8 28

1.0   0
2.0   4
3.0   5
4.0   7
2.0   1
3.0   2
3.0   1
3.0   2
4.0   4
5.0   6
4.0   3
5.0   4
6.0   5
2.0   0
4.0   2
5.0   3
5.0   4
3.0   0
6.0   3
6.0   5
7.0   6
8.0   7
5.0   2
7.0   5
7.0   6
4.0   0
8.0   5
8.0   7

0
4
6
10
13
17
22
25
28