class Solution:
    '''
    Time Complexity: O(1)
    Space Complexity: O(1)
    Python generates only 32 bits for integers, so the length is fixed
    Solved in 2 mins, all by yourself! Good job!
    '''
    def hasAlternatingBits(self, n: int) -> bool:
        s = bin(n)[2:]
        for i in range(1, len(s)):
            if s[i-1] == s[i]:
                return False
        return True