The incenter of a triangle is the intersection of the triangle's angle bisectors. This is somewhat complicated, but the coordinate formula for incenter is pretty simple (reference). The specifics of the formula do not matter much for this challenge. The formula requires lengths of sides, so it ca...

Task Write a program/function that when given a positive integer \$n\$ splits the numbers from \$1\$ to \$n\$ into two sets, so that no integers \$a, b, c\$, satisfying \$a^2 + b^2 = c^2\$ are all in the same set. For example, if \$3\$ and \$4\$ are in the first set, then \$5\$ must be in the sec...

In the description of this challenge, the following board will be used as a reference for positions: ABC DEF GHI For instance, in a game of ordinary tic-tac-toe, B E A C G D F H I describes the following: -X- -X- XX- XXO XXO XXO XXO XXO XXO --- -O- -O- -O- -O- OO- OOX...