제출 #139954

2
2 1
2 1
6 1
4 1

YES
NO

YES
YES

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

YES
YES

YES
NO

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

YES
YES
NO

YES
YES
YES