제출 #65607

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

YES

NO

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

YES
YES

NO
YES

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

YES
NO

YES
YES