IOI Syllabus

Current Syllabus version (2025)

All available Syllabus versions:

• draft 2025 version (with highlighted changes since the previous official version)
• official 2024 version (also used in 2023)
• draft 2023 version (with highlighted changes since the previous official version)
• draft 2021 version (cosmetic changes only, wasn't made official, changes were propagated to the next draft)
• official 2018 version with highlighted changes (also used in 2019-2022)
• official 2017 version
• official 2015 version (also used in 2016)
• a note about IOI 2015 tasks
• changelog between the 2013 and 2015 versions
• official 2013 version (also used in 2014)
• changelog between the 2009 and 2013 versions
• official 2009 version (also used in 2010, 2011, and 2012)

Current status of the Syllabus

The Syllabus is now an official document related to the International Olympiad in Informatics (IOI). For each IOI, an up-to-date version of the Syllabus is produced by the ISC, as described in the IOI Regulations, Statue 3.13.

During the task selection process, the ISC reviews the Syllabus conformance of all proposals. (However, note that the Syllabus is not a binding set of rules. If sufficient rationale is present, the ISC may decide to accept a task that does not fully conform to the Syllabus.)

Authors

The following people have authored the original version of the syllabus:

• Tom Verhoeff (Technische Universiteit Eindhoven, The Netherlands, t.verhoeff at tue.nl)
• Gyula Horváth (University of Szeged, Hungary, horvath at inf.u-szeged.hu)
• Krzysztof Diks (Warsaw University, Poland, diks at mimuw.edu.pl)
• Gordon Cormack (University of Waterloo, Canada, gvcormac@uwaterloo.ca)

Since then, the following people have maintained the syllabus and made significant contributions:

• Michal Forišek (Comenius University, Slovakia, misof at algo.sk) [current maintainer]
• Richard Peng (Georgia Tech, USA, richard.peng at gmail.com)
• Jakub Łącki (Warsaw University, Poland, j.lacki@mimuw.edu.pl)

The content of the Syllabus has been influenced by past and present ISC members and several other active members of the IOI community.

You are welcome to send any feedback on the Syllabus to the current maintainer's e-mail address.