| 출처 | 장소 | 하위 출처 | 채점 가능한 문제 | 총 문제 |
|---|---|---|---|---|
| CEOI 2025 | Cluj-Napoca, Romania | 2 | 6 | 6 |
| CEOI 2024 | Brno, Czech | 3 | 8 | 8 |
| CEOI 2023 | Magdeburg, Germany | 2 | 6 | 6 |
| CEOI 2022 | Varaždin, Croatia | 2 | 3 | 6 |
| CEOI 2021 | Zagreb, Croatia | 2 | 6 | 6 |
| CEOI 2020 | Nagyakanizsa, Hungary | 2 | 6 | 6 |
| CEOI 2019 | Bratislava, Slovakia | 3 | 9 | 9 |
| CEOI 2018 | Warsaw, Poland | 2 | 6 | 6 |
| CEOI 2017 | ljubljana, Slovenia | 3 | 8 | 9 |
| CEOI 2016 | Piatra-Neamț, Romania | 2 | 12 | 12 |
| CEOI 2015 | Brno, Czech Republic | 3 | 16 | 16 |
| CEOI 2014 | Jena, Germany | 2 | 5 | 6 |
| CEOI 2013 | Primošten, Croatia | 2 | 15 | 15 |
| CEOI 2012 | Tata, Hungary | 2 | 3 | 6 |
| CEOI 2011 | Gdynia, Poland | 3 | 7 | 7 |
| CEOI 2010 | Košice, Slovakia | 2 | 6 | 6 |
| CEOI 2009 | Târgu Mureş, Romania | 2 | 5 | 6 |
| CEOI 2008 | Dresden, Germany | 2 | 5 | 6 |
| CEOI 2007 | Brno, Czech Republic | 2 | 14 | 15 |
| CEOI 2006 | Vrsar, Croatia | 2 | 6 | 6 |
| CEOI 2005 | Sárospatak, Hungary | 2 | 4 | 6 |
| CEOI 2004 | Rzeszów, Poland | 3 | 7 | 7 |
| CEOI 2003 | Münster, Germany | 2 | 4 | 6 |
| CEOI 2002 | Košice, Slovakia | 2 | 5 | 6 |
| CEOI 2001 | Zalaegerszeg, Hungary | 2 | 1 | 5 |
| CEOI 2000 | Cluj-Napoca, Romania | 2 | 0 | 0 |
| CEOI 1999 | Brno, Czech Republic | 2 | 2 | 6 |
| CEOI 1998 | Zadar, Croatia | 2 | 3 | 6 |
| CEOI 1997 | Nowy Sącz, Poland | 2 | 0 | 6 |