2018 OIM Problems/Problem 4
Problem
A set "X" of positive integers is "Iberian" if is a subset of , and when and are elements of , then the also belongs to . And Iberian set is "Olympic" if it is not contained in another Iberian set. Find all Iberian Olympic sets that contain the number 33.
~translated into English by Tomas Diaz. ~orders@tomasdiaz.com
Solution
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