Concise and readable Python Solution


  • 0
    class Solution(object):
        def hasAlternatingBits(self, n):
            """
            :type n: int
            :rtype: bool
            """
            check = n ^ (n >> 1)  # check the adjecent two bits
            # if there is no alternative bits, all bits of check will be 1
            return not check & (check + 1)
    

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