SPF Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 8139 Accepted: 3723 Description Consider the two networks shown below. Assuming that data moves around these networks only between directly connected nodes on a peer-to-peer basis, a…
#include<bits/stdc++.h> using namespace std; typedef long long ll; int n,m; ; ; struct node { int to; int nxt; }e[maxm]; int head[maxn]; int tot; int id; int root; int low[maxn]; int num[maxn]; bool vis[maxn]; int pa[maxn]; ; int art[maxn]; void ini…
SPF Description Consider the two networks shown below. Assuming that data moves around these networks only between directly connected nodes on a peer-to-peer basis, a failure of a single node, 3, in the network on the left would prevent some of the s…
POJ1523 题意很简单,求删除割点后原先割点所在的无向连通图被分成了几个连通部分(原题说prevent at least one pair of available nodes from being able to communicate on what was previously a fully connected network,阻止至少一对可用节点能够在先前完全连接的网络上进行通信,所以输入的图不保证连通) 对于每个割点 如果它是根节点,则答案=DFS树的子树数量 如果它是非根节点,…
题目链接:http://poj.org/problem?id=1523 SPF:A Single Point of Failure也就是割点(一个点导致网络之间的不连通),由于给出的图是无向图,所以只要连通就一定强连通.要求连通分支的数量就是要求请联通分支的数量,我们可想到tarjan求强连通的步骤,只要一群结点的low值相同他们就是属于同一个SCC(Strongly Connected Component),所以我们只要对于每一个割点,记录一下这个点所到的其他结点的不相同的low值的数量,就是…
儿子数大于1的树根或者 Low[v] >= DFN[u]的非树根节点v 就是割点. #include <cstdio> #include <cstring> const int N = 1001; const int M = 1000010; struct Edge { int to,next; bool cut;//是否为桥的标记 }edge[M]; int head[N],tot; int Low[N],DFN[N],Stack[N]; int Index,top; bo…
描述 Consider the two networks shown below. Assuming that data moves around these networks only between directly connected nodes on a peer-to-peer basis, a failure of a single node, 3, in the network on the left would prevent some of the still availabl…
SPF Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 7136 Accepted: 3255 Description Consider the two networks shown below. Assuming that data moves around these networks only between directly connected nodes on a peer-to-peer basis, a…
TWO NODES Time Limit: 24000/12000 MS (Java/Others) Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 2072 Accepted Submission(s): 683 Problem Description Suppose that G is an undirected graph, and the value of stab is defined as fol…
Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 8254 Accepted: 3772 Description Consider the two networks shown below. Assuming that data moves around these networks only between directly connected nodes on a peer-to-peer basis, a fail…
