20
0, 0, 0
0.5, 0, 0.2
1, 0, 0.3
1, 0.2, 0.4
0.9, 0.3, 0.5
1, 0.3, 0.6
1.2, 0.4, 0.65
1.4, 0.5, 0.7
1.6, 0.6, 0.75
1.6, 0.7, 1
1.8, 0.8, 1.25
2.0, 0.9, 1.5
3.0, 1.0, 1.75
5.0, 2.0, 2.0
3.5, 3.0, 1.75
2.0, 4.0, 1.5
1.6, 5.0, 1.25
1.5, 6.0, 1.0
1.2, 7.0, 0.75
1.0, 8.0, 0.75
