제출 #139952

2
3 1
2 1
4 2
1 4
3 1

YES
NO

YES
YES

2
3 1
2 1
7 3
4 3
1 4
4 2

YES
NO

YES
YES

2
2 1
1 2
9 3
2 1
1 4
3 1

YES
NO

YES
YES