8
  0.0   0.0
 20.0   0.0
 40.0   0.0
 60.0   0.0
 80.0   0.0
 20.0  20.0
 40.0  20.0
 60.0  20.0
13
1 2
2 3
3 4
4 5
1 6
2 6
3 6
3 7
3 8
4 8
5 8
6 7
7 8
4
1 0
1 1
5 0
5 1
2000.0
1
2 0 -1000