#include "stdio.h". #include <iostream> #include<math.h> using namespace std; double dis[105][105]; double p[105][2];//点的坐标 double ans;//最短距离 int n; void makedis()//算出两个点之间的距离 { int i, j; double r; for (i = 0; i < n; i++) for (j =…

题目: There exists a world within our world A world beneath what we call cyberspace. A world protected by firewalls, passwords and the most advanced security systems. In this world we hide our deepest secrets, our most incriminating information, and of…

题目链接: http://poj.org/problem?id=1258 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 needs your help, of course. Farmer John ordered a high speed…

题目: 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设公路的若干条道路的成本.现请你编写程序,计算出全省畅通需要的最低成本.  Input测试输入包含若干测试用例.每个测试用例的第1行给出评估的道路条数 N.村庄数目M ( < 100 ):随后的 N 行对应村庄间道路的成本,每行给出一对正整数,分别是两个村庄的编号,以及此两村庄间道路的成本(也是正整数).为简单起见,村庄从1到…

主题链接:problemId=203" target="_blank">ZOJ 1203 Swordfish 旗鱼 Swordfish Time Limit: 2 Seconds      Memory Limit: 65536 KB There exists a world within our world A world beneath what we call cyberspace. A world protected by firewalls, password…

题目: In the planet w-503 of galaxy cgb, there is a kind of intelligent creature named QS. QScommunicate with each other via networks. If two QS want to get connected, they need to buy two network adapters (one for each QS) and a segment of network cab…

题目: There exists a world within our world A world beneath what we call cyberspace. A world protected by firewalls, passwords and the most advanced security systems. In this world we hide our deepest secrets, our most incriminating information, and of…

http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=1203 大意: 给出一些点,求MST 把这几天的MST一口气发上来. kruskal #include<cstdio> #include<cmath> #include<algorithm> using namespace std; const int MAXN=101; const int INF=9999999; int fa[MAXN]; s…

题目: There are N (2<=N<=600) cities,each has a value of happiness,we consider two cities A and B whose value of happiness are VA and VB,if VA is a prime number,or VB is a prime number or (VA+VB) is a prime number,then they can be connected.What's mor…

题目: 老 Jack 有一片农田,以往几年都是靠天吃饭的.但是今年老天格外的不开眼,大旱.所以老 Jack 决定用管道将他的所有相邻的农田全部都串联起来,这样他就可以从远处引水过来进行灌溉了.当老 Jack 买完所有铺设在每块农田内部的管道的时候,老 Jack 遇到了新的难题,因为每一块农田的地势高度都不同,所以要想将两块农田的管道链接,老 Jack 就需要额外再购进跟这两块农田高度差相等长度的管道. 现在给出老 Jack农田的数据,你需要告诉老 Jack 在保证所有农田全部可连通灌溉的情况下,…