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Codeforces is a Russian website dedicated to competitive programming. It was created and is maintained by a group of competitive programmers from Saratov State University led by Mikhail Mirzayanov. Since 2013, Codeforces has surpassed Topcoder in term of active contestants ()(). Codeforces Round #Pi (Div. 2) contest broke all records in term of registrants: 6278. == Overview == Codeforces provides to all users following main services: * participation in the short (2-hours) contests, so-called "Codeforces Rounds", held about once a week; * challenge/hack other contestants solutions; * ability to solve problems from previous contests for training purposes; * "polygon" for creating and testing problems; * kind of social-networking by using of internal public blogs. Contestants are rated by system similar to ELO. There are usually no prizes for winners, though 100 winners of 100-th Codeforces Round received a T-Shirt. Some bigger contests (mostly country internal) are hosted on Codeforces base, among them "Yandex Algorithm 2011", provided by Yandex - one of biggest Russian IT-companies. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Codeforces」の詳細全文を読む スポンサード リンク
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