A list of excellent resources for most of the topics covered in Competitive Programming.
- Introduction: GeeksForGeeks
- Introduction: TopCoder - 1, TopCoder - 2, GeeksForGeeks
- Intoduction: TopCoder, GeeksForGeeks
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http://www.cnblogs.com/ccz181078 - Chinese blog consisting extremely good problems and their editorials
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http://e-maxx.ru/ - Good reading material for advanced topics
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http://e-maxx-eng.appspot.com/ - English translation of e-maxx.ru.
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Petr Mitrichev - Lots of good round and how to think at feet!
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Algorithms Live! - Editorials on different topics and problems every week!
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MIT OpenCourseWare - Courses on programming and many more