Jungle Roads 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 expens…

Jungle Roads Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 23882   Accepted: 11193 Description 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 som…

时限: 1000MS   内存限制: 10000K 提交总数: 37001   接受: 17398 描述 热带岛屿拉格里山的首长有个问题.几年前,大量的外援花在了村庄之间的额外道路上.但是丛林不断地超越道路,因此庞大的道路网太昂贵而无法维护.老年人理事会必须选择停止维护一些道路.左上方的地图显示了目前正在使用的所有道路,以及每月维护这些道路的费用.当然,即使路线不像以前那么短,也需要采取某种方式在所有村庄之间保持通行.长老院长想告诉长老委员会每月要花多少钱才能维持连接所有村庄的道路.在上面的地图…

Jungle Roads Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 25993   Accepted: 12181 Description 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 som…

Jungle Roads Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 19536   Accepted: 8970 Description 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…

题意: 输入n,然后接下来有n-1行表示边的加边的权值情况.如A 2 B 12 I 25 表示A有两个邻点,B和I,A-B权值是12,A-I权值是25.求连接这棵树的最小权值. 思路: 一开始是在做莫队然后发现没学过最小生成树,就跑过来做模板题了... Kruskal的使用过程:先按权值大小排序,然后用并查集判断是否能加这条边 Kruskal详解博客:[贪心法求解最小生成树之Kruskal算法详细分析]---Greedy Algorithm for MST 考试周还在敲代码...我... upd…

题目链接 http://poj.org/problem?id=1251 题意 有n个村庄,村庄之间有道路连接,求一条最短的路径能够连接起所有村庄,输出这条最短路径的长度. 思路 最小生成树问题,使用普利姆算法(Prime)或者克鲁斯卡尔算法(Kruskal)解决. 代码 Prime算法: #include <algorithm> #include <iostream> #include <cstring> #include <cstdio> using na…

题意: 首先给你一个图,需要你求出最小生成树,首先输入n个节点,用大写字母表示各节点,接着说有几个点和它相连,然后给出节点与节点之间的权值.拿第二个样例举例:比如有3个节点,然后接下来有3-1行表示了边的情况,拿第一行来说:A 2 B 10 C 40表示A有2个邻点,B和C,AB权值是10,AC权值是40. 思路: 直接套prime算法模板和kuskal算法模板,然后处理下数据就可以了. 代码: prime: #include <iostream> #include <cstdio>…

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 9216    Accepted Submission(s): 6805 Problem Description The Head Elder of the tropical island of Lagrishan has a problem. A burst of foreign aid…

解题思路:看懂题意是关键,Kruskal算法,最小生成树模板. 上代码: #include<cstdio> #include<cstring> #include<algorithm> using namespace std; ; //边的最大值 ], n, k, vis[maxn], father[]; int Find(int x) { return father[x] == x ? x : father[x] = Find(father[x]); } struct…