제출 #44634

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

YES
NO

YES
YES

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

NO
YES

YES
YES

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

NO
NO

YES
YES