CodeAbbey - programming problems

We believe that three things lead to success:
Practice, Practice and Practice!

Login (register) with Username and Password

or else

Login with GitHub

Login with Google

Everyone can win Free Programming Certificate here
How this works, what is inside? Watch author's demo!

Latest problems
Lucky Number Scores #491
Circuit Board Connections #490
TV Charity Fundraiser #489
Accurate Curve Fitting #488
Reduce and Equalise #487
Two Colour Special Nim #486
Magic 3 #485

- we proudly collect logos of the Universities which actively use CodeAbbey

Login (register) with Username and Password

or else

Login with GitHub

Login with Google

Top Brethren and Sistren of the Week

(see best of all times)

User	Rank	Solved

Recent at Forums:

Fastest Clearance - A Proposed New Problem

from CSFPython, last CSFPython

last at Apr 28 2026 07:48

Are we supposed to be able to adjust input for problems?

from Mittens, last Mittens

last at Apr 15 2026 17:48

Problem 30 is currently impossible in brainfuck

from KingSweat, last KingSweat

last at Apr 14 2026 11:01

Lucky Number Scores - A Proposed New Problem

from CSFPython, last Rodion (admin)

last at Apr 14 2026 08:03

The input data for Problem 368 contains an error

from kajuyone, last kajuyone

last at Apr 9 2026 02:13