TOT 1999 Autumn AS1 numbers 1 to n inclusive on a circle
Source:
May 11, 2020
combinatoricsdivisibledividesSum
Problem Statement
For what values o f is it possible to place the integers from to inclusive on a circle (not necessarily in order) so that the sum of any two successive integers in the circle is divisible by the next one in the clockwise order? (A Shapovalov)