제출 #46398

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

YES

NO

2
3 3
2 3
2 1
3 1
9 2
3 1
1 2

YES
YES

NO
YES

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

YES
YES

YES
NO