Just finished

IOI 2019 took place in Azerbaijan, from August 4-11, 2019. More info is available on the official website.

Just finished   IOI 2019 in Azerbaijan

COCI 2019/2020

Over the next six months we will organize seven online contests as a warm-up for the 2020 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:
http://hsin.hr/coci/ - information about the contest
http://evaluator.hsin.hr/ - contest system

We hope that you will join us or encourage your students to do so!

This is the fourteenth 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 http://hsin.hr/coci/. There are over 600 original tasks for students to practice on! 

With regards,
Kresimir Malnar
Croatian Computer Science Association

Need more info?


Not sure where to go? Click here to view some basic information on how to learn programming and prepare to win a medal at the IOI.


A couple of volunteers maintain a separate page with stats about people who participated at the International Olympiad in Informatics.


The IOI publishes a journal every year, with original high-quality scientific papers related to education, contests and algorithms.