LeetCode in Kotlin

3921. Score Validator

Easy

You are given a string array events.

Initially, score = 0 and counter = 0. Each element in events is one of the following:

• "0", "1", "2", "3", "4", "6": Add that value to the total score.
• "W": Increase the counter by 1. No score is added.
• "WD": Add 1 to the total score.
• "NB": Add 1 to the total score.

Process the array from left to right. Stop processing when either:

• All elements in events have been processed, or
• The counter becomes 10.

Return an integer array [score, counter], where:

• score is the final total score.
• counter is the final counter value.

Example 1:

Input: events = [“1”,”4”,”W”,”6”,”WD”]

Output: [12,1]

Explanation:

Event	Score	Counter
"1"	1	0
"4"	5	0
"W"	5	1
"6"	11	1
"WD"	12	1

Final result: [12, 1].

Example 2:

Input: events = [“WD”,”NB”,”0”,”4”,”4”]

Output: [10,0]

Explanation:

Event	Score	Counter
"WD"	1	0
"NB"	2	0
"0"	2	0
"4"	6	0
"4"	10	0

Final result: [10, 0].

Example 3:

Input: events = [“W”,”W”,”W”,”W”,”W”,”W”,”W”,”W”,”W”,”W”,”W”]

Output: [0,10]

Explanation:

After 10 occurrences of "W", the counter reaches 10, so processing stops. The remaining events are ignored.

Constraints:

• 1 <= events.length <= 1000
• events[i] is one of "0", "1", "2", "3", "4", "6", "W", "WD", or "NB".

Solution

class Solution {
    fun scoreValidator(events: Array<String>): IntArray? {
        var counter = 0
        var score = 0
        for (i in events) {
            if (counter == 10) {
                break
            }
            if (i == "WD") {
                score += 1
            } else if (i == "NB") {
                score += 1
            } else if (i == "W") {
                counter += 1
            } else {
                score += i.toInt()
            }
        }
        return intArrayOf(score, counter)
    }
}

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