hdu 2988 Dark roads

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题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=2988 Dark roads Description Economic times these days are tough, even in Byteland. To reduce the operating costs, the government of Byteland has decided to optimize the road lighting. Till now every road…

HDU 2988 Dark roads（kruskal模板题）

Dark roads Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1067 Accepted Submission(s): 474 Problem Description Economic times these days are tough, even in Byteland. To reduce the operating…

HDU 2988 Dark roads （裸的最小生成树）

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2988 解题报告:一个裸的最小生成树,没看题,只知道结果是用所有道路的总长度减去最小生成树的长度和. #include<cstdio> #include<cstring> #include<iostream> #include<algorithm> using namespace std; ; ]; struct node { int front,rear,len…

HDU 2988.Dark roads-最小生成树(Kruskal)

最小生成树: 中文名最小生成树外文名 Minimum Spanning Tree,MST 一个有 n 个结点的连通图的生成树是原图的极小连通子图,且包含原图中的所有 n 个结点,并且有保持图连通的最少的边. 最小生成树可以用kruskal(克鲁斯卡尔)算法或prim(普里姆)算法求出. 最小生成树其实是最小权重生成树的简称. 应用: 生成树和最小生成树有许多重要的应用. 例如:要在n个城市之间铺设光缆,主要目标是要使这 n 个城市的任意两个之间都可以通信,但铺设光缆的费用很高,且各个…

【HDOJ】2988 Dark roads

最小生成树. /* */ #include <iostream> #include <string> #include <map> #include <queue> #include <set> #include <stack> #include <vector> #include <deque> #include <algorithm> #include <cstdio> #inclu…

Dark roads（kruskal）

Dark roads Time Limit : 2000/1000ms (Java/Other) Memory Limit : 32768/32768K (Java/Other) Total Submission(s) : 7 Accepted Submission(s) : 2 Problem Description Economic times these days are tough, even in Byteland. To reduce the operating costs,…

HDU 1102 Constructing Roads， Prim+优先队列

题目链接:HDU 1102 Constructing Roads Constructing Roads Problem Description There are N villages, which are numbered from 1 to N, and you should build some roads such that every two villages can connect to each other. We say two village A and B are conne…