题目就是求一副图的割边,然后对于那些有重复的边的,不能算做割边. 思路就是每次加入一条边的时候,判断这条边是否存在过,存在过的话,就把那条边设为inf,表示不能作为割边.于是有了这样的代码 #include <cstdio> #include <cstdlib> #include <cstring> #include <cmath> #include <algorithm> using namespace std; #define inf (0x…

<题目链接> 题目大意: 给定一个无向图,让你尽可能的删边,但是删边之后,仍然需要保证图的连通性,输出那些不能被删除的边. 解题分析: 就是无向图求桥的题目,主要是提高一下处理重边的姿势. #include <bits/stdc++.h> using namespace std; #define pb push_back #define clr(a,b) memset(a,b,sizeof(a)) #define rep(i,s,t) for(int i=s;i<=t;i++…

题目链接:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=1588 题意:Ferry王国有n个岛,m座桥,每个岛都可以互达,现在要烧毁一些桥使得,但烧毁后每个岛仍可以互达,问哪些桥肯定不会被烧毁. 分析:给定一个无向连通图,要求图中的割边.注意,图中可能有重边,只要顶点u和v之间有重边,则这些重边任何一条都不可能是割边.这题的输出比较坑,pe了好多次... AC代码: #include<cstdio> #include<…

Burning Bridges Time Limit: 5 Seconds Memory Limit: 32768 KB Ferry Kingdom is a nice little country located on N islands that are connected by M bridges. All bridges are very beautiful and are loved by everyone in the kingdom. Of course, the system o…

Burning Bridges 给出含有n个顶点和m条边的连通无向图,求出所有割边的序号. 1 #include <cstdio> 2 #include <cstring> 3 #define clr(a) memset(a,0,sizeof(a)) 4 #define N 10005 5 #define M 100005 6 #define MIN(a,b) ((a)>(b)?(b):(a)) 7 typedef struct NodeStr //边结点 8 { 9 int…

题目地址:ZOJ 2588 由于数组开小了而TLE了..这题就是一个求无向连通图最小割边.仅仅要推断dfn[u]是否<low[v],由于low指的当前所能回到的祖先的最小标号,增加low[v]大于dfn[u]时,说明v无法通过其它边回到u之前的点.也就是说v假设想要回到u的祖先点.必需要经过u点,那这条边非常明显就是一条割边.这题还要去重边,假如有重边的话.说明怎么销毁哪条边总能通过还有一条边,所以仅仅要有重边.说明这两点之间没有割边. 代码例如以下: #include <iostream&g…

Burning Bridges Time Limit: 5 Seconds      Memory Limit: 32768 KB Ferry Kingdom is a nice little country located on N islands that are connected by M bridges. All bridges are very beautiful and are loved by everyone in the kingdom. Of course, the sys…

Burning Bridges Time Limit: 5 Seconds      Memory Limit: 32768 KB Ferry Kingdom is a nice little country located on N islands that are connected by M bridges. All bridges are very beautiful and are loved by everyone in the kingdom. Of course, the sys…

Burning Bridges Time Limit: 5000ms Memory Limit: 32768KB This problem will be judged on ZJU. Original ID: 258864-bit integer IO format: %lld      Java class name: Main   Ferry Kingdom is a nice little country located on N islands that are connected b…

题目地址:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=2588 Burning Bridges Time Limit: 5 Seconds      Memory Limit: 32768 KB Ferry Kingdom is a nice little country located on N islands that are connected by M bridges. All bridges are very…