Contest Rules

Important changes are in red.

Introduction

The ICPC, the “International Collegiate Programming Contest”, is an extra-curricular, competitive programming sport of the universities of the world. ICPC competitions provide gifted students with opportunities to interact, demonstrate, and improve their teamwork, programming, and problem-solving prowess. The ICPC is a global platform for academia, industry, and community to shine the spotlight on and raise the aspirations of the next generation of computing professionals as they pursue excellence.
Northern Eurasia Finals (the Contest) is the contest for Northern Eurasia teams with best teams qualifying for World Finals of ICPC.
Due to COVID-19, 2020/2021 season has special regulations that override these rules where applicable.
Teams first compete in Regional Contests. The winning teams from each Regional Contest qualify to advance to Northern Eurasia Finals, December 2020.
Northern Eurasia Finals is simultaneously organized at:
- Saint Petersburg — St. Petersburg ITMO University;
- Barnaul — Altai State Technical University;
- Almaty — Kazakh-British Technical University;
- Tbilisi — Business and Technology University.

Localization

The official language of the Contest is English. All written contest materials will be in English.
The secondary language of the Contest is Russian. All announcements will be made in both Russian and English.
The Director and the Organizing Committee of the Regional Contests may use additional languages of the Regional Contest participants.

Conduct of a Regional Contest

Board of directors of Northern Eurasia Regional Contests:
- establishes Organizational Committee of the Northern Eurasia Finals;
- prepares recommendations to the Organizational Committee concerning Jury and Technical Committee;
- appoints directors of Regional Contests in Northern Eurasia;
- solves questions concerning organization of new Regional Contests in Northern Eurasia.
Organizational Committee of Northern Eurasia Finals:
- settles dates of the final round of the Contest;
- settles possible dates of the Regional Contests of the Northern Eurasia Finals;
- approves Jury and Technical Committee put forward by the Director of the Contest;
- creates and approves the expense estimate of the Contest;
- approves Technical Regulations of the Contest put forward by Jury and Technical Committee;
- determines the place of residence for competitors, delegation heads, Jury members and Technical Committee members;
- determines the venue of the Contest and issues the corresponding order;
- supplies of the venue of the Contest with computers according to the these Regulations, Technical Regulations, safety measures and hygiene and sanitary standards;
- carries out registration of participants;
- organizes and carries out the award ceremony for the Contest participants;
- analyzes and generalizes the Contest results.
The Northern Eurasia Finals Jury consists of the Jury Chairman and other Jury members.
The Northern Eurasia Finals Jury:
- proposes problems for the Northern Eurasia Finals;
- the Head of Jury forms the Executive Committee of the Jury.
Executive Committee of the Jury:
- prepares the Technical Regulations together with the Technical Committee;
- evaluates the proposed problems and forms the set of the problems for the Contest;
- develops and approves the problem statements for the Contest;
- develops the tests for submission evaluation for the final round of the Contest, including automated problem checkers;
- conducts evaluation of competitors' submissions on the Contest;
- prepares the standings of the Contest;
- makes the final decision on the disqualification of the participants, who violate the Rules or the Regulations of the Contest;
- determines the Contest winner and awardees;
- forms the supplementary set of problems and tests for the Regional Contests.
The Technical Committee of the Northern Eurasia Finals consists of the Head of the Technical Committee and other Technical Committee members.
The Technical Committee of the Northern Eurasia Finals:
- prepares the Technical Regulations together with the Executive Committee of the Jury;
- carries out configuration of computers according to the Technical Regulations;
- ensures uninterrupted operation of computers during the Contest;
- ensures the conduct of the Contest in the correspondence to these Regulations and the Contest Rules.

