제출 #143475

2
2
2 1
1 1
2
2 1
2 1

1
2

12

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

3
1

31

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

3
-1

3
5