About EJOI
The European Junior Olympiad in Informatics (EJOI) is an annual international programming competition for secondary school students from European countries. It follows the rules and standards of the International Olympiad in Informatics (IOI) and serves as a stepping stone for young talent towards the IOI.
The competition brings together some of the most promising young programmers from across Europe, giving them an opportunity to test their algorithmic problem-solving skills, exchange ideas, and connect with peers who share their passion for informatics and computer science.
Each participating country sends a delegation of up to four contestants, accompanied by a team leader. The contest spans two competition days, each featuring three algorithmic tasks to be solved in four hours.
History
EJOI 2026 marks the 10th anniversary of the competition. Since its inaugural edition in Sofia in 2017, EJOI has visited nine European countries and grown into a flagship event for junior informatics talent across the continent.
| Year | Host city | Country |
|---|---|---|
| 2017 | Sofia |  Bulgaria |
| 2018 | Innopolis |  Russia |
| 2019 | Maribor |  Slovenia |
| 2020 | Online |  Georgia |
| 2021 | Online |  Romania |
| 2022 | Online |  Ukraine |
| 2023 | Kutaisi | Georgia |
| 2024 | Chișinău |  Moldova |
| 2025 | Shumen | Bulgaria |
| 2026 | Kaunas |  Lithuania |
EJOI 2026
EJOI 2026 will take place in Kaunas, Lithuania, from 24–30 July 2026. The event is jointly organised by Ukraine and Lithuania — by the Ukrainian Federation of Olympiad Programming, the Faculty of Mathematics and Informatics of Vilnius University, the Faculty of Informatics of Kaunas University of Technology, and the Lithuanian Computer Society.
EJOI 2026 is organized by
The Ukrainian Federation of Olympiad Programming
The Faculty of Mathematics and Informatics,
Vilnius University
The Faculty of Informatics,
Kaunas University of Technology
The Lithuanian Computer Society
Supported by
