[LeetCode] 476. Number Complement_Easy tag: Bit Manipulation

这个题目思路就是比如101 的结果是010, 可以从111^101 来得到, 那么我们就需要知道刚好比101多一位的1000, 所以利用 while i <= num : i <<= 1, 去得到1000, 然后-1, 便得到111,

再跟num ^, 也就是异或即可.

Code

class Solution(object):
    def findComplement(self, num):
        i = 1
        while i <= num:
            i <<= 1
        return (i-1)^num

原文地址:https://www.cnblogs.com/Johnsonxiong/p/9496579.html

时间: 2024-10-08 19:11:25

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