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New CEOI Rules

Regulations of Central European Olympiad in Informatics

(Approved by General Assembly held at CEOI 2007 in Brno, Czech Republic)


The Olympiad is organized by the Ministry of Education or another one of the eight Central European countries. According to the rules accepted by the CEOs, teams of eight Central European countries, ie Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovak Republic and Slovenia (suspended), are invited as regular participants. Moreover, the guest country may invite guest participants as well. The International Committee (IC) is one of the eight team leaders and a representative of the country. A guest who is willing to organize and CEOI in a given year in his country, has announce its intent at least one year before that CEOI (during the previous CEOI competition days). Selection of the next guest is made by the IC by a majority vote. The Revision of the CEOs is adopted by the IC by a 2/3 majority vote. Enlarging or decreasing set of CEOI countries can only be adopted by consensus.


The CEOI aims at motivating secondary school students of Central Europe to: get more interested in informatics and information technology in general, test and conduct their skills in solving problems with help of computers, exchange knowledge and experience with other students , establish personal contacts with young people of the Central European region. Additionally, the CEOI may: provide training for students participating in the International Olympiad in Informatics (IOI), initiate discussion and cooperation in informatics education at the secondary schools of the Central European countries.

General Regulations

Each team is composed of four secondary school students, team leader and deputy team leader. Only the cost of travel to and from the competition should be paid by teams; all local expenses are covered by the organizers. Accompanying persons and observers are welcome to pay for their stay. Interested people are advised to contact the local organizers. The official language is English. Students may use their native languages. Programming problems will be formulated in English and then translated by the team leaders to the native language of their team. Both versions will be given to the students. Team leaders must be able to speak and write in English, as well as the language of their team. The computers will be IBM PC compatibles with selected software packages. Only computers and software with built-in help are provided by the organizers. In particular, the use of printed materials and electronic devices brought by the contestants will be forbidden. The programming languages of the contest are Pascal, C and C ++; the exact versions of these languages will be updated each year. The compilers and programming environments for the above mentioned programming languages will be installed on the hard disk.

Team Composition

Students (contestants) have been in school for the year when the contest is held and at 19 years old. The team leader will be a member of the General Assembly. Observers and persons accompanying and delegation have to pay and fee.

General Assembly

The General Assembly (GA) is the leader of the participating countries and the president nominated by the host country. The General Assembly Selects Problems was solved in the competition from a set of problems prepared and proposed by the Scientific Committee. The selection procedure is as follows: The chairperson of the Scientific Committee distributes the proposals. Their number equals the number of problems to be solved by the contestants. The GA members can either accept or, in case of major ambition, form other serious reasons, deny the proposals by voting. When and if a proposal is made, another prepared proposal will be offered to the GA. For such cases, the Scientific Committee should prepare at least two extra proposals for each round. The text of the accepted proposals must not be changed by the GA, except for minor rephrasing that is needed to avoid smaller ambiguities. The selected problems will be translated by the team leaders into the native languages of the teams.

Scientific Committee

The Scientific Committee (SC) is a chairperson and a number of experts (SC members) from the host country. It becomes active well before the beginning of the Olympiad and has the task of selecting and preparing problem proposals. A further task of the Scientific Committee is to test and evaluate the solutions of the contestants.

Problems, Competition

The competition consists of two rounds in two days. In both rounds the working time is five hours and the contestants will be given three problems to solve. The selected problems will be translated by the team leaders into the native languages of the teams. Contestants may submit written questions to the Scientific Committee on the formulation and interpretation of problems during the initial period of each competition round. Contestants may use their native language when asking questions; further details will be regulated by each year's competition rules.

The host country publishes competition rules that include the description of the competition environment and details of the competition at least one before CEOI starts. No special hardware requirement or software packages will be needed to solve the problems. The whole communication between the CEOs and the contestants will be in a written form.


When the working time is over, the solutions of each of the contestants will be checked by an evaluator. The evaluation is based on the test data and responses of the programs only. The evaluation procedure is concluded with the meeting of the Scientific Committee, where the evaluation reports are discussed. Potential disagreements are dissolved by voting. Achieving and proper and balanced evaluation is the responsibility of the Scientific Committee. If a team leader does not accept the results of the evaluation, he / she may appeal to the General Assembly. Finally, the president of SC or IC presents the anonymous results to the General Assembly.

Results and Prizes

The General Assembly will determine the minimum scores for gold, silver and bronze medals. The proportion of these gold, silver and bronze medals should be approximately 1: 2: 3. About 50% of the contestants should receive medals. Each contestant will receive a certificate of participation. The medals, certificates and other prizes will be given to the contestants at the official closing ceremony.