Graph I - Connected Components

Time Limit : 1 sec, Memory Limit : 65536 KB
Japanese version is here

Connected Components

Write a program which reads relations in a SNS (Social Network Service), and judges that given pairs of users are reachable each other through the network.


In the first line, two integer $n$ and $m$ are given. $n$ is the number of users in the SNS and $m$ is the number of relations in the SNS. The users in the SNS are identified by IDs $0, 1, ..., n-1$.

In the following $m$ lines, the relations are given. Each relation is given by two integers $s$ and $t$ that represents $s$ and $t$ are friends (and reachable each other).

In the next line, the number of queries $q$ is given. In the following $q$ lines, $q$ queries are given respectively. Each query consists of two integers $s$ and $t$ separated by a space character.


For each query, print "yes" if $t$ is reachable from $s$ through the social network, "no" otherwise.


  • $2 \leq n \leq 100,000$
  • $0 \leq m \leq 100,000$
  • $1 \leq q \leq 10,000$

Sample Input

10 9
0 1
0 2
3 4
5 7
5 6
6 7
6 8
7 8
8 9
0 1
5 9
1 3

Sample Output