1013. Battle Over Cities (25) 时间限制 400 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that cit…

1013. Battle Over Cities (25) 时间限制 400 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that cit…

It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any other highways to keep the rest of…

//采用不同的图存储结构结构邻接矩阵.邻接表分别dfs,我想我是寂寞了吧,应该试试并查集,看见可以用并查集的就用dfs,bfs代替......怕了并查集了 //邻接矩阵dfs #include<cstdio>#include<algorithm>using namespace std;const int maxn=1001;int g[maxn][maxn];int n,tmp;bool vis[maxn];void dfs(int v){ vis[v]=true; for(int…

这道题目的意思是:在战争时代,如果一个城市被敌人占领了,那么和该城市相连的道路都必须关闭,我们必须把剩下的城市(即不包括被敌人占领的城市)连接起来. 举个例子,我们有3个城市,C1,C2,C3,C1和C2相连,C1和C3相连.如果C1被敌人占领了,那么C2,C3就孤立了,C1是敌人的城市了,C2,C3是我们的城市,那么在C1被敌人占领的情况下,我们需要修一条路,即C2---C3之间连接起来…

1013. Battle Over Cities (25) t is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any other…

在敌人占领之前由城市和公路构成的图是连通图.在敌人占领某个城市之后所有通往这个城市的公路就会被破坏,接下来可能需要修复一些其他被毁坏的公路使得剩下的城市能够互通.修复的代价越大,意味着这个城市越重要.如果剩下的城市无法互通,则说明代价无限大,这个城市至关重要.最后输出的是代价最大的城市序号有序列表.借助并查集和Kruskal算法(最小生成树算法)来解决这个问题. //#include "stdafx.h" #include <iostream> #include <a…

1013 Battle Over Cities (25 分)   It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any o…

1013 Battle Over Cities (25)(25 分) It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any…

Battle Over Cities It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any other highways…