제출 #64744

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

curr: 6
NO

NO

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

curr: 2
NO
YES

NO
YES

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

YES
curr: 4
NO

YES
NO