Let S be a set of three integers. For a nonempty subset A of S, let A be the sum of the
Chapter 5, Problem 5.47(choose chapter or problem)
Let S be a set of three integers. For a nonempty subset A of S, let A be the sum of the elements in A. Provethat there exist two distinct nonempty subsets B and C of S such that B C (mod 6).
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