The International Olympiad in Informatics (IOI) is an annual informatics competition for secondary school students. The first IOI was held in 1989. Image File history File links No higher resolution available. ... Computer science, or computing science, is the study of the theoretical foundations of information and computation and their implementation and application in computer systems. ... The International Science Olympiads are a group of worldwide annual competitions in various areas of science. ... Year 1989 (MCMLXXXIX) was a common year starting on Sunday (link displays 1989 Gregorian calendar). ...

The contest consists of two days computer programming, solving problems of an algorithmic nature. Students compete on an individual basis, with up to four students competing from each participating country (with around 81 countries in 2004). Students are selected through national computing contests. For example, in Britain, students compete in the BIO for a place in the national team. In mathematics, computing, linguistics, and related disciplines, an algorithm is a finite list of well-defined instructions for accomplishing some task that, given an initial state, will terminate in a defined end-state. ... The British Informatics Olympiad (BIO) is an annual computer-programming competition for secondary and sixth-form students. ...

Structure of the competition

On each of the two competition days, the students are typically given three problems which they have to solve in five hours. Each student works on his/her own, with only a computer and no other help allowed, specifically no communication with other contestants, books etc. Usually to solve a task the contestant has to write a computer program (in C, C++ or Pascal) and submit it before the five hour competition time ends. Later on, the program is graded by being run with secret test data, consisting of multiple (typically 10 or 20) test cases. The contestant is awarded points for each test case that his program solves correctly, and within the given time and memory limit. In some cases, the contestant's program has to interact with a secret computer library, which allows problems where the input is not fixed, but depends on the program's actions - for example in game problems. Another new type of problems has known inputs which are publicly available already during the five hours of the contest. For these, the contestants have to submit the according output file instead of a program, and it is up to them whether they obtain the output files by writing a program (possibly exploiting special characteristics of the input), or by hand, or by a combination of these means. C is a general-purpose, block structured, procedural, imperative computer programming language developed in 1972 by Dennis Ritchie at the Bell Telephone Laboratories for use with the Unix operating system. ... C++ (pronounced see plus plus, IPA: ) is a general-purpose programming language with high-level and low-level capabilities. ... Pascal is an imperative computer programming language, developed in 1970 by Niklaus Wirth as a language particularly suitable for structured programming. ... In software engineering, a test case is a set of conditions or variables under which a tester will determine if a requirement upon an application is partially or fully satisfied. ...

The scores from the two competition days and all problems are summed up separately for each contestant. At the awarding ceremony, contestants are awarded medals depending on their relative total score. The top 50% of the contestants (i.e. two per country, on average) are awarded medals, such that the relative number of gold : silver : bronze : no medal is approximately 1:2:3:6 (thus 1/12 of the contestants get a gold medal).

The competition room at the IOI 2006

Unlike other science olympiads, the IOI regulations specifically prohibit ranking by countries. Although unofficial rankings are circulated within some participating nations, there is therefore no standard. Image File history File links Size of this preview: 800 × 600 pixelsFull resolution (2048 × 1536 pixel, file size: 1. ... Image File history File links Size of this preview: 800 × 600 pixelsFull resolution (2048 × 1536 pixel, file size: 1. ...

