http://poj.org/problem?id=1751 Description The island nation of Flatopia is perfectly flat. Unfortunately, Flatopia has a very poor system of public highways. The Flatopian government is aware of this problem and has already constructed a number of h…

题意: 给你N个城市的坐标,城市之间存在公路,但是由于其中一些道路损坏了,需要维修,维修的费用与公路长成正比(公路是直的). 但现有M条公路是完整的,不需要维修,下面有M行,表示不需要维修的道路两端的城市,问最短费用. 思路: lowcost[i]数组存还未处理的城市i离已经处理过的城市的最短距离,pre[i]]数组存还未处理的城市i离已经处理过的哪个城市最近. 代码: prime: #include <iostream> #include <cstdio> #define inf…

Highways Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 14819   Accepted: 4278   Special Judge Description The island nation of Flatopia is perfectly flat. Unfortunately, Flatopia has a very poor system of public highways. The Flatopian…

Highways Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 13182   Accepted: 3814   Special Judge Description The island nation of Flatopia is perfectly flat. Unfortunately, Flatopia has a very poor system of public highways. The Flatopian…

                                                                                                                Highways Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 23426   Accepted: 10829 Description The island nation of Flatopia is…

Description The island nation of Flatopia is perfectly flat. Unfortunately, Flatopia has no public highways. So the traffic is difficult in Flatopia. The Flatopian government is aware of this problem. They're planning to build some highways so that i…

题目链接:点击打开链接 Description The island nation of Flatopia is perfectly flat. Unfortunately, Flatopia has a very poor system of public highways. The Flatopian government is aware of this problem and has already constructed a number of highways connecting…

点击打开链接 Highways Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 19004   Accepted: 8815 Description The island nation of Flatopia is perfectly flat. Unfortunately, Flatopia has no public highways. So the traffic is difficult in Flatopia.…

Highways Time Limit:1000MS     Memory Limit:10000KB     64bit IO Format:%I64d & %I64u Submit Status Practice POJ 1751 Appoint description:  System Crawler  (2015-06-02) Description The island nation of Flatopia is perfectly flat. Unfortunately, Flato…

题目链接:http://www.spoj.pl/problems/HIGH/ 题意:求最小生成树个数. #include<algorithm> #include<cstdio> #include<cmath> #include<cstring> #include<iostream> #define ll long long ][]; int n,m; ; int zero(double x){ ; else return x>eps; }…