原文链接http://www.cnblogs.com/zhouzhendong/p/8284304.html 题目传送门 - HDU3488 题意概括 给一个n的点m条边的有向图. 然后让你把这个图分成许多环,问环中边权和最小为多少. 题目保证一定存在合法的方案. 题解 我们把每一个点扯成两个点. 一个专门接受入度,一个专门接受出度,然后就是KM裸题了. 数组模拟链表可能会比邻接矩阵快一些. 代码 #include <cstring> #include <algorithm> #i…

题目链接:https://vjudge.net/problem/HDU-3488 Tour Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 3720    Accepted Submission(s): 1777 Problem Description In the kingdom of Henryy, there are N (2 <=…

Tour Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others) Total Submission(s): 2462    Accepted Submission(s): 1222 Problem Description In the kingdom of Henryy, there are N (2 <= N <= 200) cities, with M (M <= 3000…

In the kingdom of Henryy, there are N (2 <= N <= 200) cities, with M (M <= 30000) one-way roads connecting them. You are lucky enough to have a chance to have a tour in the kingdom. The route should be designed as: The route should contain one or…

Tour Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others) Total Submission(s): 3378    Accepted Submission(s): 1627 Problem Description In the kingdom of Henryy, there are N (2 <= N <= 200) cities, with M (M <= 3000…

题目链接: Hdu 3488 Tour 题目描述: 有n个节点,m条有权单向路,要求用一个或者多个环覆盖所有的节点.每个节点只能出现在一个环中,每个环中至少有两个节点.问最小边权花费为多少? 解题思路: 因为每个节点就出现一个,那么每个节点出度和入度都为1咯.我们可以对每个节点u拆点为u,u',分别放在集合X,Y.然后对两个集合进行完备匹配.完备匹配成功以后,每个节点就会有只有一个出度,一个入度的. 用KM求最小匹配的话,先初始化maps为-INF,然后把各边权值存为负,求出最大值取反即可. #…

Tour Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 3159    Accepted Submission(s): 1525 Problem Description In the kingdom of Henryy, there are N (2 <= N <= 200) cities, with M (M <= 30000…

    A-L 二分匹配 M-O 二分图多重匹配 P-Q 二分图最大权匹配 R-S 一般图匹配带花树 模板请自己找     ID Origin Title   61 / 72 Problem A HDU 1045 Fire Net   52 / 112 Problem B HDU 2444 The Accomodation of Students   45 / 86 Problem C HDU 1083 Courses   44 / 63 Problem D HDU 1281 棋盘游戏   35…

Tour Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 4279    Accepted Submission(s): 2041 题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3488 Description: In the kingdom of Henryy, there are N (…

Tour Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 2628    Accepted Submission(s): 1285 Problem Description In the kingdom of Henryy, there are N (2 <= N <= 200) cities, with M (M <= 30000…