L_H_L的博客

/** * Definition for binary tree * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */ class Soluti...

class Solution { public: int NumberOf1(int n) { int count=0; while(n) { count++; n=n&(n-1); } return count; } }; ...