2021 IMO Problems/Problem 6
Revision as of 00:02, 31 July 2021 by Renrenthehamster (talk | contribs) (Created page with "==Problem== Let <math>m>2</math> be an integer, <math>A</math> be a finite set of (not necessarily positive) integers, and <math>B_1,B_2,B_3,...,B_m</math> be subsets of <math...")
Let be an integer, be a finite set of (not necessarily positive) integers, and be subsets of . Assume that for each the sum of the elements of is . Prove that contains at least elements.
https://www.youtube.com/watch?v=vUftJHRaNx8 [Video contains solutions to all day 2 problems]