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…

Highways 题目链接: http://acm.hust.edu.cn/vjudge/contest/124434#problem/G 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 an…

题目链接:http://poj.org/problem?id=1751 题意是给你n个点的坐标,然后给你m对点是已经相连的,问你还需要连接哪几对点,使这个图为最小生成树. 这里用kruskal不会超时,用prim应该会超时,特别注意在输入的时候不要多组输入,否则会TLE. #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <vec…

http://poj.org/problem?id=1751 http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=2048 题目大意: 给你n个点的坐标,并且m个点之间已经建立起连接,让你输出剩下的MST的连接点. 两题其实一样.就输入一点点不同. 因为题目采用Special Judge故水题一题. POJ: #include<cstdio> #include<cmath> #include<algorit…

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 some of the…

Highways Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 23070   Accepted: 6760   Special Judge Description The island nation of Flatopia is perfectly flat. Unfortunately, Flatopia has a very poor system of public highways. The Flatopian…

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…

思路: 一开始用Kruskal超时了,因为这是一个稠密图,边的数量最惨可能N^2,改用Prim. Prim是这样的,先选一个点(这里选1)作为集合A的起始元素,然后其他点为集合B的元素,我们要做的就是每次找到B中的一个点,满足这个点到A的权值是B到A的权值中最小的,然后我们把这个点加入到A,再更新B中的点到A的最小距离. 代码: #include<cstdio> #include<cmath> #include<cstring> #include<iostream…

链接: http://poj.org/problem?id=1751 Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 11507   Accepted: 3279   Special Judge Description The island nation of Flatopia is perfectly flat. Unfortunately, Flatopia has a very poor system of publ…

某个地方政府想修建一些高速公路使他们每个乡镇都可以相同通达,不过以前已经修建过一些公路,现在要实现所有的联通,所花费的最小代价是多少?(也就是最小的修建长度),输出的是需要修的路,不过如果不需要修建就什么都不输出. 分析:构建一个完全图,使用krusal进行一些简单优化不知道可以不,试一下吧 已经T成狗了 下面是TLE的krusal代码 ****************************************************************************** #…