제출 #46328

1
6 5
1 2
1 3
4 5
5 6
6 4

YES

NO

2
5 3
1 4
3 1
1 2
4 4
2 1
2 3
1 4
3 1

YES
YES

YES
NO

3
3 1
1 2
6 9
2 6
2 4
4 1
1 3
2 3
2 5
2 1
5 1
6 1
4 3
4 1
1 2
3 1

YES
YES
YES

YES
NO
YES