Iran combinatorial number thoery
Source: Iranian TST 2019, third exam day 1, problem 2
April 25, 2019
Combinatorial Number Theorynumber theorycombinatorics
Problem Statement
Hesam chose distinct positive integers and he gave all pairwise 's and pairwise 's (a total of numbers) to Masoud. Can Masoud always find the first numbers, just by knowing these numbers?Proposed by Morteza Saghafian