MathDB
complete integral values

Source: Netherlands TST for BxMO 2017 problem 1

February 1, 2018
combinatoricsnumber theory

Problem Statement

Let nn be an even positive integer. A sequence of nn real numbers is called complete if for every integer mm with 1mn1 \leq m \leq n either the sum of the first mm terms of the sum or the sum of the last mm terms is integral. Determine the minimum number of integers in a complete sequence of nn numbers.