제출 #76632

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

Yes
Yes

YES
YES

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

Yes
No

YES
NO

2
3 1
2 1
7 5
6 2
2 5
2 4
2 3
2 1

Yes
Yes

YES
YES