P2746 [USACO5.3]校园网Network of Schools// POJ1236: Network of Schools 题目描述 一些学校连入一个电脑网络.那些学校已订立了协议:每个学校都会给其它的一些学校分发软件(称作“接受学校”).注意即使 B 在 A 学校的分发列表中, A 也不一定在 B 学校的列表中. 你要写一个程序计算,根据协议,为了让网络中所有的学校都用上新软件,必须接受新软件副本的最少学校数目(子任务 A).更进一步,我们想要确定通过给任意一个学校发送新软件,这个…
Network of Schools Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 27121 Accepted: 10704 Description A number of schools are connected to a computer network. Agreements have been developed among those schools: each school maintains a l…
Network of Schools Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 5354 Accepted: 2106 Description A number of schools are connected to a computer network. Agreements have been developed…
Network of Schools Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 16343 Accepted: 6484 Description A number of schools are connected to a computer network. Agreements have be…
Network of Schools 题意:若干个学校组成一个计算机网络系统,一个学校作为出发端连接着若干个学校,信息可以传送到这些学校.被链接的学校不需要再次与出发端相连,现在问你:A:最少选几个学校作为出发端其他所有的学校都能接收到信息,B:如果任意选一个学校作为出发端使得其他所有学校都能接收到信息,最少需要再搭建几条网线. 思路:用Tarjan算法求出所有的连通分量,然后将这些分量作为一个点进行连接(缩点).答案A既是入度为0的点的数量,答案B:一条网线可以作为一个出度和一个入度,所以答案…
题目链接:http://poj.org/problem?id=1236 Network of Schools Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 19859 Accepted: 7822 Description A number of schools are connected to a computer network. Agreements have been developed among those…
A number of schools are connected to a computer network. Agreements have been developed among those schools: each school maintains a list of schools to which it distributes software (the “receiving schools”). Note that if B is in the distribution lis…
