Internet online contest series
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.
The first contest will be held on Saturday, 19 October 2019, starting at 14:00 (GMT/UTC). You may use Python, Pascal, C/C++ or Java as your programming language of choice.
Instructions, problems and the contest system will be located at
This web page will be available for registration 48 hours before the contest.
You can find problems, test data and solutions from previous Croatian competitions in informatics in the COCI 2006/2007 Archive, COCI 2007/2008 Archive, COCI 2008/2009 Archive, COCI 2009/2010 Archive, COCI 2010/2011 Archive, COCI 2011/2012 Archive, COCI 2012/2013 Archive, COCI 2013/2014 Archive, COCI 2014/2015 Archive, COCI 2015/2016 Archive, COCI 2016/2017 Archive, COCI 2017/2018 Archive, COCI 2018/2019 Archive and here.
Feel free to e-mail us at for any and all additional information.
Scientific Committee
Ivan Paljak and Marin Kišić, chairmen
Fabijan Bošnjak
Nikola Dmitrović
Karlo Franić
Gabrijel Jambrošić
Josip Klepec
Daniel Paleka
Stjepan Požgaj
Tonko Sabolčec
Paula Vidas
Evaluation and Technical Committee
Matej Ferenčević
Project Manager
Krešimir Malnar