List of IOI websites and locations

• IOI 2011 will be held in Thailand, 2011
• IOI 2010 will be held in Waterloo, Ontario, Canada, 2010
• IOI 2009 will be held in Plovdiv, Bulgaria, 2009
• IOI 2008 will be held in Cairo, Egypt, 2008 [1]
• IOI 2007 was held in Zagreb, Croatia, August 15 - 22, 2007 [2] (results)
• IOI 2006 was held in Mérida, Yucatán, Mexico, August 13 - 20, 2006 [3] (results)
• IOI 2005 was held in Nowy Sącz, Poland, August 18 - 25, 2005 [4] (results)
• IOI 2004 was held in Athens, Greece, September 11 - 18, 2004 [5] (results)
• IOI 2003 was held in Kenosha, Wisconsin, USA, August 16 - 23, 2003 [6] (results)
• IOI 2002 was held in Yong-In, Republic of Korea, August 18 - 25, 2002 [7]
• IOI 2001 was held in Tampere, Finland, July 14 - 21, 2001 [8]
• IOI 2000 was held in Beijing, People's Republic of China, September 23 - 30, 2000
• IOI 1999 was held in Antalya-Belek, Turkey, October 9 - 16, 1999 [9]
• IOI 1998 was held in Setúbal, Portugal, September 5 - 12, 1998
• IOI 1997 was held in Cape Town, South Africa, November 30 - December 7, 1997
• IOI 1996 was held in Veszprém, Hungary, July 25 - August 2, 1996
• IOI 1995 was held in Eindhoven, The Netherlands, June 26 - July 3, 1995 [10]
• IOI 1994 was held in Haninge, Sweden, July 3 - 10, 1994
• IOI 1993 was held in Mendoza, Argentina, October 16 - 25, 1993 [11]
• IOI 1992 was held in Bonn, Germany, July 11 - 21, 1992
• IOI 1991 was held in Athens, Greece, May 19 - 25, 1991
• IOI 1990 was held in Minsk, Belarusian SSR, Soviet Union, July 15 - 21, 1990
• IOI 1989 was held in Pravetz, Bulgaria, May 16 - 19, 1989.