Organization of the Regional Contests

The Regional Contest Director is appointed by the Board of directors of the Northern Eurasia Regional Contests
The Regional Contest Director:
- establishes Organizational Committee of the Regional Contest;
- prepares recommendations to the Organizational Committee of the Regional Contest concerning Jury and Technical Committee of the Regional Contest.
Organizational Committee of the Regional Contest:
- settles the dates of the Regional Contest;
- approves Jury and Technical Committee of the Regional Contest put forward by the Regional Contest Director;
- creates and approves the expense estimate of the Regional Contest;
- approves Technical Regulations of the Regional Contest put forward by Jury and Technical Committee of the Regional Contest;
- determines the place of residence for competitors, delegation heads, members of the Jury and the Technical Committee of the Regional Contest;
- determines the venue of the Regional Contest and issues the corresponding order;
- supplies the venue of the Regional Contest with computers according to the these Regulations, Technical Regulations, safety measures and hygiene and sanitary standards;
- carries out registration of participants;
- organizes and carries out the award ceremony for the Regional Contest participants;
- analyzes and generalizes the results of the Regional Contest.
The Jury of the Regional Contest consists of the Head of the Jury and at least three other Jury members.
The Jury of the Regional Contest:
- prepares the Technical Regulations of the Regional Contest together with the Technical Committee of the Regional Contest;
- develops and approves the problem statements and the tests for submission evaluation for the Regional Contests or takes the decision to use the set of the problems formed by Executive Committee of the Jury of the Regional Contest;
- conducts evaluation of competitors' submissions on the Regional Contest;
- makes the final decision on the disqualification of the participants, who violate the Rules or the Regulations of the Regional Contest;
- prepares the Regional Contest standings;
- determines the Regional Contest winner and awardees.
The Head of the Jury of the Regional Contest forms the Executive Committee of the Jury of the Regional Contest if necessary. In other case, all duties of the Executive Committee are held by the Jury.
The Technical Committee of the Regional Contest consists of the Head of Technical Committee and Technical Committee members.
The Technical Committee of the Regional Contest:
- prepares the Technical Regulations of the Regional Contest together with the Jury of the Regional Contest;
- carries out configuration of the computers according to the Technical Regulations of the Regional Contest;
- ensures uninterrupted functioning of the machinery during the Regional Contest;
- ensures the conduct of the Regional Contest in the correspondence to these Regulations and the Regional Contest Rules.

Team Composition

A representative of the sponsoring institution of higher education, typically a faculty member, must serve as or designate the team coach. The coach certifies the eligibility of contestants and serves as the official point of contact with the team prior to and during contest activities. A team may only have one coach.
The coach must fully register teams in the ICPC Registration System 7 days before the Regional Contest. A team is not eligible to compete in the Regional Contest until the Regional Contest director has accepted the team in the web registration system. Teams failing to comply with any of these requirements will be ruled ineligible to compete. Only registered reserves may be substituted for contestants. Such substitutions must be entered in the ICPC Registration System by the regional contest director before the contest begins.
Each team consists of three contestants and may have at most one official reserve. Teams with fewer than three are ineligible. Each contestant and reserve must satisfy the following competitor eligibility requirements.
- A student must be willing and able to compete in the World Finals.
- A student must be enrolled in a degree program at the sponsoring institution with at least a half-time load. This rule is not to be construed as disqualifying co-op students, exchange students, or students serving internships.
- A student may compete for only one institution during a contest year.
- A student who has competed in two World Finals is not eligible to compete.
- A student who has competed in five Regional Contests is not eligible to compete. If a student has competed in the Qualifier for the Regional Contest but did not advance to the Regional Contest, this is not counted as a paricipation in the Regional Contest.
- Each competitor must satisfy at least one of the following:
  - be born not earlier than January 1, 1997;
  - start his/her first post-secondary study not earlier than January 1, 2016;
  - have completed no more than 8 complete semesters of full-time study (ICPC Manager verification required).
In the event of qualifying to advance to the World Finals, competitors must be prepared to provide a history of work and educational experience including a transcript to substantiate eligibility.
In case of organizational or technical impossibility to provide participation of all teams that applied, the Regional Contest Director of the Regional Contest has the right to institute additional requirements towards the Regional Contest participants, provided that it is approved by the Northern Eurasia Regional Contests Director.
Winners of Regional Contests and other teams are admitted to participate in the Northern Eurasia Finals according to Teams Selection Regulations approved by the Board of directors of the Northern Eurasia Regional Contests.

