4
30 40
3
21
3
22
2
23
0
0
2
24
0
0
2
25
0
0
2
26
2
27
0
0
2
28
0
0
3
29
3
30
3
30
0
0
0
3
30
0
0
0
3
30
0
0
0
3
31
0
2
31
0
0
0
3
32
0
0
2
33
0
0