[LeetCode]191. Number of 1 Bits

[LeetCode]191. Number of 1 Bits

题目描述

思路

位操作，之前做过类似的

代码

class Solution {
public:
    int hammingWeight(uint32_t n) {
        int res = 0;
        while (n){
            res++;
            n &= n - 1;
        }
        return res;
    }
};