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Learning to code?
Preparing for an interview?

Or just want to have fun with challenging problems?


Hone your skills and prepare for interviews with practical and challenging problems.
Learn how to optimize and write efficient code and algorithms.


Complete challenges and rank up.
Decorate your profile with badges and trophies.
Land a job at your dream company.


Compete with programmers of a large and growing community in contests.


Learn and discuss solutions and best practices with fellow programmers.

Code in your favorite language

We currently support 13 popular languages, and are still adding more.