poj 1251  && hdu 1301 Sample Input 9 //n 结点数A 2 B 12 I 25B 3 C 10 H 40 I 8C 2 D 18 G 55D 1 E 44E 2 F 60 G 38F 0G 1 H 35H 1 I 353A 2 B 10 C 40B 1 C 200Sample Output 21630 prim算法 # include <iostream> # include <cstdio> # include <cstr…

还是畅通工程 Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 71235    Accepted Submission(s): 32197 Problem Description 某省调查乡村交通状况,得到的统计表中列出了任意两村庄间的距离.省政府"畅通工程"的目标是使全省任何两个村庄间都可以实现公路交通(但不一定有直接的公路…

Description You are assigned to design network connections between certain points in a wide area. You are given a set of points in the area, and a set of possible routes for the cables that may connect pairs of points. For each possible route between…

Agri-Net Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 45050   Accepted: 18479 Description Farmer John has been elected mayor of his town! One of his campaign promises was to bring internet connectivity to all farms in the area. He nee…

POJ - 1287超级模板题 大概意思就是点的编号从1到N,会给你m条边,可能两个点之间有多条边这种情况,求最小生成树总长度? 这题就不解释了,总结就算,prim是类似dijkstra,从第一个点出发,每次走这个点没走过的最小边权值,这样不断找下去就可以找出,本质就是贪心算法 而kruskal是利用并查集,先按照边权值大小排序,然后从小的边开始往里面添加边,利用并查集判断是否在一个联通分量里面(就是是否相连)如果不相 连就建立边,从而建图,注意,节点编号如果是从1->n,那么相应初始化就应该从…

题目链接:http://poj.org/problem?id=1789 大意: 不同字符串相同位置上不同字符的数目和是它们之间的差距.求衍生出全部字符串的最小差距. #include<stdio.h> #include<math.h> #include<algorithm> using namespace std; ; int cnt; int pre[MAXN]; ]; struct Edge { int from, to; int val; }edge[MAXN *…

<题目链接> 题目大意: 有n个人,每个人都有一个或者几个能够归属的分类,将这些人分类到他们能够归属的分类中后,使所含人数最多的分类值最小,求出该分类的所含人数值. 解题分析: 看到求最大最小的问题,我们首先会想到二分答案,二分枚举所含人数最大的分块中所含人的数量,然后,根据枚举出的数量,进行二分图的多重匹配,如果当前分块所含人数<枚举的上限,那么就暂时将该人分配当前分块,如果当前分块已满,那么就枚举当前分块中的所有人,看是否能够将其分配到其它分块,如果可以,那么就将正在匹配的人分配到那…

A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:  In the figure, each node is labeled with an integer from {1, 2,...,16}. Node 8 is the root of the tree. Node x is an ancestor of node y if n…

Description Advanced Cargo Movement, Ltd. uses trucks of different types. Some trucks are used for vegetable delivery, other for furniture, or for bricks. The company has its own code describing each type of a truck. The code is simply a string of ex…

畅通工程 Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 35957    Accepted Submission(s): 15971 Problem Description 省政府“畅通工程”的目标是使全省任何两个村庄间都可以实现公路交通(但不一定有直接的公路相连,只要能间接通过公路可达即可).经过调查评估,得到的统计表中列出了有可能建…