Hamming Distance

TheHamming distancebetween two integers is the number of positions at which the corresponding bits are different.

Given two integersxandy, calculate the Hamming distance.

Note: 0 ≤x,y< 231.

Example:

Input:
 x = 1, y = 4


Output:
 2


Explanation:

1   (0 0 0 1)
4   (0 1 0 0)
       ↑   ↑

The above arrows point to positions where the corresponding bits are different.

class Solution(object):
    def hammingDistance(self, x, y):
        """
        :type x: int
        :type y: int
        :rtype: int
        """
        z = x^y
        count = 0
        while z:
            z = z & (z - 1)
            count += 1