MathDB
ok combi

Source: 2021 Thailand October Camp 4.1

May 6, 2023
combinatorics

Problem Statement

Let n3n\geq 3 be an integer. Each vertex of a regular nn-gon is labelled with a real number not exceeding 11. For real numbers a,b,ca,b,c on any three consecutive vertices which are arranged clockwise in such an order, we have c=abc=|a-b|. Determine the maximum value of the sum of all numbers in terms of nn.