Procedure of organization and conducting of the Contest

The Contest round is five hours long. During the round each team is provided with one personal computer and a set of problems. At least eight problems and at most fourteen problems are proposed.
During the Contest, contestants solve the proposed problems. A solution to a problem is a program written in one of the supported programming languages. Contestants may solve different problems using different supported programming languages.
Contestants may bring and use unannotated natural language dictionaries (non electronic), blank sheets of paper and instruments for writing only. Contestants can use their Team Reference Document (TRD) that was submitted in advance during registration. Contestants may not bring or use any books (except dictionaries), other reference manuals, electronic dictionaries, program listings, any machine-readable information (software or data on any kind of storage), computing devices (handhelds, portable PCs, notebooks, calculators, smart watches), mobile phones, or any other communication devices.
During the competition, contestants may communicate to members of their team, members of the Executive Committee of the Jury, the Technical Committee, and the Support Staff only.
All computers are be turned on before the beginning of the Contest. During the Contest each team is provided with an envelope containing problem statements (3 copies), limits and evaluation environment, and the problem statements errata and clarifications (if any). The envelope is placed under the keyboard.
Contestants may not touch the computer or problem statements before the beginning of the Contest. The Contest begins after the notification THE CONTEST IS STARTED.
Contestants may use network printer during the Contest. Support Staff delivers printouts to the teams.
In case of any issues with the computers, printers, or anything else contestants should ask the Support Staff for help.

Computer Configuration

Each team is supplied with one modern computer with installed operating system Windows 10 or newer, connected to the local network.
The following software is available to each team:
- Microsoft Visual Studio Express;
- GNU C++;
- Java SDK;
- Far Manager
- Eclipse JDT+CDT;
- Intellij IDEA;
- Code::Blocks
- CLion
- gViM
- Emacs
- Python
- PyPy
- Kotlin
Technical Committee holds right to install patches and updates of the listed software.
Login and password for the operating system are indicated in the Contestant Handbook.

Programming languages

A solution to a problem is a program written in one of the following programming languages:
- Java;
- C++;
- Python;
- Kotlin.
Jury doesn't guarantee that all problems can be solved using Python programming language.

The jury uses the following commands to compile solutions:

Compiler	Command Line
Visual C++	cl /O2 /EHs /TP <source file>
GNU C++ (MinGW)	g++ -O2 -Wl,--stack=67108864 -x c++ -std=c++17 <source file>
Java	javac <source file>
Python	no compilation
Kotlin	kotlinc <source file>

The jury uses the following commands to run solutions:

Language	Command Line
C++	<executable file>
Java	java -Xmx512M -Xss64M <class file>
Python	python <source file>
PyPy	pypy3 <source file>
Kotin	java -Xmx512M -Xss64M <class file>

Run evaluation

Solutions to problems that were submitted for judging are called runs. Immediately after submission of any run, the team may continue working on other problems.
The size of the file with the run may not exceed 256KB.
Each run is judged as accepted or rejected.
The run is evaluated by executing it on a secret set of tests, common for all participants. A run is accepted only if it gives correct answers to all tests.
Runs are not allowed to:
- access the network;
- perform any I/O except for opening, closing, reading, and writing of files and standard streams that are explicitly specified in the problem statement;
- attack system security;
- execute other programs and create new processes;
- change file system permissions;
- work with subdirectories;
- create or manipulate any GUI resources (windows, dialog boxes, etc.);
- work with external devices (sound, printer, etc.);
- do anything else that can stir the evaluating process and the Contest.
The Contest software uses different methods to reveal violations of the above restrictions.
Evaluation is performed automatically, that is why a program should respect formats of input and output described in the problem statement. If not explicitly stated otherwise, all input data are considered to be correct and satisfying all restrictions from the problem statement.
The memory limit is the maximum amount of memory that a run may utilize.
The time limit is the maximum execution time per test.
Time and memory limit for each problem is specified in problem statements. A run is not accepted if the program exceeds these limits.
As soon as the run is evaluated, a team receives a message with the evaluation results. This message will be shown on the screen. A team is informed whether the run is accepted or not. If the run is rejected the error type and the test number are indicated.
All tests cases are numbered from one. The first test cases in the test set are the sample tests from the problem statement ordered in the same way as in problem statement. The following tests are ordered with the idea to make easier test cases come before harder ones, although there are no guarantees.

