程序员刷题

Powerful coding training system. LintCode has the most interview problems covering Google, Facebook, Linkedin, Amazon, Microsoft and so on. We provide Chinese and English versions for coders around the world.

A coding practice website for all programming levels – Join a community of over 3 million developers and improve your coding skills in over 55 programming languages!

海量技术面试题库，拥有算法、数据结构、系统设计等 1000+题目，帮助你高效提升编程技能，轻松拿下世界 IT 名企 Dream Offer。

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Virtual Judge

CodeChef - Learn and Practice Coding with Problems

A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions.

hihoCoder

CodeHS - Teach Coding and Computer Science at Your School | CodeHS

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UOJ - Universal Online Judge