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Discussion of Problem 1638. Bookworm

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