제출 #12688

4
1 2
3 2
4 1

0
0
0

1
2
1

5
2 5
4 1
3 2
1 2

0
0
0
0

1
2
1
2

5
5 2
2 1
4 1
3 2

1
1
2
2

1
2
1
2