Top 1 Apps Similar to Codeforces Companion

Codeforces is a Russian websitededicatedtocompetitive programming.It was created and is maintainedby agroupof competitive programmers from Saratov State UniversityledbyMikhail Mirzayanov.Codeforces provides the following main services to allusers:participation in the short (2-hours)contests,so-called"Codeforces Rounds", held about once aweek;participation in educational contests (1.5-2.5 hours), held2-4timesper monthchallenge/hack other contestants solutions;ability to solve problems from previous contestsfortrainingpurposes;"polygon" for creating and testing problems;kind of social-networking through the use ofinternalpublicblogs.