POJ-1751 Highways---确定部分边的MST

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POJ 1751 Highways （ZOJ 2048 ） MST

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…

POJ 1751 Highways (最小生成树)

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…

POJ 1751 Highways （最小生成树）

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…

POJ 1751 Highways (kruskal)

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…

POJ 1751 Highways 【最小生成树 Kruskal】

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…

(poj) 1751 Highways

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…

POJ 1751 Highways(最小生成树Prim普里姆，输出边)

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…

POJ 1751 Highways（最小生成树&Prim）题解

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…

（最小生成树 Prim） Highways --POJ --1751

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…

POJ 1258 Agri-Net|| POJ 2485 Highways MST

POJ 1258 Agri-Net http://poj.org/problem?id=1258 水题. 题目就是让你求MST,连矩阵都给你了. prim版 #include<cstdio> const int MAXN=101; const int INF=100000+10; int map[MAXN][MAXN]; int dis[MAXN]; int n; void prim() { bool vis[MAXN]={0}; for(int i=0;i<=n;i++) dis[i]…

poj 1751 输出MST中新加入的边

给出结点的坐标以及已建好的边要输出MST中加入的边(已建好的边就不用输出了)结点的编号从1开始注意这题只有一组数据不能用多组输入否则就超时(在这被坑惨了Orz) Sample Input 91 50 0 3 24 55 10 45 21 25 331 39 71 2Sample Output 1 63 74 95 78 3 # include <iostream> # include <cstdio> # include <cstring> # include…

H - Highways - poj 1751（prim）

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 ****************************************************************************** #…

Highways POJ - 1751

题目链接:https://vjudge.net/problem/POJ-1751 思路: 最小生成树板子,只需要多记录每个dis[x]的权值是从哪个点到x这个点的. #include <stdio.h> #include <iostream> #include <queue> #include <math.h> #include <algorithm> using namespace std; ; const int inf = (int)1e9…

poj 2485 Highways

题目连接 http://poj.org/problem?id=2485 Highways 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…

POJ 2485 Highways【最小生成树最大权——简单模板】

链接: http://poj.org/problem?id=2485 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=22010#problem/H Highways Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 18668 Accepted: 8648 Description The island nation of Flatopia is perfect…

POJ 2485 Highways && HDU1102（20/200）

题目链接:Highways 没看题,看了输入输出.就有种似曾相识的感觉,果然和HDU1102 题相似度99%,可是也遇到一坑 cin输入居然TLE,cin的缓存不至于这么狠吧,题目非常水.矩阵已经告诉你了.就敲个模板就是了,5分钟.1A 题意就是打印,最小生成树的最大边权.改了改输入,水过这个题完了.我的个人POJ计划进度以完毕 20/200,这当中主要是图论的题.等下周把POJ计划图论的题目打完,就回头打模拟!我就不信还能比图论难 #include <iostream> #include…

poj 2485 Highways 最小生成树

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.…

poj 2485 Highways （最小生成树）

链接:poj 2485 题意:输入n个城镇相互之间的距离,输出将n个城镇连通费用最小的方案中修的最长的路的长度这个也是最小生成树的题,仅仅只是要求的不是最小价值,而是最小生成树中的最大权值.仅仅须要加个推断比較最小生成树每条边的大小即可 kruskal算法 #include<cstdio> #include<algorithm> using namespace std; int f[510],n,m; struct stu { int a,b,c; }t[20100]; int…

POJ 2485 Highways（最小生成树）

题目链接 Description The islandnation of Flatopia is perfectly flat. Unfortunately, Flatopia has no publichighways. So the traffic is difficult in Flatopia. The Flatopian government isaware of this problem. They're planning to build some highways so that…

快速切题 poj 2485 Highways prim算法+堆不完全优化难度:0

Highways Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 23033 Accepted: 10612 Description The island nation of Flatopia is perfectly flat. Unfortunately, Flatopia has no public highways. So the traffic is difficult in Flatopia. The Fl…

POJ 2485 Highways(最小生成树+ 输出该最小生成树里的最长的边权)

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

POJ 2485 Highways (求最小生成树中最大的边）

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…

POJ 2485 Highways 最小生成树（Kruskal）