

AtCoder
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AtCoder.jp is a Japanese online competitive programming platform that hosts algorithmic programming contests, practice problems, and virtual contests for programmers of all levels.
Cost / License
- Free
- Proprietary
Platforms
- Online


AtCoder
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AtCoder News & Activities
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Recent activities
zigger added AtCoder as alternative to Codeforces- zigger added AtCoder
AtCoder information
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What is AtCoder?
AtCoder.jp is a Japanese online competitive programming platform that hosts algorithmic programming contests, practice problems, and virtual contests for programmers of all levels.
- Main features: timed contests (regular and beginner-friendly), problem archives for practice, rated rankings, and user-submitted solutions.
- Audience: competitive programmers, students, and developers preparing for coding interviews.
- Contest formats: single-round contests, ABC/ARC/AGC-style events (AtCoder Beginner/Regular/Grand Contests), and practice/virtual contests to simulate past contests.
- Languages and tools: supports common languages (C++, Python, Java, etc.) and provides a judge that runs and scores submitted code.
- Community: leaderboards, user pages, and editorials for many contests.


