IOI 2016 Logo

IOI 2015 Logo

News & Events

coci Croatian Open Competition in Informatics
COCI 2015/2016
Internet online contest series

November 13, 2015

The third contest will be held on Saturday, 28th November 2015, 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

You can find the tasks (statements, test data and solutions) from the previous nine years at There are almost 400 original tasks for students to practice on!

Acer becomes Official IT Infrastructure Sponsor for IOI
September 3, 2015

It is officially announced that Acer becomes Official IT Infrastructure Sponsor for International Olympiad in Informatics from 2017 till 2021. Detailed information in the news release.

Participants of IOI2015 published in the IOI Statistics
July 8, 2015

List of registered IOI2015 participants is published in the IOI statistics page.

Just as reminder: For several countries some information about some of the previous IOIs is missed. You can check color code of your country in the country list. Green denotes that information is complete, yellow - that only information about contestants is complete but incomplete about leaders and red - that even information about contestants seems to be incomplete.

You can add missing (or update existing) information by yourselves - the interface for adding or editing information is simple enough - just try it out! However, if you have missed information in any other appropriate form (text file, MS Word document, MS Excel spreadsheet, etc.), just send it to us (the best addressee would be Eduards Kalinicenko aka eduardische, and give some days for processing.

If you can fill any of the blanks in the whole IOI history picture, please, do it! At the moment it is known that information about IOI's from 1990, 1993, 1997, 1998 and 2002 is incomplete. We would be glad if the responsible people for their countries will at least provide full information for their own country. It's only 27 years, so it's possible, but the further away we go, the harder it'll be to collect, so let's do it once and for all. In case if you have any questions or problems, do not hesitate to ask Eduards or Mārtiņš Opmanis (, you can also meet me in present at IOI 2015.).

IOI Conference
June 30, 2015

Traditional IOI Conference will be held during IOI2015. See conference agenda.

IOI Journal
June 30, 2015

The ninth volume of the journal "Olympiads in Informatics" is published.

June 1, 2015

This season's fourth newsletter is published.

IOI2015 Rules
June 1, 2015

IOI2015 Competition Rules are published at IOI2015 website. Updated (June 19)!

April 10, 2015

This season's third newsletter is published.

IOI Surveys
January 13, 2015

Many participants of the IOI2013 and IOI2014 provided feedback through the online surveys.
Now you can find the survey results for IOI2013 and IOI2014.
There were additional questions, e.g. how to improve the IOI. The feedbacks to that questions were also studied, categorized and shared with the IC, ISC, the past and future host organizing and scientific committees.

IOI Workshop
January 3, 2015

This season's second newsletter is published. Contains important information about IOI Workshop.

December 22, 2014

The 9th IOI conference will be held concurrently with the 27th International Olympiad in Informatics, taking place in Almaty, July 26th - August 2nd, 2015. The conference focus is in research problems of the national and international informatics contests, and offers an opportunity to bring together the accumulated knowledge and experiences from a number of events on teaching algorithms and programming.

Please submit your proposals (title and abstract) for papers before the end of January 2015 to prof. Valentina Dagiene ( The full papers are to be submitted by 31st of March 2015.

Like in the previous conferences, papers will be divided into two main groups: research papers(8-15 pages) and country reports(4-8 pages).

Any additional information for the IOI community would be appreciated as well: like review of books, short presentation of national tasks, training curricula, etc.

Papers from the previous IOI conferences can be found on IOI website:

Accepted papers will be published in OLYMPIADS IN INFORMATICS journal. The journal is abstracted / indexed by CEEOL, EBSCO, and Scopus.

November 5, 2014

This season's first newsletter is published.

Michael & Ophelia Lazaridis Olympiad Scholarship
October 27, 2014

University of Waterloo in Canada offer scholarship to IOI and IMO medal winners starting university in the fall of 2015. (Full text of e-mail)

IOI2014 - Statistics
July 19. 2014

Statistics about IOI2014 now are available at IOI Statistics.

Volume 8 of the "Olympiads in Informatics"
July 8, 2014

Volume 8 of the IOI journal "Olympiads in Informatics" is now available.