Network Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 10907   Accepted: 5042 Description A Telephone Line Company (TLC) is establishing a new telephone cable network. They are connecting several places numbered by integers from 1 to N…

题目链接: http://poj.org/problem?id=1144 思路分析:该问题要求求出无向联通图中的割点数目,使用Tarjan算法即可求出无向联通图中的所有的割点,算法复杂度为O(|V| + |E|): 代码如下: #include <cstdio> #include <vector> #include <cstring> #include <iostream> using namespace std; + ; + ; char str[MAX_…

题目地址:id=1144">POJ 1144 求割点.推断一个点是否是割点有两种推断情况: 假设u为割点,当且仅当满足以下的1条 1.假设u为树根,那么u必须有多于1棵子树 2.假设u不为树根.那么(u,v)为树枝边.当Low[v]>=DFN[u]时. 然后依据这两句来找割点就能够了. 代码例如以下: #include <iostream> #include <cstdio> #include <string> #include <cstri…

Network Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 12707   Accepted: 5835 Description A Telephone Line Company (TLC) is establishing a new telephone cable network. They are connecting several places numbered by integers from 1 to N…

Network Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 8797   Accepted: 4116 Description A Telephone Line Company (TLC) is establishing a new telephone cable network. They are connecting several places numbered by integers from 1 to N .…

题目链接:poj 1144 题意就是说有 n(标号为 1 ~ n)个网点连接成的一个网络,critical places 表示删去后使得图不连通的顶点,也就是割顶,求图中割顶的个数. 直接上大白书上的模板即可,只是输入也有点卡人,我竟然傻傻的用手写的输入挂来处理,看了别人的博客才知道用 scanf("%s") 即可,因为 scanf("%s") 不会读入空格,再适当处理下即可. 我的代码是: #include<cstdio> #include<cs…

题目地址:http://poj.org/problem?id=1144 题目:输入一个n,代表有n个节点(如果n==0就结束程序运行). 在当下n的这一组数据,可能会有若干行数据,每行先输入一个节点a, 接下来先输入一个字符,再输入一个数b, 表示a与b是连通的,如果输入的字符是空格就继续本行的输入,如果是'\n',就结束本行的输入.(可以看本题目 最后的提示部分) 建完图后就是进行tarjan的dfs算法了,是割点的标记一下,割边就不用管了. code: #include <iostream>…

Network Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 11042   Accepted: 5100 Description A Telephone Line Company (TLC) is establishing a new telephone cable network. They are connecting several places numbered by integers from 1 to N…

Network Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 17016   Accepted: 7635 Description A Telephone Line Company (TLC) is establishing a new telephone cable network. They are connecting several places numbered by integers from 1 to N…

Network Description A Telephone Line Company (TLC) is establishing a new telephone cable network. They are connecting several places numbered by integers from 1 to N . No two places have the same number. The lines are bidirectional and always connect…