제출 #20820

8 3
4 1
7 8
5 7
0 0

11
5
15
12
0

11
5
15
12

8 7
2 1
1 1
5 2
9 4
0 0

15
3
2
7
13
0

15
3
2
7
13

9 9
7 9
5 3
7 3
1 1
9 2
0 0

18
16
8
10
2
11
0

18
16
8
10
2
11