제출 #36368

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

YES

NO

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

YES
NO

YES
YES

3
7 1
3 1
2 1
1 2
2 1
2 1

YES
NO
NO

YES
YES
YES