_Space_O(N) |
192 |
90.74 |
0050 |
Pow(x, n) |
Medium |
Top_Interview_Questions, Math, Recursion, Udemy_Integers |
172 |
38.68 |
0049 |
Group Anagrams |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Data_Structure_II_Day_8_String, Programming_Skills_II_Day_11, Udemy_Strings, Big_O_Time_O(n*k_log_k)_Space_O(n) |
308 |
96.34 |
0048 |
Rotate Image |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Data_Structure_II_Day_3_Array, Programming_Skills_II_Day_7, Udemy_2D_Arrays/Matrix, Big_O_Time_O(n^2)_Space_O(1) |
160 |
90.11 |
0047 |
Permutations II |
Medium |
Array, Backtracking, Algorithm_II_Day_10_Recursion_Backtracking |
199 |
100.00 |
0046 |
Permutations |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Algorithm_I_Day_11_Recursion_Backtracking, Level_2_Day_20_Brute_Force/Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(n*n!)_Space_O(n+n!) |
188 |
99.00 |
0045 |
Jump Game II |
Medium |
Top_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Algorithm_II_Day_13_Dynamic_Programming, Dynamic_Programming_I_Day_4, Big_O_Time_O(n)_Space_O(1) |
208 |
93.37 |
0044 |
Wildcard Matching |
Hard |
Top_Interview_Questions, String, Dynamic_Programming, Greedy, Recursion, Udemy_Dynamic_Programming |
220 |
84.85 |
0043 |
Multiply Strings |
Medium |
String, Math, Simulation, Data_Structure_II_Day_8_String, Programming_Skills_II_Day_4, Level_2_Day_2_String |
165 |
96.72 |
0042 |
Trapping Rain Water |
Hard |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Dynamic_Programming_I_Day_9, Udemy_Two_Pointers, Big_O_Time_O(n)_Space_O(1) |
189 |
99.37 |
0041 |
First Missing Positive |
Hard |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Udemy_Arrays, Big_O_Time_O(n)_Space_O(n) |
357 |
97.17 |
0040 |
Combination Sum II |
Medium |
Array, Backtracking, Algorithm_II_Day_10_Recursion_Backtracking |
217 |
93.75 |
0039 |
Combination Sum |
Medium |
Top_100_Liked_Questions, Array, Backtracking, Algorithm_II_Day_10_Recursion_Backtracking, Level_2_Day_20_Brute_Force/Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(2^n)_Space_O(n+2^n) |
226 |
88.89 |
0038 |
Count and Say |
Medium |
Top_Interview_Questions, String |
135 |
100.00 |
0037 |
Sudoku Solver |
Hard |
Array, Matrix, Backtracking |
148 |
100.00 |
0036 |
Valid Sudoku |
Medium |
Top_Interview_Questions, Array, Hash_Table, Matrix, Data_Structure_I_Day_5_Array |
181 |
95.15 |
0035 |
Search Insert Position |
Easy |
Top_100_Liked_Questions, Array, Binary_Search, Algorithm_I_Day_1_Binary_Search, Binary_Search_I_Day_2, Big_O_Time_O(log_n)_Space_O(1) |
159 |
93.03 |
0034 |
Find First and Last Position of Element in Sorted Array |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_5, Big_O_Time_O(log_n)_Space_O(1) |
174 |
100.00 |
0033 |
Search in Rotated Sorted Array |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_11, Level_2_Day_8_Binary_Search, Udemy_Binary_Search, Big_O_Time_O(log_n)_Space_O(1) |
151 |
93.77 |
0032 |
Longest Valid Parentheses |
Hard |
Top_100_Liked_Questions, String, Dynamic_Programming, Stack, Big_O_Time_O(n)_Space_O(1) |
161 |
82.14 |
0031 |
Next Permutation |
Medium |
Top_100_Liked_Questions, Array, Two_Pointers, Big_O_Time_O(n)_Space_O(1) |
205 |
48.21 |
0030 |
Substring with Concatenation of All Words |
Hard |
String, Hash_Table, Sliding_Window |
182 |
100.00 |
0029 |
Divide Two Integers |
Medium |
Top_Interview_Questions, Math, Bit_Manipulation, Udemy_Bit_Manipulation |
144 |
82.50 |
0028 |
Find the Index of the First Occurrence in a String |
Easy |
Top_Interview_Questions, String, Two_Pointers, String_Matching, Programming_Skills_II_Day_1 |
126 |
97.58 |
0027 |
Remove Element |
Easy |
Array, Two_Pointers |
162 |
76.44 |
0026 |
Remove Duplicates from Sorted Array |
Easy |
Top_Interview_Questions, Array, Two_Pointers, Udemy_Two_Pointers |
249 |
67.38 |
0025 |
Reverse Nodes in k-Group |
Hard |
Top_100_Liked_Questions, Linked_List, Recursion, Data_Structure_II_Day_13_Linked_List, Udemy_Linked_List, Big_O_Time_O(n)_Space_O(k) |
