6
convex
6
1 0.5 0.75 0.625 0.75 
2 0.625 0.75 0.625 0.625 
3 0.625 0.625 0.5 0.5 
4 0.5 0.5 0.375 0.5 
5 0.375 0.5 0.375 0.625 
6 0.375 0.625 0.5 0.75
