Given a binary string s ​​​​​without leading zeros, return true​​​ if s contains at most one contiguous segment of ones. Otherwise, return false. Example 1: Input: s = "1001" Output: false Explanation: The ones do not form a contiguous segment. Example 2: Input: s = "110" Output: true Constraints: 1 <= s.length <= 100 s[i]​​​​ is either '0' or '1'. s[0] is '1'.