Croatian Open Competition in Informatics COCI 2014/2015 Internet online contest series

As part of the COCI series, we are hosting an Internet online contest
with problems from the Croatian Olympiad in Informatics 2015.
The contest is primarily intended for high school contestants,
but is open to all interested!

This contest is used in Croatia to select members of the IOI team.
There will be 3-5 tasks and the contest will be 5 hours long.
It will be held on Saturday, March 28, starting at 14:00 (GMT/UTC).
Check out your local times at
You may use Python, Pascal, C, C++ or Java as your programming language of choice.

The two relevant websites are: - information about the contest - contest system
We hope that you will join us or encourage your students to do so!

This is the ninth year in a row that we are hosting the COCI series. You
can find tasks (statements, test data and solutions) from the previous
eight years at That is over 350 original tasks for
students to practice on!