제출 #32488

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

[[], [2, 3], [1], [1], [5, 6], [4, 6], [5, 4]]
NO

NO

3
2 1
1 2
2 1
2 1
2 1
2 1

[[], [2], [1]]
YES
[[], [2], [1]]
YES
[[], [2], [1]]
YES

YES
YES
YES

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

[[], [3], [3], [1, 2]]
YES
[[], [2], [1, 3, 4], [2, 4], [3, 2]]
NO

YES
NO