Problem H. ICPC QuestTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100500/attachments Description Noura Boubou is a Syrian volunteer at ACM ACPC (Arab Collegiate Programming Contest) since 2011. She graduated from Tishreen Un…

A. Potion of Immortality Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100187/problem/A Description The world famous scientist Innokentiy has just synthesized the potion of immortality. Unfortunately, he put the flask with th…

题目链接: http://codeforces.com/gym/101161/attachments 题意: 总共有n瓶药可供选择 每瓶药可以增加$e_i$点体力,和$p_i$点毒性 每分钟消耗1点毒性,毒性不能大于99,体力不能小于0大于100 击败一只怪物消耗$k$点体力,花费$m$分钟 计算不最大击败怪物的数量 数据范围: $1\leq n\leq 8$ 分析: 定义$dp[i][j][k]$为药物状态为$i$,体力为$j$,毒性为$k$的最大击败数 初始化$dp[0][100][0]=0…

题目链接:http://codeforces.com/problemset/problem/455/A 给你n个数,要是其中取一个大小为x的数,那x+1和x-1都不能取了,问你最后取完最大的和是多少. 简单dp,dp[i]表示取i时zui最大和为多少,方程为dp[i] = max(dp[i - 1] , dp[i - 2] + cont[i]*i). #include <bits/stdc++.h> using namespace std; typedef __int64 LL; ; LL a…

Problem H. ICPC QuestTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100500/attachments Description Coach Fegla has invented a song effectiveness measurement methodology. This methodology in simple English means count the frequ…

题目链接:http://codeforces.com/gym/100187/problem/A 题解: 光题意就想了很久:在最坏情况下的最小兔子数.其实就是至少用几只兔子就一定能找出仙药(答案存在的话).再注意一下特殊情况就可以了, 代码如下: #include <iostream> #include <cstdio> #include <cstring> #include <cstdlib> #include <string> #include…

Fighting for Triangles 题目连接: http://codeforces.com/gym/100015/attachments Description Andy and Ralph are playing a two-player game on a triangular board that looks like the following: 1 2 3 4 5 7 8 6 9 10 11 13 14 16 17 12 15 18 At each turn, a playe…

D. Selection Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100114 Description When selecting files in an application dialog, Vasya noted that he can get the same selection in different ways. A simple mouse click selects a sing…

题意:一个数组a[i],你可以挑出若干个数(只能挑一次)加起来等于k, 针对每一种方案,你可以选出这若干个数的子集来组合新数 最后所有的方案能组合出多少种数 分析:一看数据范围n,k<=500 那就是显而易见就是母函数那套了 从1到n,dp[i][j],代表通过前i个元素和为i,能否组合出j #include <cstdio> #include <iostream> #include <ctime> #include <vector> #include…

Problem F. Fibonacci SystemTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=86821#problem/B Description Little John studies numeral systems. After learning all about fixed-base systems, he became inte…