剑指 Offer 15. 二进制中1的个数

Posted on 2021-06-23 Edited on 2022-11-27 In 剑指 Offer Disqus:
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剑指 Offer 15. 二进制中1的个数

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

骚方法（太优秀了

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