Can't do div2 C any advices

Revision en1, by Dannor, 2017-12-22 22:37:12

I generally do first 2 questions Div2 A and B but I can't do C or more what should I do ? Do you have any advices?

Tags #help, #advice

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en1 English Dannor 2017-12-22 22:37:12 141 Initial revision (published)