CEOI 2024
![](http://ceoi.inf.elte.hu/wp-content/uploads/2011/07/ceoi2024-300x111.png)
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- Location: Brno, Czechia,
23 – 29 June, 2023
- Participants: Austria,Croatia,Czech Republic, Germany, Hungary, Italy, Poland, Romania,Slovakia, Slovenia, Switzerland, Ukraine
- Website: https://ceoi2024.fi.muni.cz/
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CEOI 2023
![](http://ceoi.inf.elte.hu/wp-content/uploads/2011/07/ceoi2023-300x177.png)
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- Location: Magdeburg, Germany,
13 – 19 August, 2023
- Participants: Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia, Israel, Saxony-Anhalt (second host team), Switzerland, Ukraine
- Website:https://www.ceoi2023.de/
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CEOI 2022
![](http://ceoi.inf.elte.hu/wp-content/uploads/2020/09/ceoi2022-300x104.png)
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- Location: Varazdin, Croatia,
24 – 30 July, 2022
- Participants: Austria,Croatia,Czech Republic, Germany, Hungary, Italy, Poland, Romania,Slovakia, Slovenia, Switzerland, Ukraine
- Website: https://hsin.hr/ceoi/
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CEOI 2021
![](http://ceoi.inf.elte.hu/wp-content/uploads/2011/07/ceoi2021-300x96.png)
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- Location: Zagreb, Croatia,
1 – 5 September, 2021
- Participants: Austria,Croatia,Czech Republic, Germany, Hungary, Italy, Poland, Romania,Slovakia, Slovenia, Switzerland
- Website: https://hsin.hr/ceoi/
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CEOI 2020
![](http://ceoi.inf.elte.hu/wp-content/uploads/2011/07/ceoilogo_szoveggel_lila-e1598982153249-300x267.png)
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- Location: Nagykanizsa, Hungary,
23 – 29 August, 2020
- Participants: Austria,Croatia,Czech Republic, Germany, Hungary, Italy, Lithuania, Poland, Romania,
Slovakia, Slovenia, Switzerland, The Netherlands
- Website: http://ceoi2020.inf.elte.hu/
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CEOI 2019
![](http://ceoi.inf.elte.hu/wp-content/uploads/2011/07/ceoi2019.png)
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- Location: Bratislava, Slovakia,
July 23 – July 29, 2019
- Participants: Armenia, Austria, Croatia,Czech Republic,Germany, Hungary, Italy, Poland ,Romania,
Slovakia, Slovenia, Switzerland, Ukraine
- Website: http://oi.sk/ceoi2019/
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CEOI 2018
![](http://ceoi.inf.elte.hu/wp-content/uploads/2011/07/CEOI-2018-logo.png)
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- Location: Warsaw, Poland,
12 – 18 August 2018
- Participants: Austria, Azerbaijan, Croatia, Czech Republic, Georgia, Germany, Hungary, Italy, Poland, Romania,
Slovakia, Slovenia, Switzerland
- Website: https://ceoi2018.pl
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CEOI 2017
![ceoi2017-zmaj](http://ceoi.inf.elte.hu/wp-content/uploads/2011/07/ceoi2017-zmaj-300x264.png)
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- Location: Ljubljana, Slovenia,
10 – 15 July 2017
- Participants: Austria, Azerbaijan, Croatia, Czech Republic, Georgia, Germany, Hungary, Israel, Italy, Poland, Romania,
Slovakia, Switzerland, Slovenia
- Website: https://ceoi2017.acm.si
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CEOI 2016
![CEOI 2016 logo](http://ceoi.inf.elte.hu/wp-content/uploads/2011/07/ceoi2016-300x89.png)
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- Location: Piatra Neamț, Romania,
18 – 23 July 2016
- Participants: Bulgaria, Croatia, Czech Republic, Georgia, Germany, Hungary, Moldova, Poland, Romania, Slovakia, Slovenia, Switzerland
- Website: http://www.ceoi2016.ro/
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CEOI 2015
![ceoi2015logo](http://ceoi.inf.elte.hu/wp-content/uploads/2011/07/ceoi2015logo-300x107.png)
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- Location: Brno, Czech Republic,
29 June – 4 July 2015
- Participants: Croatia, Czech Republic, Georgia, Germany, Hungary, Poland, Romania, Slovakia, Slovenia,Switzerland
- Website: http://ceoi2015.fi.muni.cz
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CEOI 2014
![ceoi2014](http://ceoi.inf.elte.hu/wp-content/uploads/2011/07/ceoi2014.png)
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- Location: Jena, Thuringia, Germany, 18-24 June 2014
- Participants: Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia,Switzerland
- Website: http://ceoi2014.informatik-olympiade.de
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CEOI 2013
![ceoi2013](http://ceoi.inf.elte.hu/wp-content/uploads/2011/07/ceoi2013.png)
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- Location: Primosten, Croatia, 13-19 October 2013
- Participants: Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia,Switzerland
- Website: http://ceoi2013.hsin.hr/
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CEOI 2012
![](http://ceoi.inf.elte.hu/wp-content/uploads/2011/07/ceoi2012logo.png)
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- Location: Tata, Hungary, 7-13 July 2012
- Participants: Bulgaria, Croatia, Czech Republic, Germany, Hungary, Israel, Poland, Romania, Slovakia, Slovenia,Switzerland, The Netherlands
- Website: http://ceoi2012.elte.hu/
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CEOI 2011
![](http://ceoi.inf.elte.hu/images/history/ceoi2011.png)
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- Location: Gdynia, Poland, 7-12 July 2011
- Participants: Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia,Switzerland
- Website: http://ceoi2011.mimuw.edu.pl/
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CEOI 2010
![](http://ceoi.inf.elte.hu/images/history/ceoi-logo.png)
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- Location: Košice, Slovakia, 12-19 July 2010
