Alternatives to Spoj for all platforms with any license

Platforms

Web / Online

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    Project Euler

    Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical...

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    Coderbyte

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    CodeFights

    Duel with friends and foes in head-to-head programming battles!

    Free Personal Self-Hosted

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    hackerrank.com

    A fun social platform for hackers to solve interesting puzzles, build quick hacks, code game bots and collaborate to solve real-world...

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    Codechef

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    CodinGame

    CodinGame is a challenge-based training platform for programmers where you can play with the hottest programming topics.

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    Codewars

    Achieve code mastery through challenge. Improve your skills by training with others on real code challenges Kata In our dojo...

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    The AI Games

    Develop your coding skills and practice them by competing with hundreds of players worldwide. Code your own bots in your preferred...

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    Topcoder

    Topcoder provides members opportunities to demonstrate their expertise, improve their skills, and win cash, while helping real world...

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    Code Arcade

    Built by CodeFights , Code Arcade challenges players to solve programming tasks to complete game levels. It's a fun way to hone...

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