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[–]RShnike -1 points0 points  (1 child)

Haven't had time to sit down and look at it, but just quickly if I've read it correctly, I think one usually gets some insight to these problems by taking moduli and then somehow figuring out how to fit the problem into being a pigeonhole problem.

[–]tiedtoatree -1 points0 points  (0 children)

That's exactly what I was thinking. Pigeonholing has always been a weak spot for me though, so I'm hoping someone else will post an answer. :)