- Participants: Bulgaria, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Switzerland
- Website: http://ceoi2010.ics.upjs.sk/
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CEOI 2009
![](http://ceoi.inf.elte.hu/images/history/ceoi2009.png)
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- Location: Targu Mures, Romania, 8-14 July 2009
- Participants: Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Switzerland, USA, Serbia, Moldova
- Website: http://www.ceoi2009.ro
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CEOI 2008
![](http://ceoi.inf.elte.hu/images/history/ceoi2008.png)
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- Location: Dresden, Germany, 6-12 July 2008
- Participants: Croatia, Czech Republic, Germany, Hungary, Israel, Poland, Romania, Saxony, Slovakia
- Website: http://www.ceoi2008.de
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CEOI 2007
![](http://ceoi.inf.elte.hu/images/history/ceoi2007.png)
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- Location: Brno, Czech Republic, 1-7 July 2007
- Participants: Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Czech Republic II, Brno
- Website: http://www.fi.muni.cz/ceoi/
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CEOI 2006
![](http://ceoi.inf.elte.hu/images/history/ceoi2006.png)
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- Location: Vrsar, Croatia, 1-8 July 2006
- Participants: Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Croatia II, Croatia III
- Website: http://www.hsin.hr/ceoi2006/
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CEOI 2005
![](http://ceoi.inf.elte.hu/images/history/ceoi2005.png)
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- Location: Sárospatak, Hungary, 28 July – 5 August, 2005
- Participants: Bosnia and Herzegovina, Croatia, Czech Republic, Estonia, France, Germany, Hungary, Poland, Romania, Sárospatak, Slovakia, Spain, The Netherlands
- Website: http://ceoi.inf.elte.hu/ceoi2005/
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CEOI 2004
![](http://ceoi.inf.elte.hu/images/history/ceoi2004.png)
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- Location: Rzeszów, Poland, 13-17 July 2004
- Participants: Bosnia & Herzegovina, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia
- Website: http://www.oi.edu.pl/ceoi2004/
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CEOI 2003
![](http://ceoi.inf.elte.hu/images/history/ceoi2003.png)
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- Location: Münster, Germany, 5-12 July 2003
- Participants: Croatia, Poland, Czech Republic, Slovenia, Netherlands, USA, Hungary, Slovakia, Romania, Iran, Germany, Westphalia
- Website: http://www.ceoi2003.de/
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CEOI 2002
![](http://ceoi.inf.elte.hu/images/history/ceoi2002.png)
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- Location: Košice, Slovakia, 30 June – 6 July 2002
- Participants: Austria, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia, The Netherlands, Iran
- Website: http://web.ics.upjs.sk/ceoi/
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CEOI 2001
![](http://ceoi.inf.elte.hu/images/history/ceoi2001.png)
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- Location: Zalaegerszeg, Hungary, 10-17 August 2001
- Participants: Austria, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia, Estonia, Finland, Italy, The Netherlands
- Website: http://ceoi.inf.elte.hu/ceoi2001/
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CEOI 2000
![](http://ceoi.inf.elte.hu/images/history/ceoi2000.png)
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- Location: Cluj-Napoca, Romania, 24-31 August 2000
- Participants: Croatia, Czech Republic, Germany, Hungary, Moldova, Netherlands, Poland, Romania, Slovakia, Slovenia, USA
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CEOI 1999
![](http://ceoi.inf.elte.hu/images/history/ceoi1999.png)
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- Location: Brno, Czech Republic, 2-9 September 1999
- Participants: Bosnia-Herzegovina, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia, USA
- Website: http://www.fi.muni.cz/ceoi1999/
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CEOI 1998![](http://ceoi.inf.elte.hu/images/history/ceoi1998.png)
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- Location: Zadar, Croatia, 20-27 May 1998
- Participants: Bosnia-Herzegovina, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia
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CEOI 1997
![](http://ceoi.inf.elte.hu/images/history/ceoi1997.png)
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- Location: Nowy Sącz, Poland, 17-24 July 1997
- Participants: Belarus, Croatia, Estonia, Germany, Hungary, Latvia, Lithuania, Netherlands, Poland, Romania, Slovakia, Ukraine, USA, Yugoslavia
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CEOI 1996
![](http://ceoi.inf.elte.hu/images/history/ceoi1996.png)
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- Location: Bratislava, Slovak Republic, 9-13 October 1996
- Participants: Croatia, Czech Republic, Hungary, Poland, Romania, Slovakia, Slovenia
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CEOI 1995
![](http://ceoi.inf.elte.hu/images/history/ceoi1995.png)
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- Location: Szeged, Hungary, 29 May – 3 June 1995
- Participants: Belarus, Croatia, Czech Republic, Estonia, Hungary, Lithuania, Poland, Romania, Slovakia, Ukraine, Yugoslavia
- Website: http://ceoi.inf.elte.hu/95/
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CEOI 1994
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- Location: Cluj-Napoca, Romania, 27-31 May 1994
- Participants: Croatia, Czech Republic, Hungary, Moldova, Poland, Romania, Turkey, Yugoslavia
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