2011 (MMXI) will be a common year starting on Saturday of the Gregorian calendar. ... , Waterloo, Ontario, Canada is the smallest of the three cities in the Regional Municipality of Waterloo, and is adjacent to the larger city of Kitchener. ... 2010 (MMX) will be a common year starting on Friday of the Gregorian calendar. ... Plovdiv (Bulgarian: ) is the second-largest city in Bulgaria after Sofia, with a population of 341,873([1]). It is the administrative centre of Plovdiv Province in southern Bulgaria, as well as the largest and most important city of the historical region of Upper (or Northern) Thrace, famous for its... 2009 (MMIX) will be a common year starting on Thursday of the Gregorian calendar. ... Nickname: Egypt: Site of Cairo (top center) Coordinates: , Government  - Governor Dr. Abdul Azim Wazir Area  - City 214 km²  (82. ... 2008 (MMVIII) will be a leap year starting on Tuesday of the Gregorian calendar. ... Location of Zagreb within Croatia Coordinates: , Country Croatia RC diocese 1094 Free royal city 1242 Unified 1850 Government  - Mayor Milan Bandić Area [1]  - City 641. ... is the 227th day of the year (228th in leap years) in the Gregorian calendar. ... is the 234th day of the year (235th in leap years) in the Gregorian calendar. ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ... Cathedral on the Plaza Mayor, the oldest in North America [1]. Mérida is the capital city of the Mexican state of Yucatán. ... Yucatán is the name of one of the 31 states of Mexico, located on the north of the Yucatán Peninsula. ... is the 225th day of the year (226th in leap years) in the Gregorian calendar. ... is the 232nd day of the year (233rd in leap years) in the Gregorian calendar. ... Year 2006 (MMVI) was a common year starting on Sunday of the Gregorian calendar. ... Coordinates: , Country Poland Voivodeship Lesser Poland Powiat City County Gmina Nowy SÄ…cz Estabilished 1292 City Rights 1292 Government  - Mayor Ryszard Nowak Area  - Town 57 km²  (22 sq mi) Population (2005)  - Town 84,594  - Density 1,484. ... is the 230th day of the year (231st in leap years) in the Gregorian calendar. ... is the 237th day of the year (238th in leap years) in the Gregorian calendar. ... Year 2005 (MMV) was a common year starting on Saturday (link displays full calendar) of the Gregorian calendar. ... Athens is the largest and the capital city of Greece, located in the Attica periphery. ... is the 254th day of the year (255th in leap years) in the Gregorian calendar. ... is the 261st day of the year (262nd in leap years) in the Gregorian calendar. ... Year 2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar. ... Nickname: K-town Keno Kenowhere Location of Kenosha within Wisconsin Coordinates: Country United States State Wisconsin Counties Kenosha Settled 1836 Government  - Mayor John M. Antaramian Population  - City 96,845  - Density  3,795. ... is the 228th day of the year (229th in leap years) in the Gregorian calendar. ... is the 235th day of the year (236th in leap years) in the Gregorian calendar. ... Year 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... Yongin is in the middle of Gyeonggi Province, South Korea, approximately 40 km south of Seoul. ... is the 230th day of the year (231st in leap years) in the Gregorian calendar. ... is the 237th day of the year (238th in leap years) in the Gregorian calendar. ... Also see: 2002 (number). ... Tampere ( , Tammerfors in Swedish) is a city in southern Finland located between two lakes, Näsijärvi and Pyhäjärvi. ... is the 195th day of the year (196th in leap years) in the Gregorian calendar. ... is the 202nd day of the year (203rd in leap years) in the Gregorian calendar. ... Year 2001 (MMI) was a common year starting on Monday (link displays the 2001 Gregorian calendar). ... Beijing (Chinese: 北京; pinyin: BÄ›ijÄ«ng; Wade-Giles: Peiching or Pei-ching; IPA: ; literally Northern capital;  ), a metropolis in northern China, is the capital of the Peoples Republic of China (PRC). ... is the 266th day of the year (267th in leap years) in the Gregorian calendar. ... is the 273rd day of the year (274th in leap years) in the Gregorian calendar. ... Year 2000 (MM) was a leap year starting on Saturday (link will display full 2000 Gregorian calendar). ... Antalya (formerly known as Adalia; from Pamphylian Greek: Αττάλεια Attália) is a large town and tourist destination, situated on the Mediterranean coast of southwestern Turkey. ... is the 282nd day of the year (283rd in leap years) in the Gregorian calendar. ... is the 289th day of the year (290th in leap years) in the Gregorian calendar. ... This article is about the year. ... Location    - Country Portugal    - Region Lisboa  - Subregion Península de Setúbal  - District or A.R. Setúbal Mayor Maria das Dores Meira  - Party CDU Area 171. ... is the 248th day of the year (249th in leap years) in the Gregorian calendar. ... is the 255th day of the year (256th in leap years) in the Gregorian calendar. ... Year 1998 (MCMXCVIII) was a common year starting on Thursday (link will display full 1998 Gregorian calendar). ... Nickname: Motto: Spes Bona (Latin for Good Hope) Location of the City of Cape Town in Western Cape Province Coordinates: , Country Province Municipality City of Cape Town Metropolitan Municipality Founded 1652 Government [1]  - Type City council  - Mayor Helen Zille  - City manager Achmat Ebrahim Area  - City 2,499 km²  (964. ... is the 334th day of the year (335th in leap years) in the Gregorian calendar. ... is the 341st day of the year (342nd in leap years) in the Gregorian calendar. ... For the band, see 1997 (band). ... Veszprém (in Slovak Vesprím) is a city with county rights in western Hungary. ... is the 206th day of the year (207th in leap years) in the Gregorian calendar. ... is the 214th day of the year (215th in leap years) in the Gregorian calendar. ... Year 1996 (MCMXCVI) was a leap year starting on Monday (link will display full 1996 Gregorian calendar). ... Country Netherlands Province North Brabant Government  - Mayor Alexander Sakkers (VVD) Area (2006)  - Municipality 88. ... is the 177th day of the year (178th in leap years) in the Gregorian calendar. ... is the 184th day of the year (185th in leap years) in the Gregorian calendar. ... Year 1995 (MCMXCV) was a common year starting on Sunday (link will display full 1995 Gregorian calendar). ... Haninge is a Municipality in Stockholm County,in central Sweden. ... is the 184th day of the year (185th in leap years) in the Gregorian calendar. ... is the 191st day of the year (192nd in leap years) in the Gregorian calendar. ... Year 1994 (MCMXCIV) was a common year starting on Saturday (link will display full 1994 Gregorian calendar). ... Gates of General San Martín Park Mendoza is a city in the west of Argentina, and the capital of Mendoza Province. ... is the 289th day of the year (290th in leap years) in the Gregorian calendar. ... is the 298th day of the year (299th in leap years) in the Gregorian calendar. ... Year 1993 (MCMXCIII) was a common year starting on Friday (link will display full 1993 Gregorian calendar). ... Bonn is the 19th largest city in Germany, located about 20 kilometres south of Cologne on the river Rhine in the Federal State of North Rhine-Westphalia. ... is the 192nd day of the year (193rd in leap years) in the Gregorian calendar. ... is the 202nd day of the year (203rd in leap years) in the Gregorian calendar. ... Year 1992 (MCMXCII) was a leap year starting on Wednesday (link will display full 1992 Gregorian calendar). ... Athens is the largest and the capital city of Greece, located in the Attica periphery. ... is the 139th day of the year (140th in leap years) in the Gregorian calendar. ... is the 145th day of the year (146th in leap years) in the Gregorian calendar. ... Year 1991 (MCMXCI) was a common year starting on Tuesday (link will display the 1991 Gregorian calendar). ... Location of Minsk, shown within the Minsk Voblast Coordinates: Country Subdivision Belarus Minsk Founded 1067 Government  - Mayor Mikhail Pavlov Area  - City 305. ... Motto none Anthem Мы, беларусы(Belarusian) My, Belarusy(transliteration) We Belarusians Belarus() on the European continent()  —  [] Capital (and largest city) Minsk Official languages Belarusian, Russian Government Presidential republic  -  President Alexander Lukashenko  -  Prime Minister Sergey Sidorsky Independence from the Soviet Union   -  Declared July 27, 1990   -  Established August 25, 1991   -  Completed December 25, 1991... is the 196th day of the year (197th in leap years) in the Gregorian calendar. ... is the 202nd day of the year (203rd in leap years) in the Gregorian calendar. ... Year 1990 (MCMXC) was a common year starting on Monday (link displays the 1990 Gregorian calendar). ... Pravets (Bulgarian: Правец, also transliterated as Pravets, Pravetz or Pravec) is a town in central western Bulgaria, located approximately 60 km from the capital Sofia. ... May 16 is the 136th day of the year (137th in leap years) in the Gregorian calendar. ... is the 139th day of the year (140th in leap years) in the Gregorian calendar. ... Year 1989 (MCMLXXXIX) was a common year starting on Sunday (link displays 1989 Gregorian calendar). ...

