The Central European Olympiad in Informatics (CEOI) is an annual

informatics Informatics is the study of computational systems, especially those for data storage and retrieval. According to ACM ''Europe and'' ''Informatics Europe'', informatics is synonymous with computer science and computing as a profession, in which ...

competition for secondary school students. Each of the participating central European countries (plus one or two guest countries, and a local team from the host area) sends a team of up to four contestants, a team leader and a deputy team leader. The contestants compete individually, i.e. a team score is not calculated. Competitors are selected through national

competitive programming Competitive programming is a mind sport usually held over the Internet or a local network, involving participants trying to program according to provided specifications. Contestants are referred to as ''sport programmers''. Competitive progra ...

contests. The contest consists of two days computer programming, solving problems of an

algorithm In mathematics and computer science, an algorithm () is a finite sequence of rigorous instructions, typically used to solve a class of specific Computational problem, problems or to perform a computation. Algorithms are used as specificat ...

ic nature. The structure of these competition days is described in the article about the

International Olympiad in Informatics The International Olympiad in Informatics (IOI) is an annual competitive programming and one of the International Science Olympiads for secondary school students. It is the second largest science olympiad, after International Mathematical Olympi ...

(IOI), which served as a role model for the more local CEOI. The first CEOI was held in 1994 in Romania (founder of the CEOI), five years after the first IOI.

List of CEOI websites and locations

CEOI 2021
was supposed to be held in

Zagreb Zagreb ( , , , ) is the capital (political), capital and List of cities and towns in Croatia#List of cities and towns, largest city of Croatia. It is in the Northern Croatia, northwest of the country, along the Sava river, at the southern slop ...

Croatia , image_flag = Flag of Croatia.svg , image_coat = Coat of arms of Croatia.svg , anthem = "Lijepa naša domovino"("Our Beautiful Homeland") , image_map = , map_caption = , capit ...

, was held online instead (1- 5 September 2021).
CEOI 2020
was held in

Nagykanizsa Nagykanizsa (; hr, Velika Kaniža/Velika Kanjiža, or just ''Kaniža/Kanjiža''; german: Großkirchen, Groß-Kanizsa; it, Canissa; sl, Velika Kaniža; tr, Kanije), known colloquially as Kanizsa, is a medium-sized city in Zala County in southw ...

Hungary Hungary ( hu, Magyarország ) is a landlocked country in Central Europe. Spanning of the Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia a ...

(23 - 29 August 2020).
CEOI 2019
was held in

Bratislava Bratislava (, also ; ; german: Preßburg/Pressburg ; hu, Pozsony) is the Capital city, capital and largest city of Slovakia. Officially, the population of the city is about 475,000; however, it is estimated to be more than 660,000 — approxim ...

Slovakia Slovakia (; sk, Slovensko ), officially the Slovak Republic ( sk, Slovenská republika, links=no ), is a landlocked country in Central Europe. It is bordered by Poland to the north, Ukraine to the east, Hungary to the south, Austria to the s ...

(23 - 29 July 2019).
CEOI 2018
was held in

Warsaw Warsaw ( pl, Warszawa, ), officially the Capital City of Warsaw,, abbreviation: ''m.st. Warszawa'' is the capital and largest city of Poland. The metropolis stands on the River Vistula in east-central Poland, and its population is officia ...

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populous ...

(12 - 18 August 2018).
CEOI 2017
was held in

Ljubljana Ljubljana (also known by other historical names) is the capital and largest city of Slovenia. It is the country's cultural, educational, economic, political and administrative center. During antiquity, a Roman city called Emona stood in the ar ...

, Slovenia (10 - 15 July 2017)
Results

CEOI 2016
was held in Piatra Neamț, Romania (18 - 23 July 2016). Participants: Bulgaria, Croatia, Czech Republic, Georgia, Germany, Hungary, Moldova, Poland, Romania, Slovakia, Slovenia, Switzerland.
CEOI 2015
was held in

Brno Brno ( , ; german: Brünn ) is a city in the South Moravian Region of the Czech Republic. Located at the confluence of the Svitava and Svratka rivers, Brno has about 380,000 inhabitants, making it the second-largest city in the Czech Republic ...

