传送门 E. Anya and Cubes time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Anya loves to fold and stick. Today she decided to do just that. Anya has n cubes lying in a line and numbered from 1…

C. Captains Mode 题目连接: http://codeforces.com/contest/377/problem/C Description Kostya is a progamer specializing in the discipline of Dota 2. Valve Corporation, the developer of this game, has recently released a new patch which turned the balance of…

原题链接:http://codeforces.com/contest/580/problem/D 题意: 给你一些一个有向图,求不超过m步的情况下,能获得的最大权值和是多少,点不能重复走. 题解: 令$dp[u][s]$为在节点u的时候状态是s的最大值.利用spfa的松弛操作来转移. 代码: #include<iostream> #include<cstring> #include<vector> #include<algorithm> #include&l…

C - Remembering Strings 思路:最关键的一点是字符的个数比串的个数多. 然后就能状压啦. #include<bits/stdc++.h> #define LL long long #define fi first #define se second #define mk make_pair #define PII pair<int, int> #define y1 skldjfskldjg #define y2 skldfjsklejg using names…

题目:https://codeforc.es/contest/1215/problem/E 题意:给你一个序列,你可以交换相邻的两个数,要达到一个要求,所有相同的数都相邻,问你交换次数最少是多少 思路:我们可以看到数的个数是1e5,数的范围只有20,很明显这个范围要干些什么,我们可以尝试去想一下状压,我们把数都弄到一起,然后一起状压,因为最后要变成是   xxxxyyyyyzzzkkka  的形态,所以我们可以把问题转化成 "一次放一个数", 这个思想很关键,经常在dp里面用到,这样的…

题意 林老师是一位大理石收藏家,他在家里收藏了n块各种颜色的大理石,第i块大理石的颜色为ai.但是林老师觉得这些石头在家里随意摆放太过凌乱,他希望把所有颜色相同的石头放在一起.换句话说,林老师需要对现有的大理石重新进行排列,在重新排列之后,对于每一个颜色j,如果最左边的颜色为j的大理石是第l块大理石,最右边的颜色为j的大理石是第r块大理石,那么从第l块大理石到第r块大理石,这些石头的颜色都为j. 由于这些大理石都比较重,林老师无法承受这些大理石的重量太久,所以他每次搬运只能交换相邻的两块大理石.…

Codeforces Round #297 (Div. 2)E. Anya and Cubes Time Limit: 2 Sec  Memory Limit: 512 MBSubmit: xxx  Solved: 2xx 题目连接 http://codeforces.com/contest/525/problem/E Description Anya loves to fold and stick. Today she decided to do just that. Anya has n c…

Codeforces Round #297 (Div. 2)D. Arthur and Walls Time Limit: 2 Sec  Memory Limit: 512 MBSubmit: xxx  Solved: 2xx 题目连接 http://codeforces.com/contest/525/problem/D Description Finally it is a day when Arthur has enough money for buying an apartment. H…

Codeforces Round #297 (Div. 2)C. Ilya and Sticks Time Limit: 2 Sec  Memory Limit: 256 MBSubmit: xxx  Solved: 2xx 题目连接 http://codeforces.com/contest/525/problem/C Description In the evening, after the contest Ilya was bored, and he really felt like ma…

Codeforces Round #297 (Div. 2)B. Pasha and String Time Limit: 2 Sec  Memory Limit: 256 MBSubmit: xxx  Solved: 2xx 题目连接 http://codeforces.com/contest/525/problem/B Description Pasha got a very beautiful string s for his birthday, the string consists o…