Automatic version	Center problem	Empty circle, Largest empty circle	Largest empty ellipse
Click version	Center problem	Empty circle, Largest empty circle	-

Voronoi diagram(Automatic version)�EVoronoi diagram(Click version)
Farthest point Voronoi diagram(Automatic version)�EFarthest point Voronoi diagram(Click version)
Elliptic Voronoi diagram(Automatic version)