189 |
67.03 |
0024 |
Swap Nodes in Pairs |
Medium |
Top_100_Liked_Questions, Linked_List, Recursion, Data_Structure_II_Day_12_Linked_List, Udemy_Linked_List, Big_O_Time_O(n)_Space_O(1) |
149 |
44.20 |
0023 |
Merge k Sorted Lists |
Hard |
Top_100_Liked_Questions, Top_Interview_Questions, Heap_Priority_Queue, Linked_List, Divide_and_Conquer, Merge_Sort, Big_O_Time_O(k*n*log(k))_Space_O(log(k)) |
198 |
93.77 |
0022 |
Generate Parentheses |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(2^n)_Space_O(n) |
161 |
85.45 |
0021 |
Merge Two Sorted Lists |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Data_Structure_I_Day_7_Linked_List, Algorithm_I_Day_10_Recursion_Backtracking, Level_1_Day_3_Linked_List, Udemy_Linked_List, Big_O_Time_O(m+n)_Space_O(m+n) |
157 |
92.24 |
0020 |
Valid Parentheses |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, String, Stack, Data_Structure_I_Day_9_Stack_Queue, Udemy_Strings, Big_O_Time_O(n)_Space_O(n) |
137 |
88.76 |
0019 |
Remove Nth Node From End of List |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Linked_List, Algorithm_I_Day_5_Two_Pointers, Level_2_Day_3_Linked_List, Big_O_Time_O(L)_Space_O(L) |
144 |
96.28 |
0018 |
4Sum |
Medium |
Array, Sorting, Two_Pointers |
229 |
98.59 |
0017 |
Letter Combinations of a Phone Number |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(4^n)_Space_O(n) |
155 |
95.24 |
0016 |
3Sum Closest |
Medium |
Array, Sorting, Two_Pointers, Level_2_Day_14_Sliding_Window/Two_Pointer |
163 |
100.00 |
0015 |
3Sum |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Data_Structure_II_Day_1_Array, Algorithm_II_Day_3_Two_Pointers, Udemy_Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2) |
493 |
93.45 |
0014 |
Longest Common Prefix |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, String, Level_2_Day_2_String, Udemy_Strings |
154 |
89.70 |
0013 |
Roman to Integer |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Math |
211 |
83.47 |
0012 |
Integer to Roman |
Medium |
String, Hash_Table, Math |
180 |
98.25 |
0011 |
Container With Most Water |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Greedy, Two_Pointers, Algorithm_II_Day_4_Two_Pointers, Big_O_Time_O(n)_Space_O(1) |
402 |
78.57 |
0010 |
Regular Expression Matching |
Hard |
Top_Interview_Questions, String, Dynamic_Programming, Recursion, Udemy_Dynamic_Programming, Big_O_Time_O(m*n)_Space_O(m*n) |
171 |
85.26 |
0009 |
Palindrome Number |
Easy |
Math, Udemy_Integers |
217 |
95.34 |
0008 |
String to Integer (atoi) |
Medium |
Top_Interview_Questions, String |
172 |
82.90 |
0007 |
Reverse Integer |
Medium |
Top_Interview_Questions, Math, Udemy_Integers |
149 |
77.89 |
0006 |
Zigzag Conversion |
Medium |
String |
200 |
97.79 |
0005 |
Longest Palindromic Substring |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Data_Structure_II_Day_9_String, Algorithm_II_Day_14_Dynamic_Programming, Dynamic_Programming_I_Day_17, Udemy_Strings, Big_O_Time_O(n)_Space_O(n) |
162 |
99.00 |
0004 |
Median of Two Sorted Arrays |
Hard |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Divide_and_Conquer, Big_O_Time_O(log(min(N,M)))_Space_O(1), AI_can_be_used_to_solve_the_task |
293 |
75.96 |
0003 |
Longest Substring Without Repeating Characters |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Algorithm_I_Day_6_Sliding_Window, Level_2_Day_14_Sliding_Window/Two_Pointer, Udemy_Strings, Big_O_Time_O(n)_Space_O(1), AI_can_be_used_to_solve_the_task |
201 |
87.28 |
0002 |
Add Two Numbers |
Medium |
Top_100_Liked_Questions, Top_Interview_Questions, Math, Linked_List, Recursion, Data_Structure_II_Day_10_Linked_List, Programming_Skills_II_Day_15, Big_O_Time_O(max(N,M))_Space_O(max(N,M)), AI_can_be_used_to_solve_the_task |
203 |
96.13 |
0001 |
Two Sum |
Easy |
Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Data_Structure_I_Day_2_Array, Level_1_Day_13_Hashmap, Udemy_Arrays, Big_O_Time_O(n)_Space_O(n), AI_can_be_used_to_solve_the_task |
202 |
91.18 |