SPOJ (Sphere Online Judge) is an online judge system with over 315,000 registered users and over 20000 problems. The solution to problems can be submitted in over 60 languages including C, C++, Java, Python, C#, Go, Haskell, Ocaml, and F#. SPOJ has a rapidly growing problem set/tasks available for practice 24 hours/day, including many original tasks prepared by the community of expert problem setters associated with the project.
Need an alternative to Spoj? Read on. We've looked at the best Spoj alternatives available for Windows, Mac and Android.
CodinGame is a challenge-based training platform for programmers where you can play with the hottest programming topics.
Engaging social network tasking developers with real world coding challenges and connecting them with great companies.
Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve.
Coderbyte is a place built for anyone to practice and perfect their programming skills. Challenges are added almost every day so you can work on applying your...
Achieve code mastery through challenge. Improve your skills by training with others on real code challenges Kata In our dojo, kata are real code challenges...
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CodeSignal is the leading provider of assessments for technical hires. As the creator of the Predictive Coding Score, a measure of a candidates coding skills, CodeSignal...
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Practice and level up your development skills and prepare for technical interviews.
Develop your coding skills and practice them by competing with hundreds of players worldwide. Code your own bots in your preferred language and join the various...
CodeChef is a not-for-profit educational initiative by Directi, an Indian software company. It is a global programming community that fosters learning and friendly...
Topcoder provides members opportunities to demonstrate their expertise, improve their skills, and win cash, while helping real world organizations solve real world...
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