, Czech Republic (29 June - 4 July 2015). Participants: Croatia, Czech Republic, Georgia, Germany, Hungary, Poland, Romania, Slovakia, Slovenia, Switzerland.
CEOI 2014
was held in

Jena Jena () is a German city and the second largest city in Thuringia. Together with the nearby cities of Erfurt and Weimar, it forms the central metropolitan area of Thuringia with approximately 500,000 inhabitants, while the city itself has a popu ...

, Germany (18 - 24 June 2014).
CEOI 2013
was held in

Primošten Primošten (; it, Capocesto) is a village and municipality in Šibenik-Knin County, Croatia. It is situated in the south, between the cities of Šibenik and Trogir, on the Adriatic coast. Demographics The total population of the municipality is ...

, Croatia (13 - 19 October 2013). Participants: Croatia, Czech republic, Germany, Hungary, Poland, Romania, Switzerland, Slovakia and Slovenia.
CEOI 2012
was held in Tata, Hungary (7-13 July 2012). Participants: Bulgaria, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Israel, Switzerland, The Netherlands, Slovakia and Slovenia.
CEOI 2011
was held in

Gdynia Gdynia ( ; ; german: Gdingen (currently), (1939–1945); csb, Gdiniô, , , ) is a city in northern Poland and a seaport on the Baltic Sea coast. With a population of 243,918, it is the List of cities in Poland, 12th-largest city in Poland and ...

, Poland (7-12 July 2011). Participants: Bulgaria, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia and Switzerland.
CEOI 2010
was held in

Košice Košice ( , ; german: Kaschau ; hu, Kassa ; pl, Коszyce) is the largest city in eastern Slovakia. It is situated on the river Hornád at the eastern reaches of the Slovak Ore Mountains, near the border with Hungary. With a population of app ...

, Slovakia (12-19 July 2010). Participants: Bulgaria, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, and Switzerland.Czech Mathematical Olympiad, Category P – Past and Future CEOIs

CEOI 2009
was held in

Târgu Mureş Târgu (Romanian for "the market") starts off the names of several places in Romania: * Târgu Bujor * Târgu Cărbunești * Târgu Frumos * Târgu Gânguleşti *Târgu Jiu * Târgu Lăpuș * Târgu Logreşti * Târgu Mureș *Târgu Neamț * Târgu ...

, Romania (8-14 July 2009). Participants: Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Switzerland, USA., Serbia, Moldova.
CEOI 2008
was held in

Dresden Dresden (, ; Upper Saxon: ''Dräsdn''; wen, label=Upper Sorbian, Drježdźany) is the capital city of the German state of Saxony and its second most populous city, after Leipzig. It is the 12th most populous city of Germany, the fourth larg ...

, Germany (6-12 July 2008). Participants: Croatia, Czech Republic, Germany, Hungary, Israel, Poland, Romania, Saxony, Slovakia.
CEOI 2007
was held in

, Czech Republic (1 - 7 July 2007). Participants: Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Czech Republic II, Brno.
CEOI 2006
was held in

Vrsar Vrsar ( vec, Orsera) is a small seaside town and a municipality in Istria, Croatia located 9 kilometers south of Poreč. The historical center is located on top of a hill, including the St. Martin parish church and the 40-meter high bell tower. I ...

, Croatia (1 - 8 July 2006). Participants: Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Croatia II, Croatia III.
CEOI 2005
was held in

Sárospatak Sárospatak (german: Potok am Bodroch; la, Potamopolis; sk, Šarišský Potok or ; ) is a town in Borsod-Abaúj-Zemplén County, northern Hungary. It lies northeast from Miskolc, in the Bodrog river valley. The town, often called simply ''Pa ...

, Hungary (28 July - 5 August, 2005). Participants: Bosnia and Herzegovina, Croatia, Czech Republic, Estonia, France, Germany, Hungary, Poland, Romania, Sárospatak, Slovakia, Spain, The Netherlands.
CEOI 2004
was held in

Rzeszów Rzeszów ( , ; la, Resovia; yi, ריישא ''Raisha'')) is the largest city in southeastern Poland. It is located on both sides of the Wisłok River in the heartland of the Sandomierz Basin. Rzeszów has been the capital of the Subcarpathian Vo ...

