描述

Codeforces is a Russian website dedicatedtocompetitive programming.It was created and is maintained by agroupof competitive programmers from Saratov State University ledbyMikhail Mirzayanov.

Codeforces provides the following main services to allusers:

participation in the short (2-hours) contests,so-called"Codeforces Rounds", held about once a week;
participation in educational contests (1.5-2.5 hours), held2-4times per month
challenge/hack other contestants solutions;
ability to solve problems from previous contests fortrainingpurposes;
"polygon" for creating and testing problems;
kind of social-networking through the use of internalpublicblogs.