A13145. Happy Cactus
编程题
普及/提高-
知识点
题目描述
You are given a cactus graph, in this graph each edge lies on at most one simple cycle.
It is given as $m$ edges $a_i, b_i$ , weight of $i$ -th edge is $i$ .
Let's call a path in cactus increasing if the weights of edges on this path are increasing.
Let's call a pair of vertices $(u,v)$ happy if there exists an increasing path that starts in $u$ and ends in $v$ .
For each vertex $u$ find the number of other vertices $v$ , such that pair $(u,v)$ is happy.
It is given as $m$ edges $a_i, b_i$ , weight of $i$ -th edge is $i$ .
Let's call a path in cactus increasing if the weights of edges on this path are increasing.
Let's call a pair of vertices $(u,v)$ happy if there exists an increasing path that starts in $u$ and ends in $v$ .
For each vertex $u$ find the number of other vertices $v$ , such that pair $(u,v)$ is happy.
输入格式
The first line of input contains two integers $n,m$ ( $1 \leq n, m \leq 500\,000$ ): the number of vertices and edges in the given cactus.
The next $m$ lines contain a description of cactus edges, $i$ -th of them contain two integers $a_i, b_i$ ( $1 \leq a_i, b_i \leq n, a_i \neq b_i$ ).
It is guaranteed that there are no multiple edges and the graph is connected.
The next $m$ lines contain a description of cactus edges, $i$ -th of them contain two integers $a_i, b_i$ ( $1 \leq a_i, b_i \leq n, a_i \neq b_i$ ).
It is guaranteed that there are no multiple edges and the graph is connected.
输出格式
Print $n$ integers, required values for vertices $1,2,\ldots,n$ .
输入输出样例
输入 #1
3 3 1 2 2 3 3 1
输出 #1
2 2 2
输入 #2
5 4 1 2 2 3 3 4 4 5
输出 #2
4 4 3 2 1