OJ Board

I've got AC !!!

Here are some tests that I tried.

Input:
3 3
1 2
1 3
2 3
7 10
1 2
1 3
2 4
3 4
4 5
4 6
5 7
6 7
2 5
3 6
7 9
1 2
1 3
1 4
2 4
3 4
4 5
5 6
5 7
7 6
3 2
1 2
2 3
2 1
1 2
4 5
1 2
1 3
1 4
2 3
3 4
5 5
1 2
2 3
3 4
4 5
5 1
4 3
1 4
2 3
3 4
0 0

Output:
1

1 2
2 3
3 1
#
2

1 2
2 4
3 1
3 6
4 3
5 2
5 4
6 4
6 7
7 5 ...

Hi, I tried a lot of tests and I think the output is correct. Could you give me some test cases ??? Thanks !!