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Jun 8, 2018 at 11:39 vote accept CommunityBot
Jun 3, 2018 at 13:41 comment added Geoff Robinson @MaxAlekseyev : I did wonder whether this was some contest problem, and wondered whether to write an answer or not, for that reason. It did not occur to me it might be a Monthly Problem (these are harder to see these days, since the Monthly ( of recent years) doesn't seem to be freely available online).
Jun 3, 2018 at 13:12 comment added Max Alekseyev Congratulations on solving AMM problem 12043.
Jun 3, 2018 at 12:18 history answered Geoff Robinson CC BY-SA 4.0