http://codeforces.com/contest/676 在allzysyz学弟和hqwhqwhq的邀请下,打了我的第三场CF... 毕竟在半夜..所以本来想水到12点就去睡觉的...结果一下次过了三题,发现第四题是个bfs,就打到了12:30....BC貌似是没有了,不知道后面还会不会有,最近就打CF为主吧.. A题: http://codeforces.com/problemset/problem/676/A 应该算是比较水吧.没有什么坑点.直接枚举最大值在最左最右侧和最小值在最左…
Codeforces Round #354 (Div. 2) Problems     # Name     A Nicholas and Permutation standard input/output 1 s, 256 MB    x3384 B Pyramid of Glasses standard input/output 1 s, 256 MB    x1462 C Vasya and String standard input/output 1 s, 256 MB    x1393…
D. Theseus and labyrinth 题目链接:http://codeforces.com/contest/676/problem/D Theseus has just arrived to Crete to fight Minotaur. He found a labyrinth that has a form of a rectangular field of sizen × m and consists of blocks of size 1 × 1. Each block o…
C. Vasya and String 题目链接:http://codeforces.com/contest/676/problem/C High school student Vasya got a string of length n as a birthday present. This string consists of letters 'a' and 'b' only. Vasya denotes beauty of the string as the maximum length…
B. Pyramid of Glasses 题目链接:http://codeforces.com/contest/676/problem/B Mary has just graduated from one well-known University and is now attending celebration party. Students like to dream of a beautiful life, so they used champagne glasses to constr…
A. Nicholas and Permutation 题目链接:http://codeforces.com/contest/676/problem/A Nicholas has an array a that contains n distinct integers from 1 to n. In other words, Nicholas has a permutation of size n. Nicholas want the minimum element (integer 1) an…
题目链接: http://codeforces.com/contest/676/problem/D 题意: 如果两个相邻的格子都有对应朝向的门,则可以从一个格子到另一个格子,给你初始坐标xt,yt,终点坐标xm,ym,现在你可以选择在原地把地图上所有格子顺时针旋转90度:或者往上下左右走一格,问走到终点的最短路. 题解: 三维的bfs最短路,就是写起来比较麻烦. #include<iostream> #include<cstring> #include<cstdio>…
题目链接: http://codeforces.com/contest/676/problem/C 题解: 把连续的一段压缩成一个数,对新的数组求前缀和,用两个指针从左到右线性扫一遍. 一段值改变一部分的情况考虑的不够周到,wa了两次. #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> #include<cmath> #include<vect…
题目连接:http://codeforces.com/contest/676/problem/C 题意:一串字符串,最多改变k次,求最大的相同子串 题解:很明显直接尺取法 #include<cstdio> #include<cstring> #include<cmath> #include<string> #include<set> #include<map> #include<vector> #include<qu…
E. The Last Fight Between Human and AI 题目连接: http://codeforces.com/contest/676/problem/E Description 100 years have passed since the last victory of the man versus computer in Go. Technologies made a huge step forward and robots conquered the Earth!…