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

informatics Informatics is the study of computational systems. According to the Association for Computing Machinery, ACM Europe Council and Informatics Europe, informatics is synonymous with computer science and computing as a profession, in which the centra ...

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 or sport programming is a mind sport involving participants trying to program according to provided specifications. The contests are usually held over the Internet or a local network. Competitive programming is recogn ...

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 Rigour#Mathematics, mathematically rigorous instructions, typically used to solve a class of specific Computational problem, problems or to perform a computation. Algo ...

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 competition and one of the International Science Olympiads Student competition, for secondary school students. The first IOI was held in 1989 in Pravetz, Bulgar ...

(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, north of the country, along the Sava river, at the southern slopes of the ...

Croatia Croatia, officially the Republic of Croatia, is a country in Central Europe, Central and Southeast Europe, on the coast of the Adriatic Sea. It borders Slovenia to the northwest, Hungary to the northeast, Serbia to the east, Bosnia and Herze ...

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

Nagykanizsa Nagykanizsa (; , or just ''Kaniža/Kanjiža''; ; ; ; ), known colloquially as Kanizsa, is a medium-sized city in Zala County in southwestern Hungary. It is a city with county rights. It lies not far from Lake Balaton at the meeting point of five ...

Hungary Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, 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 and ...

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

Bratislava Bratislava (German: ''Pressburg'', Hungarian: ''Pozsony'') is the Capital city, capital and largest city of the Slovakia, Slovak Republic and the fourth largest of all List of cities and towns on the river Danube, cities on the river Danube. ...

Slovakia Slovakia, officially the Slovak Republic, 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 west, and the Czech Republic to the northwest. Slovakia's m ...

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

Warsaw Warsaw, officially the Capital City of Warsaw, is the capital and List of cities and towns in Poland, largest city of Poland. The metropolis stands on the Vistula, River Vistula in east-central Poland. Its population is officially estimated at ...

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...

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

Ljubljana {{Infobox settlement , name = Ljubljana , official_name = , settlement_type = Capital city , image_skyline = {{multiple image , border = infobox , perrow = 1/2/2/1 , total_widt ...

, Slovenia (10 - 15 July 2017)
Results

CEOI 2016
was held in

Piatra Neamț Piatra Neamț (; ; ) is the capital city of Neamț County, in the historical region of Western Moldavia, in northeastern Romania. Because of its very privileged location in the Divisions of the Carpathians, Eastern Carpathian mountains, it is con ...

, 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 ( , ; ) is a Statutory city (Czech Republic), city in the South Moravian Region of the Czech Republic. Located at the confluence of the Svitava (river), Svitava and Svratka (river), Svratka rivers, Brno has about 403,000 inhabitants, making ...

, 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 List of cities and towns in Germany, city in Germany 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 in ...

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

Primošten Primošten () is a village and municipality in Šibenik-Knin County, Croatia. It is situated between the cities of Šibenik and Trogir, on the Adriatic coast. History In the past, Primošten was situated on the islet close to the mainland. Durin ...

, 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 is a city in northern Poland and a seaport on the Baltic Sea coast. With an estimated population of 257,000, it is the List of cities in Poland, 12th-largest city in Poland and the second-largest in the Pomeranian Voivodeship after Gdańsk ...

, 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 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 approximately 230,000, Košice is the second-largest cit ...

, 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 language, Romanian for "the market") starts off the names of several places in Romania: *Târgu Bujor *Târgu Cărbunești *Târgu Frumos *Berbești, Târgu Gânguleşti *Târgu Jiu *Târgu Lăpuș *Logrești, Târgu Logreşti *Tâ ...

, 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 German, Upper Saxon: ''Dräsdn''; , ) is the capital city of the States of Germany, German state of Saxony and its second most populous city after Leipzig. It is the List of cities in Germany by population, 12th most p ...

, 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, 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 (; ; Serbian language, Serbian: Муд Стреам; Slovak language, Slovakian: ''Šarišský Potok, Blatný Potok)'' History The area has been inhabited since ancient times. Sárospatak was granted town status in 1201 by Emeric ...

, 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 ( , ) 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 is the capital of the Subcarpathian Voivodeship and the county seat, seat of Rzeszów C ...

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

Münster Münster (; ) is an independent city#Germany, 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 ...

, 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 (; ; ; ) is the administrative center of Zala County, Zala county in western Hungary. Location Zalaegerszeg lies on the banks of the Zala River, close to the Slovenian and Austrian borders, and west-southwest of Budapest by road. Hi ...

, 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 Cluj-Napoca ( ; ), or simply Cluj ( , ), is a city in northwestern Romania. It is the second-most populous city in the country and the seat of Cluj County. Geographically, it is roughly equidistant from Bucharest (), Budapest () and Belgrade ( ...

, 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 city in Croatia. It is situated on the Adriatic Sea, at the northwestern part of Ravni Kotari region. Zadar ...

, 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 (; ; ; ; ) 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. With a population of 83,116 as of 2021, it is the largest city in the Beskid S ...

, 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. According to the Association for Computing Machinery, ACM Europe Council and Informatics Europe, informatics is synonymous with computer science and computing as a profession, in which the centra ...

Information technology organizations based in Europe Programming contests

List of CEOI websites and locations

See also

External links