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461.Hamming Distance
question
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 < 2^31.
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.
solution:
class Solution(object):
def hammingDistance(self, x, y):
"""
:type x: int
:type y: int
:rtype: int
"""
return bin(x ^ y).count("1")
bin() 返回一个整数 int 或者长整数 long int 的二进制表示,类型为字符串。如bin(6)返回“0b101”,count()函数返回字符串中某个字符出现的个数.