LeetCode in Kotlin

1016. Binary String With Substrings Representing 1 To N

Medium

Given a binary string s and a positive integer n, return true if the binary representation of all the integers in the range [1, n] are substrings of s, or false otherwise.

A substring is a contiguous sequence of characters within a string.

Example 1:

Input: s = “0110”, n = 3

Output: true

Example 2:

Input: s = “0110”, n = 4

Output: false

Constraints:

• 1 <= s.length <= 1000
• s[i] is either '0' or '1'.
• 1 <= n <= 109

Solution

class Solution {
    fun queryString(s: String, n: Int): Boolean {
        for (i in 1..n) {
            val str = Integer.toBinaryString(i)
            if (!s.contains(str)) {
                return false
            }
        }
        return true
    }
}

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