제출 #38467

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

YES

NO

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

YES
YES

YES
NO

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

YES
YES

NO
YES