Random Info, Dec 15, 2021
I'm in the process of moving codah.club to a new (silent) server, so you should expect some downtime. I want to say that I'm grateful for the hardware given to me, that ran codah.club for a long time (5+ years).
Call for coders, Feb 13, 2021
If you're interested in helping bring z-trening/codah.club to the next level, please contact me at... (figure out how to do it :P).
Recent Updates, Feb 12, 2021
A backup/recovery system was setup. Z-trening/codah will not be down for more than a few hours at a time :)
Recent Updates, Jan 8-th 2021

Recent Updates

Z will work on z-trening for a few hours a week. The goal is to refactor and open-source as much of the infrastructure as possible, while at the same time providing new features that make it easier to practice IOI and ACM problems.
Updates, Nov 14-th 2017


There is no plan to update the website at this point. The system will stay online for at least a few years, and will be used for private contests. Additional 100ish ACM level problems will be added over the course of few months
Welcome (original welcome box, credits to vica)

About Z-Trening

Z-Trening is an online resource of challenging programming exercises (mostly compiled from previous international computer science competitions) that serves the purpose of training its users for future contests.

Each problem is accompanied by a series of tests that can be used to assess the correctness of a given solution. Users are free to submit their solutions in Pascal, C, or C++ and are graded based on the number of tests passed. Each user is associated with a history of his/her results and awarded medals.

Z-Trening also hosts online programming competitions, which are few hours long and include several new problems.

For additional information please read the short Tutorial and the FAQ or visit the website Forum.

Basically you know that Z-Trening rocks, hehe.
Recently active Codahs
Mihajllo    omarzekic    elvircrn   
dario-dsa    Miminyte    kisic14   
A.Armin    ColeTurner    goranm   
DZoki019    stjepanp    dfistric   
The_Philosopher    jovan_b    admin   
renovator    Vito1036   
Total Tasks on Z-Trening

I do remember promising a new (refactored) z-trening after the task count reaches 1K... little did I know that the servers will die just in time :P
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