Croatian Open Competition in Informatics

Croatian Open Competition in Informatics
COCI 2018/2019
Internet online contest series

The second contest in the series will be held on this Saturday, November 17, starting at 14:00 (GMT/UTC).
Check out your local times at

Over the next six months we will organize seven online contests
as a warm-up for the 2019 season of high school programming competitions.
Everyone is welcome to participate!

Each contest will be three hours long and will feature five tasks.
The tasks will be of widely varying difficulty; we hope that many
beginner or up-and-coming contestants will participate, as well as
the more experienced ones.

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 thirteenth year in a row that we are hosting the COCI series. You
can find the tasks (statements, test data and solutions) from the previous
years at There are over 500 original tasks for
students to practice on!

Project Manager
Kresimir Malnar
Croatian Computer Science Association