제출 #64733

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

YES

NO

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

YES
YES

NO
YES

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

YES
YES

NO
YES