2025-08-15 15:04:18 +0300 MSK

Check if Binary String Has at Most One Segment of Ones
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Code

class Solution:
    def checkOnesSegment(self, s: str) -> bool:
        enc = False
        for char in s:
            if char == "1":
                if enc:
                    return False
            elif not enc:
                enc = True
        return True