Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1526    Accepted Submission(s): 580 Problem Description In graph theory, a pseudoforest is an undirected graph in which every connec…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3367 Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 2870    Accepted Submission(s): 1126 Problem Description In graph theory, a pseu…

Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 1705    Accepted Submission(s): 653 Problem Description In graph theory, a pseudoforest is an undirected graph in which every conne…

Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 1070    Accepted Submission(s): 417 Problem Description In graph theory, a pseudoforest is an undirected graph in which every conne…

Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 2382    Accepted Submission(s): 933 Problem Description In graph theory, a pseudoforest is an undirected graph in which every conne…

题意:有一种叫作Pseudoforest的结构,表示在无向图上,每一个块中选取至多包含一个环的边的集合,又称“伪森林”.问这个集合中的所有边权之和最大是多少? 分析:如果没有环,那么构造的就是最大生成森林,在此基础上,只要取每个块中剩余边的最大边,必然得到结果.不过要构造出每条边归属于哪个块.  看了别人的代码,发现原来可以直接构造出一个标记数组记录环,在做并查集的时候扩充if(find(u)==find(v))这一条件,可以直接得到结果. #include<cstdio> #include&…

#include <cstdio> #include <cstring> #include <vector> #include <algorithm> using namespace std; ; int n, m; struct node { int u, v, c; }g[maxn]; long long ans; int fa[maxn]; int ff[maxn]; int ee[maxn]; bool cmp(node a, node b){ re…

Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1844    Accepted Submission(s): 704 Problem Description In graph theory, a pseudoforest is an undirected graph in which every connec…

传送门: http://acm.hdu.edu.cn/showproblem.php?pid=3367 Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 3242    Accepted Submission(s): 1273 Problem Description In graph theory, a pseu…

题目:http://acm.hdu.edu.cn/showproblem.php?pid=1102 /************************************************************************/ /* hdu Constructing Roads 最小生成树 题目大意:在N个村子中已经存在部分存在连通,建最少长度的路使得所有的村子连通. 解题思路:已经连通的村子其中间的路径作为0,即修建的时候修建为0耗费,求这些节点的最小生成树. */ /*…