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back to boardfoe those who ask which data xstructure u need to solve it Posted by  Arseniy 25 Feb 2014 01:51 You need set. Think how to use it here Re: foe those who ask which data xstructure u need to solve it Posted by  Otrebus 29 Jan 2015 20:01 No, you don't need a set. Any simple linear data structure will do.  |  
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