제출 #43822

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

YES
NO
NO

YES
NO
YES

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

NO
NO

NO
YES

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

YES
NO
NO

YES
NO
YES