The possible outcomes are listed in the following table.

Outcome	Test Number	Comment	Possible Reasons
Compilation error	No	Executable file was not created after compilation.	Syntax error in the program; wrong file extension or language specified.
Security violation	Yes	The program tried to violate the contest rules.	Error in the program; purposeful rules violation (the violating team is disqualified in this case).
Time limit exceeded	Yes	The program exceeds the time limit.	Inefficient solution; error in the program.
Memory limit exceeded	Yes	The program exceeds the memory limit.	Inefficient solution; error in the program.
Idleness limit exceeded	Yes	The program doesn't consume processor time for a long period.	not flushing output in interactive problem, waiting for input while output is still buffered; not printing end of line character after output in interactive problem; error in interactive problem protocol, waiting for input by mistake; error in the program.
Runtime error	Yes	The program terminates with non-zero exit code or throws an uncaught OS exception.	Runtime error; '`return (non-zero)`' statement in C++ main function; '`System.exit(non-zero)`' in Java; uncaught exception.
Wrong answer	Yes	The answer is not correct.	The algorithm is not correct. Output format is not correct; Error in program.
Accepted	No	Run is accepted.	Program is correct.

Note that there is no Presentation Error outcome, you get Wrong Answer if your output is not correctly formatted.
The possible outcomes in the table are listed in their order of priority. For example, if runtime error has occurred, then output is not checked.
Evaluation process may be stopped several minutes before the end of the Contest. All runs submitted after this moment will be evaluated just after the end of the Contest.
The Executive Committee of the Jury will publish all submitted runs after the end of the Contest.
The Executive Committee of the Jury will publish the official test set that was used to evaluate participants' solutions after the end of the Contest.

Clarification Requests

During the Contest the participants can make Clarification Requests on the problem statements. The clarification request must exactly identify the part of the problem statement that the team considers ambiguous together with the possible interpretations. The Jury encourages participants to use the sample input and output for resolving (apparent) ambiguities.
Clarification requests are accepted only in English. A team fills out a Clarification Request form in Contest software and submits it to the Jury.
When the Executive Committee of the Jury responds to the clarification request, the team receives their answer in the Contest software. If the clarification request is incorrect or the answer is clear from the problem description, the Jury answers No comments. If the Jury agrees that there is an ambiguity or error in the problem statement, a clarification may be issued to all teams.

Practice Session

During the practice session teams become familiar with the contest environment and the contest software solving sample problems (1–3 simple problems).
During the practice session teams may not store any source code anywhere except working directory.
During the practice session teams may not attach any devices to the computer or alter its hardware configuration.
The results of the practice session are not taken into consideration when determining the Contest standings. However, the Executive Committee of the Jury may disqualify participants from the Contest any team violating the contest rules during the practice session.

Scoring of a Contest

A team that has solved more problems is placed higher.
In case of equality in the number of solved problems, the team that has a smaller penalty time is placed higher.
In case of equality in the number of solved problems and the penalty time, the team that has submitted its last accepted run first, is placed higher.
The penalty time is the sum of the time consumed for each problem solved. The time consumed for a solved problem is the integer number of minutes elapsed from the beginning of the contest to the submittal of the accepted run plus 20 penalty minutes for every rejected run for that problem regardless of submittal time. There is no penalty time consumed for a problem that is not solved. There is no penalty time for rejected runs after the first accepted run. There is no penalty time for runs that failed to compile.
Scoring of the team is based only on the time of the first accepted run for each problem.

The results of the Contest

According to the standings, the Northern Eurasia Finals winner team is determined.
Top teams are awarded medals.
Teams finishing in the top four positions will be awarded Gold Medals. Those teams finishing fifth through eighth place will be awarded Silver Medals. Those teams finishing ninth through twelfth place will receive Bronze Medals.