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Discussion of Problem 1870. Zinium 2

SubjectAuthorProblemUpdatedAnswers
mathematical proof of the solution SPOILERS!!!lallala1870. Zinium 217 Feb 2016 18:130  
WA 6 ?????Михаил1870. Zinium 215 Jan 2012 04:253  
Even numbersVitaliy Karelin1870. Zinium 220 Oct 2011 19:451  

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