This month's challenge is by a frequent solver, Bert Dobbelaere. (Thanks!)
Put N points on integer coordinates of a rectangular grid of dimension L1xL2, so that no three points are collinear and the areas of the triangles formed by the C(N,3) possible triplets are all different.
For example, for N=4 and L1=L2=3, the following set of points is a solution: [[1,0],[1,1],[0,3],[3,3]]
You can play a game of a simple version of the challenge here.
A bonus '*' will be awarded to the solutions with the smallest area.
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26/09/2018 @ 12:00 PM EST Solution:
02/11/2018 @ 12:00 PM EST List Updated:
02/11/2018 @ 12:00 PM EST
People who answered correctly:
Harald Bögeholz (30/09/18 09:21 AM IDT) Oleg Vlasii (02/10/18 07:44 AM IDT) Vladimir Volevich (04/10/18 01:07 PM IDT) Dominik Reichl (04/10/18 11:22 PM IDT) Shirish Chinchalkar (05/10/18 02:31 AM IDT) Kang Jin Cho (06/10/18 11:39 AM IDT) Mark Mammel & Jean-Charles Meyrignac (07/10/18 03:26 PM IDT) mtve (07/10/18 07:23 PM IDT) Serge Batalov (09/10/18 05:26 PM IDT) Markus Sigg (10/10/18 09:27 AM IDT) Alper Halbutogullari (11/10/18 02:46 PM IDT) Andreas Stiller (12/10/18 11:53 AM IDT) Arthur Vause (13/10/18 10:27 AM IDT) Pål Hermunn Johansen (15/10/18 10:26 AM IDT) Benjamin Buhrow (15/10/18 03:35 PM IDT) Arthur Vause (16/10/18 10:38 AM IDT) Florian Fischer (16/10/18 11:19 PM IDT) *Hermann Jurksch (19/10/18 07:08 PM IDT) Michael Liepelt (21/10/18 07:57 AM IDT) Hugo Pfoertner (22/10/18 07:11 AM IDT) Daniel Bitin (22/10/18 09:05 AM IDT) Paul Shaw (24/10/18 07:39 AM IDT) Andrea Andenna (24/10/18 09:49 PM IDT) Mykola Zubach (26/10/18 01:05 PM IDT) Mingliang Zeng (29/10/18 05:51 AM IDT) Tyler Mullen (30/10/18 09:07 PM IDT) David Greer (01/11/18 03:14 AM IDT) Li Li (01/11/18 04:45 AM IDT)