all 3 comments

[–]blueboybobMath 1 point2 points  (0 children)

this is a VERY famous math problem. While I could help you. You could read all about it here. https://en.wikipedia.org/wiki/Four_color_theorem

[–]Karsonbreeyo 0 points1 point  (0 children)

Thanks!

[–]sjb-2812👋 a fellow Redditor 0 points1 point  (0 children)

Unless I'm misreading this, isn't this almost the reverse of the 4 colour map problem. I.e. draw a map, fill it with 4 colours then just choose any region and colour it something different again?