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Discussion of Problem 1486. Equal Squares

give me the ideas of solution please
Posted by Ilya Filippov (Petrozavodsk SU) 12 Jul 2009 05:09
Re: give me the ideas of solution please
Posted by only_nicety 28 Nov 2010 08:30
if you are a chinese ,
you can read the article —— Hash在信息学竞赛中的一类应用