Leetcode 191 Number of 1 Bits
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Leetcode 191 Number of 1 Bits
#include <stdint.h>using namespace std;class Solution {public: int hammingWeight(uint32_t n) { //n减1是将n最右边的那个1变成0,如果这个1后面跟着0,则这些0全变成1,相与可以得到最右边的1 //1111-1 = 1110,1000 - 1 = 0111,n&(n-1),每次会消掉最右边的那个0, int count = 0; while (n){ n = n &(n - 1); count++; } return count; }};
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