An N x N board contains only 0s and 1s. In each move, you can swap any 2 rows with each other, or any 2 columns with each other. What is the minimum number of moves to transform the board into a "chessboard" - a board where no 0s and no 1s are 4…

An N x N board contains only 0s and 1s. In each move, you can swap any 2 rows with each other, or any 2 columns with each other. What is the minimum number of moves to transform the board into a "chessboard" - a board where no 0s and no 1s are 4…

An N x N board contains only 0s and 1s. In each move, you can swap any 2 rows with each other, or any 2 columns with each other. What is the minimum number of moves to transform the board into a "chessboard" - a board where no 0s and no 1s are 4…

Implement function ToLowerCase() that has a string parameter str, and returns the same string in lowercase. Example 1: Input: "Hello" Output: "hello" Example 2: Input: "here" Output: "here" Example 3: Input: "L…

暴力,和八皇后很像,用表示i+j和i-j标记主对角线,但是还是要加一些的剪枝的. 1.最裸的暴搜 6.420s,差点超时 2.之前位置放过的就没必要在放了,每次从上一次放的位置开始放 0.400s #include<cstdio> #include<cstring> ; char G[maxn][maxn]; int maxd; int n,m; ],vis2[maxn<<]; bool dfs(int d,int si,int sj) { if(d == maxd){…

请点击页面左上角 -> Fork me on Github 或直接访问本项目Github地址:LeetCode Solution by Swift    说明:题目中含有$符号则为付费题目. 如:[Swift]LeetCode156.二叉树的上下颠倒 $ Binary Tree Upside Down 请下拉滚动条查看最新 Weekly Contest!!! Swift LeetCode 目录 | Catalog 序        号 题名Title 难度     Difficulty  两数之…

There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it costs cost[i] of gas to travel from station i to its next station (i+1). You begin the journey with an e…

突然很想刷刷题,LeetCode是一个不错的选择,忽略了输入输出,更好的突出了算法,省去了不少时间. dalao们发现了任何错误,或是代码无法通过,或是有更好的解法,或是有任何疑问和建议的话,可以在对应的随笔下面评论区留言,我会及时处理,在此谢过了. 过程或许会很漫长,也很痛苦,慢慢来吧. 编号 题名 过题率 难度 1 Two Sum 0.376 Easy 2 Add Two Numbers 0.285 Medium 3 Longest Substring Without Repeating C…

645. Set Mismatch The set S originally contains numbers from 1 to n. But unfortunately, due to the data error, one of the numbers in the set got duplicated to another number in the set, which results in repetition of one number and loss of another nu…

All LeetCode Questions List(Part of Answers, still updating) 题目汇总及部分答案(持续更新中) Leetcode problems classified by company 题目按公司分类(Last updated: October 2, 2017) .   Top Interview Questions # Title Difficulty Acceptance 1 Two Sum Medium 17.70% 2 Add Two N…