Filp Bits

Source

• lintcode: Flip Bits

Determine the number of bits required to flip if you want to convert integer n to integer m.

Example
Given n = 31 (11111), m = 14 (01110), return 2.

Note
Both n and m are 32-bit integers.

Python

class Solution:
    """
    @param a, b: Two integer
    return: An integer
    """
    def bitSwapRequired(self, a, b):
        # write your code here
        count=0

        xor = a^b
        for i in range(32):
            count += (xor&1)
            xor>>=1
        return count