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…

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…

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…

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…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=1102 Constructing Roads Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 27178    Accepted Submission(s): 10340 Problem Description There are N vil…

The Head Elder of the tropical island of Lagrishan has a problem. A burst of foreign aid money was spent on extra roads between villages some years ago. But the jungle overtakes roads relentlessly, so the large road network is too expensive to mainta…

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 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1031    Accepted Submission(s): 450 Problem Description Economic times these days are tough, even in Byteland. To reduce the operating…

Jungle Roads 题目链接: http://acm.hust.edu.cn/vjudge/contest/124434#problem/A http://acm.hust.edu.cn/vjudge/contest/124434#problem/L Description The Head Elder of the tropical island of Lagrishan has a problem. A burst of foreign aid money was spent on e…

题解 这是一道裸的最小生成树题,拿来练手,题目就不放了 个人理解  Prim有些类似最短路和贪心,不断找距当前点最小距离的点 Kruskal类似于并查集,不断找最小的边,如果不是一棵树的节点就合并为一颗树 AC代码: Prim算法: #include<iostream> #include<cstdio> //EOF,NULL #include<cstring> //memset #include<cstdlib> //rand,srand,system,it…