My python solution

  • 1
    class Solution:
        # @param {integer} n
        # @return {boolean}
        def isPowerOfTwo(self, n):
            if n <= 0:
                return False
            x = bin(n)[2:]
            sum = 0
            for i in x:
                sum += int(i)
            if sum>1:
                return False
                return True

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