The Hamming distance between two integers is the number of positions at which the corresponding bits are different.
Given two integers x and y, 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:
     def hammingDistance(self, x, y):
         """
         :type x: int
         :type y: int
         :rtype: int
         """
         x = x ^ y
         y = 0
         while (x):
             y += 1
             x &= x-1
         return y

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