19 2 0 0
1   1.0  17.0
2   7.0  17.0
3  12.0  20.0
4  17.0  25.0
5  18.5  23.5
6  13.0  18.0
7  21.0  18.0
8  21.0  16.0
9  14.0  16.0
10  9.0  13.0
11 14.0  10.0
12 21.0  10.0
13 21.0   8.0
14 13.0   8.0
15 18.5   2.5
16 17.0   1.0
17 12.0   6.0
18  7.0   9.0
19  1.0   9.0
19 0
1 1 2
2 2 3
3 3 4
4 4 5
5 5 6
6 6 7
7 7 8
8 8 9
9 9 10
10 10 11
11 11 12
12 12 13
13 13 14
14 14 15
15 15 16
15 16 17
17 17 18
18 18 19
19 19 1
0