how to improve

Revision en1, by abdayyad2012, 2015-11-26 20:33:08

Hello Codeforces people :D

is there an references , books, youtube .... etc to improve myself and be great problem problem solver ??

and thanks ^_^

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en1 English abdayyad2012 2015-11-26 20:33:08 171 Initial revision (published)