, Poland (13 July - 17 July 2004). Participants: Bosnia & Herzegovina, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia
CEOI 2003
was held in

Münster Münster (; nds, Mönster) is an independent city (''Kreisfreie Stadt'') in North Rhine-Westphalia, Germany. It is in the northern part of the state and is considered to be the cultural centre of the Westphalia region. It is also a state di ...

, Germany (5 - 12 July 2003). Participants: Croatia, Poland, Czech Republic, Slovenia, Netherlands, USA, Hungary, Slovakia, Romania, Iran, Germany, Westphalia
CEOI 2002
was held in

, Slovakia (30 June - 6 July 2002). Participants: Austria, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia, The Netherlands, Iran
CEOI 2001
was held in

Zalaegerszeg Zalaegerszeg (; hr, Jegersek; sl, Jageršek; german: Egersee) is the administrative center of Zala county in western Hungary. Location Zalaegerszeg lies on the banks of the Zala River, close to the Slovenian and Austrian borders and west-south ...

, Hungary (10 - 17 August 2001). Participants: Austria, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia, Estonia, Finland, Italy, The Netherlands
CEOI 2000
was held in

Cluj-Napoca ; hu, kincses város) , official_name=Cluj-Napoca , native_name= , image_skyline= , subdivision_type1 = Counties of Romania, County , subdivision_name1 = Cluj County , subdivision_type2 = Subdivisions of Romania, Status , subdivision_name2 ...

, Romania (24 - 31 August 2000). Participants: Croatia, Czech Republic, Germany, Hungary, Moldova, Netherlands, Poland, Romania, Slovakia, Slovenia, USA
CEOI 1999
was held in

, Czech Republic (2 - 9 September 1999). Participants: Bosnia-Herzegovina, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia, USA
CEOI 1998
was held in

Zadar Zadar ( , ; historically known as Zara (from Venetian and Italian: ); see also other names), is the oldest continuously inhabited Croatian city. It is situated on the Adriatic Sea, at the northwestern part of Ravni Kotari region. Zadar serv ...

, Croatia (20 - 27 May 1998). Participants: Bosnia-Herzegovina, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia
CEOI 1997
was held in

Nowy Sącz Nowy Sącz (; hu, Újszandec; yi, Tzanz, צאַנז; sk, Nový Sonč; german: Neu-Sandez) is a city in the Lesser Poland Voivodeship of southern Poland. It is the district capital of Nowy Sącz County as a separate administrative unit. It has ...

, Poland (17 - 24 July 1997). Participants: Belarus, Croatia, Estonia, Germany, Hungary, Latvia, Lithuania, Netherlands, Poland, Romania, Slovakia, Ukraine, USA, Yugoslavia
CEOI 1996
was held in

, Slovak Republic (9 - 13 October 1996). Participants: Croatia, Czech Republic, Hungary, Poland, Romania, Slovakia, Slovenia
CEOI 1995
was held in

Szeged Szeged ( , ; see also #Etymology, other alternative names) is List of cities and towns of Hungary#Largest cities in Hungary, the third largest city of Hungary, the largest city and regional centre of the Southern Great Plain and the county seat ...

, Hungary (29 May - 3 June 1995). Participants: Belarus, Croatia, Czech Republic, Estonia, Hungary, Lithuania, Poland, Romania, Slovakia, Ukraine, Yugoslavia * CEOI 1994 was held in

, Romania (27 - 31 May 1994). Participants: Croatia, Czech Republic, Hungary, Moldova, Poland, Romania, Turkey, Yugoslavia

External links

{{Reflist
CEOI archives

International Science Olympiads

Informatics Informatics is the study of computational systems, especially those for data storage and retrieval. According to ACM ''Europe and'' ''Informatics Europe'', informatics is synonymous with computer science and computing as a profession, in which ...

Information technology organizations based in Europe Programming contests

List of CEOI websites and locations

See also

External links