100 points in a circle, green or yellow, every 5 color changes
Source: Greece JBMO TST 1999
May 25, 2019
combinatoricsColoringnumber theory
Problem Statement
A circle is divided in equal parts and the points of this division are colored green or yellow, such that when between two points of division there are exactly division points and the point is green, then the point shall be yellow. Which points are more, the green or the yellow ones?