http://codeforces.com/contest/510/status/B 题目大意 给一个n*m  找有没有相同字母连起来的矩形串 第一种并查集 瞎搞一下 第一次的时候把val开成字符串了 所以wa 改了AC #include<cstdio> #include<map> //#include<bits/stdc++.h> #include<vector> #include<stack> #include<iostream>…

题目传送门 /* 水题 找规律输出 */ #include <cstdio> #include <iostream> #include <cstring> #include <string> #include <map> #include <algorithm> #include <vector> #include <set> #include <cmath> using namespace std…

E. Fox And Dinner time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Fox Ciel is participating in a party in Prime Kingdom. There are n foxes there (include Fox Ciel). The i-th fox is ai year…

D. Fox And Jumping 题目连接: http://codeforces.com/contest/510/problem/D Description Fox Ciel is playing a game. In this game there is an infinite long tape with cells indexed by integers (positive, negative and zero). At the beginning she is standing at…

C. Fox And Names 题目连接: http://codeforces.com/contest/510/problem/C Description Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in…

B. Fox And Two Dots 题目连接: http://codeforces.com/contest/510/problem/B Description Fox Ciel is playing a mobile puzzle game called "Two Dots". The basic levels are played on a board of size n × m cells, like this: Each cell contains a dot that ha…

A. Fox And Snake 题目连接: http://codeforces.com/contest/510/problem/A Description Fox Ciel starts to learn programming. The first task is drawing a fox! However, that turns out to be too hard for a beginner, so she decides to draw a snake instead. A sna…

一看就是找规律的题.只要熟悉异或的性质,可以秒杀. 为了防止忘记异或的规则,可以把异或理解为半加运算:其运算法则相当于不带进位的二进制加法. 一些性质如下: 交换律: 结合律: 恒等律: 归零律: 典型应用:交换a和b的值:a=a^b^(b=a); #include<iostream> #include<cstdio> #include<cstdlib> #include<cstring> #include<cmath> #include<…

题目链接:http://codeforces.com/contest/664/problem/B B. Rebus time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given a rebus of form ? + ? - ? + ? = n, consisting of only question marks,…

http://codeforces.com/problemset/problem/510/B #include "cstdio" #include "cstring" int r,c; ][]; ][]; int mark; ]={,-,,},dy[]={,,,-}; int judge(int x,int y) { ||x>=r||y<||y>=c) ; ; } void dfs(int x,int y,int perX,int perY) {…