2017 USAMO Problems/Problem 2
Revision as of 21:08, 27 November 2017 by NeoMathematicalKid (talk | contribs) (Reinstate the problem text)
Problem
Let 
be a collection of 
positive integers, not necessarily distinct. For any sequence of integers 
and any permutation 
of , define an 
of 
to be a pair of entries 
with 
for which one of the following condition holds:
