Flip Bits

Question

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

Thoughts

很简单，但是要注意在有负数的情况下不能用while x, 可以假设为32位整数

Solution

class Solution:
    """
    @param a, b: Two integer
    return: An integer
    """
    def bitSwapRequired(self, a, b):
        # write your code here
        x = a ^ b
        num = 0
        number = 32
        while number > 0:
            if x & 1 > 0:
                num += 1
            x = x >> 1
            number -= 1

        return num