Time Limit: 1000MS Memory Limit: 10000K Description Mirko works on a pig farm that consists of M locked pig-houses and Mirko can't unlock any pighouse because he doesn't have the keys. Customers come to the farm one after another. Each of them has ke…

PIGS Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 20662   Accepted: 9435 Description Mirko works on a pig farm that consists of M locked pig-houses and Mirko can't unlock any pighouse because he doesn't have the keys. Customers come t…

一开始不看题解,建图出错了.后来发现是题目理解错了.  if Mirko wants, he can redistribute the remaining pigs across the unlocked pig-houses. 题目中的这句话非常关键,没理解就错掉了.有很多人写的题解只告诉我们怎么做,却没告诉我们为什么要那样做. 这句话是的意思是可以重组打开过的猪圈.也就是当客人打开猪圈(他能打开的都打开了)以后,他选择了需要买的猪以后,Mirko可以随意把剩下的猪分配到打开的猪圈中.当然,我…

题意:       有一个人,他有m个猪圈,每个猪圈里面有一定数量的猪,但是每个猪圈的门都是锁着的,他自己没有钥匙,只有顾客有钥匙,一天依次来了n个顾客,(记住是依次来的)他们每个人都有一些钥匙,和他们想买猪的数量,他们可以用自己的钥匙打开猪圈,最后卖给他多少是你自己决定的,当顾客打开它能打开的这几个猪圈的时候你可以调整打开的这几个猪圈里面的猪的数量,等他走了,猪圈又被锁上了,就这样,最后问你最多能卖给这n个人多少头猪. 思路:       最大流,建图挺简单的(很早以前我做过这个题目,当时写的…

一次舞会有n个男孩和n个女孩.每首曲子开始时,所有男孩和女孩恰好配成n对跳交谊舞.每个男孩都不会和同一个女孩跳两首(或更多)舞曲.有一些男孩女孩相互喜欢,而其他相互不喜欢(不会“单向喜欢”).每个男孩最多只愿意和k个不喜欢的女孩跳舞,而每个女孩也最多只愿意和k个不喜欢的男孩跳舞.给出每对男孩女孩是否相互喜欢的信息,舞会最多能有几首舞曲?Input 第一行包含两个整数n和k.以下n行每行包含n个字符,其中第i行第j个字符为'Y'当且仅当男孩i和女孩j相互喜欢.Output 仅一个数,即舞曲数目的最…

题目链接:http://poj.org/problem?id=1149 PIGS Time Limit: 1000MS   Memory Limit: 10000K Total Submissions:24094   Accepted: 10982 Description Mirko works on a pig farm that consists of M locked pig-houses and Mirko can't unlock any pighouse because he doe…

3638: Cf172 k-Maximum Subsequence Sum Time Limit: 50 Sec  Memory Limit: 256 MBSubmit: 174  Solved: 92[Submit][Status][Discuss] Description 给一列数,要求支持操作: 1.修改某个数的值 2.读入l,r,k,询问在[l,r]内选不相交的不超过k个子段,最大的和是多少. Input The first line contains integer n (1 ≤ n …

想了好久啊...(#-.-) 开始想到m*n个点的构图,明显超时,于是考虑压缩节点个数 我们发现每个猪圈最后被有且只有一个人调整,于是想到对于一个人,连接他能调整的每个猪圈的上一个控制人.(不懂可以开代码  (・(ｪ)・)   ) /** * Problem:POJ1149 * Author:Shun Yao * Time:2013.9.13 * Result: * Memo: */ #include <cstring> #include <cstdio> #define INF…

PIGS Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 18742   Accepted: 8511 Description Mirko works on a pig farm that consists of M locked pig-houses and Mirko can't unlock any pighouse because he doesn't have the keys. Customers come t…

PIGS Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 16555   Accepted: 7416 Description Mirko works on a pig farm that consists of M locked pig-houses and Mirko can't unlock any pighouse because he doesn't have the keys. Customers come t…