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Revision history of "1989 APMO Problems/Problem 4"

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  • (cur | prev) 20:56, 11 July 2021‎ Satisfiedmagma (talk | contribs)‎ . . (402 bytes) (+402)‎ . . (Created page with "==Problem== Let <math>S</math> be a set consisting of <math>m</math> pairs <math>(a,b)</math> of positive integers with the property that <math>1 \leq a < b \leq n</math>. Sh...")
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