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Practice solving coding problems online in your browser in C++, Java, Python, and more!

Originally developed by Marty Stepp with assistance from Jessica Miller. As of 2016, development also includes the wonderful contributions of Alex Miller, Ryan Rowe, and Melissa Galloway.


version beta (2017/01/18)

Our site is free to use but contains advertisements to help cover our hosting and support costs. The site will deny you access if it detects an ad blocker. Please do not use ad blockers on our site.

(To submit a solution for a problem or to track your progress, you must create an account and log in.)

Is there a problem? Contact a site administrator.