제출 #34537

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

YES

NO

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

YES
YES

YES
NO

2
8 3
5 1
6 1
7 1
3 3
2 3
1 2
3 1

YES
YES

YES
NO