摘要：
class Solution {public: vector > subsetsWithDup(vector &S) { int len = S.size(); vector > res; vector subset; if (len ... 阅读全文
摘要：
You are given annxn2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Follow up:Could you do this in-place?class Solution {pub... 阅读全文