题目链接:http://codeforces.com/contest/721/problem/A A. One-dimensional Japanese Crossword time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Recently Adaltik discovered japanese crosswords. Japan…
Brain's Photos 题目链接: http://codeforces.com/contest/707/problem/A Description Small, but very brave, mouse Brain was not accepted to summer school of young villains. He was upset and decided to postpone his plans of taking over the world, but to becom…
A. One-dimensional Japanese Crossword 题目连接: http://codeforces.com/contest/721/problem/A Description Recently Adaltik discovered japanese crosswords. Japanese crossword is a picture, represented as a table sized a × b squares, and each square is color…
http://codeforces.com/contest/721/problem/C 题目大意:给你有向路,每条路都有一个权值t,你从1走到n,最多花费不能超过T,问在T时间内最多能访问多少城市? 思路:dp确实好玩,然而我不会TAT 首先我们定义dp[i][j]表示从i走到n,途中经过j个城市所需要的花费.接下来就枚举拓扑序就好了 //看看会不会爆int!数组会不会少了一维! //取物问题一定要小心先手胜利的条件 #include <bits/stdc++.h> using namespa…
D. Maxim and Array 题目连接: http://codeforces.com/contest/721/problem/D Description Recently Maxim has found an array of n integers, needed by no one. He immediately come up with idea of changing it: he invented positive integer x and decided to add or…
C. Journey 题目连接: http://codeforces.com/contest/721/problem/C Description Recently Irina arrived to one of the most famous cities of Berland - the Berlatov city. There are n showplaces in the city, numbered from 1 to n, and some of them are connected…
B. Passwords 题目连接: http://codeforces.com/contest/721/problem/B Description Vanya is managed to enter his favourite site Codehorses. Vanya uses n distinct passwords for sites at all, however he can't remember which one exactly he specified during Code…
题目链接:http://codeforces.com/problemset/problem/721/D D. Maxim and Array time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Recently Maxim has found an array of n integers, needed by no one. He…
题目链接:http://codeforces.com/contest/721/problem/C C. Journey time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Recently Irina arrived to one of the most famous cities of Berland — the Berlato…
题目链接:http://codeforces.com/contest/721/problem/B B. Passwords time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vanya is managed to enter his favourite site Codehorses. Vanya uses n distinct…
A题和B题是一如既往的签到题. C题是一道拓扑序dp题,题意是给定一个DAG,问你从1号点走到n号点,在长度不超过T的情况下,要求经过的点数最多,换个思维,设dp[i][j]表示到i号点时经过j个点的最小距离,我们按拓扑序转移即可,最后找到一个最大的x,使得dp[n][x]<=T即可,由于还要输出路径,我们就需要记录一下转移. #include <iostream> #include <cstdio> #include <cstring> #include <…
传送门 分析:其实没什么好分析的.统计一下负数个数.如果负数个数是偶数的话,就要尽量增加负数或者减少负数.是奇数的话就努力增大每个数的绝对值.用一个优先队列搞一下就行了. 我感觉这道题的细节极为多,非常复杂,其实是自己智障了.. 我看了一下学长菊苣的代码,好精巧...注释部分是他的代码 /*****************************************************/ //#pragma comment(linker, "/STACK:1024000000,10240…
C.Journey 读错题目了...不是无向图,结果建错图了(喵第4样例是变成无向就会有环的那种图) 并且这题因为要求路径点尽可能多 其实可以规约为限定路径长的拓扑排序,不一定要用最短路做 #pragma comment(linker, "/STACK:1024000000,1024000000") #include<cstdio> #include<cstring> #include<cmath> #include<algorithm>…
A. One-dimensional Japanese Crossword time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Recently Adaltik discovered japanese crosswords. Japanese crossword is a picture, represented as a tabl…
C. Journey time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Recently Irina arrived to one of the most famous cities of Berland — the Berlatov city. There are n showplaces in the city, numbe…
A. One-dimensional Japanese Crossword time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Recently Adaltik discovered japanese crosswords. Japanese crossword is a picture, represented as a tabl…
D. Maxim and Array time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Recently Maxim has found an array of n integers, needed by no one. He immediately come up with idea of changing it: he in…
= =C题这种DP打的少吧,记得以前最短路分层图打过这样子的,然后比赛前半个小时才恍然大雾...然后瞎几把还打错了,还好A,B手速快..上分了: A题: 计算B的连续个数的组数,每组的连续个数: 水题: #include <iostream> #include<cstdio> #include<string.h> #include<algorithm> using namespace std; char s[110]; int a[110]; int mai…
C. Journey time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Recently Irina arrived to one of the most famous cities of Berland — the Berlatov city. There are n showplaces in the city, numbe…
C. Journey time limit per test3 seconds memory limit per test256 megabytes inputstandard input outputstandard output Recently Irina arrived to one of the most famous cities of Berland — the Berlatov city. There are n showplaces to n, and some of them…
C. Efim and Strange Grade 题目连接: http://codeforces.com/contest/719/problem/C Description Efim just received his grade for the last test. He studies in a special school and his grade can be equal to any positive decimal fraction. First he got disappoin…
B. Case of Fake Numbers Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/556/problem/B Description Andrewid the Android is a galaxy-famous detective. He is now investigating a case of frauds who make fake copies of the famou…
B. Ohana Cleans Up Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/554/problem/B Description Ohana Matsumae is trying to clean a room, which is divided up into an n by n grid of squares. Each square is initially either clea…
A. Kyoya and Photobooks Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/554/problem/A Description Kyoya Ootori is selling photobooks of the Ouran High School Host Club. He has 26 photos, labeled "a" to "z", a…
A. Whose sentence is it? Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/312/problem/A Description One day, liouzhou_101 got a chat record of Freda and Rainbow. Out of curiosity, he wanted to know which sentences were said…
A. Wilbur and Swimming Pool Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/596/problem/A Description After making bad dives into swimming pools, Wilbur wants to build a swimming pool in the shape of a rectangle in his back…
A. The Child and Toy Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/438/problem/A Description On Children's Day, the child got a toy from Delayyy as a present. However, the child is so naughty that he can't wait to destroy…
C. Duff and Weight Lifting Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/588/problem/C Description Recently, Duff has been practicing weight lifting. As a hard practice, Malek gave her a task. He gave her a sequence of wei…
B. Gerald is into Art Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/560/problem/B Description Gerald bought two very rare paintings at the Sotheby's auction and he now wants to hang them on the wall. For that he bought a…
A. Currency System in Geraldion Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/560/problem/A Description A magic island Geraldion, where Gerald lives, has its own currency system. It uses banknotes of several values. But t…