摘要： 这两题是一样的，代码完全一样。就是给了一个连通图，问加多少条边可以变成边双连通。去掉桥，其余的连通分支就是边双连通分支了。一个有桥的连通图要变成边双连通图的话，把双连通子图收缩为一个点，形成一颗树。需要加的边为(leaf+1)/2 (leaf为叶子结点个数)POJ 3177 给定一个连通的无向图G，至少要添加几条边，才能使其变为双连通图。参考：http://blog.csdn.net/lyy289065406/article/details/6762432http://www.cnblogs.com/kuangbin/p/3184889.html#include #include #inclu 阅读全文

摘要： 原文地址：https://www.byvoid.com/blog/biconnect图的割点、桥与双连通分支[点连通度与边连通度]在一个无向连通图中，如果有一个顶点集合，删除这个顶点集合，以及这个集合中所有顶点相关联的边以后，原图变成多个连通块，就称这个点集为割点集合。一个图的点连通度的定义为，最小割点集合中的顶点数。类似的，如果有一个边集合，删除这个边集合以后，原图变成多个连通块，就称这个点集为割边集合。一个图的边连通度的定义为，最小割边集合中的边数。[双连通图、割点与桥]如果一个无向连通图的点连通度大于1，则称该图是点双连通的(point biconnected)，简称双连通或重连通。一个 阅读全文

摘要： NetworkTime Limit:5000MSMemory Limit:65536KTotal Submissions:5619Accepted:1939DescriptionA network administrator manages a large network. The network consists of N computers and M links between pairs of computers. Any pair of computers are connected directly or indirectly by successive links, so dat 阅读全文

摘要： Critical LinksIn a computer network a link L, which interconnects two servers, is considered critical if there are at least two servers A and B such that all network interconnection paths between A and B pass through L. Removing a critical link generates two disjoint sub-networks such that any two s 阅读全文

摘要： NetworkA Telephone Line Company (TLC) is establishing a new telephone cable network. They are connecting several places numbered by integers from 1 toN. No two places have the same number. The lines are bidirectional and always connect together two places and in each place the lines end in a telepho 阅读全文