Multiple IOI Winners

The following is a list of the top 20 performers in the history of the IOI. First (I), second (II) and third (III) places among gold medalists are indicated where appropriate.

See also

• International science olympiad
• ACM International Collegiate Programming Contest
• Central European Olympiad in Informatics
• British Informatics Olympiad
• National Olympiad in Informatics, China
• USACO
• Indian Computing Olympiad
• Turkish Informatics Olympiad
• Ukrainian Olympiad in Informatics

The International Science Olympiads are a group of worldwide annual competitions in various areas of science. ... ACM International Collegiate Programming Contest (abbreviated as ACM-ICPC or just ICPC) is an annual multi-tiered competition among the universities of the world. ... The Central European Olympiad in Informatics (CEOI) is an annual informatics competition for secondary school students. ... The British Informatics Olympiad (BIO) is an annual computer-programming competition for secondary and sixth-form students. ... The National Olympiad in Informations (NOI) is an annual informatics competition for secondary school students. ... The United States of America Computing Olympiad (USACO) is an annual computer programming competition for secondary school students in the United States. ... The Indian Computing Olympiad is an annual computer programming competition that selects four participants to represent India at the International Olympiad in Informatics. ... The Turkish Informatics Olympiad (Ulusal Bilgisayar Olimpiyatı, in Turkish) is an annual programming contest organized by the Scientific and Technological Research Council of Turkey (TUBITAK). ... // Ukrainian Olympiad in Informatics The Ukrainian Olympiad in Informatics (UOI) is an annual informatics competition for secondary school students who live in Ukraine. ...

External links

• IOI International Committee Website
• IOI Secretariat Website
• IOI 2004 (held in Athens,Greece) website
• IOI 2005 Website
• IOI 2006 Website
• IOI 2007 Website
• Photos from some former Informatics Olympiads.
• Greek National Olympiad in Informatics (pages in Greek)
• Iranian National Olympiad in Informatics
• Ukrainian Olympiad in Informatics
• Mexican Olympiad in Informatics(Spanish)