Code Abbey
Solve programming problems in any language and submit your answer
Code Abbey is a collection of short programming problems. Each task shows a problem and some input data. You write a program in any language, run it on that input, then enter both the answer and your source code on the site. Correct answers earn points.
Free · Browser · Beginner
About Code Abbey
The site is built for people who are learning to program. A user ranking adds friendly competition, and you can earn a free programming certificate. Some universities use it with their students. The problem list now runs past number 500.
You register with a username and password, or sign in with GitHub or Google. Rodion Gorkovenko created it with help from the community, and the site's code is open source.
On Breakpoint since 23 Oct 2026.