제출 #114345

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

YES
NO

YES
YES

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

YES
NO

YES
YES

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

YES
NO

YES
YES