제출 #144778

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

YES
YES

NO
YES

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

YES
YES

YES
NO

2
8 5
1 5
1 6
5 2
2 4
1 4
3 3
3 1
3 2
1 2

YES
YES

YES
NO