Y by
Shining tells Prajit a positive integer
. Prajit then tries to place n points such that no four points are concyclic and no
points are collinear in Euclidean plane, such that Shining cannot find a group of three points such that their circumcircle contains none of the other remaining points. Is he always able to do so?
(Prajit Adhikari, Nepal and Shining Sun, USA)


(Prajit Adhikari, Nepal and Shining Sun, USA)
This post has been edited 3 times. Last edited by AshAuktober, Saturday at 2:49 PM