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Discussion of Problem 1638. Bookworm

Aydar hint [2] // Problem 1638. Bookworm 15 Aug 2011 15:03
Aydar Re: hint [1] // Problem 1638. Bookworm 15 Aug 2011 15:04
i cant understand! help me
daftcoder [Yaroslavl SU] Re: hint // Problem 1638. Bookworm 15 Aug 2011 20:00
Don't create new topics, just watch the problem's discussion.