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OLYMPIADS IN INFORMATICS
International Journal

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Contents
Volume 9 (2015)
Volume 8 (2014)
Volume 7 (2013)
Volume 6 (2012)
Volume 5 (2011)
Volume 4 (2010)
Volume 3 (2009)
Volume 2 (2008)
Volume 1 (2007)
Author Index
Papers in Production

OLYMPIADS IN INFORMATICS

ISSN 1822-7732 (Print), 2335-8955 (Online)

Contents

Volume 8 (2014)

Foreword (1-2)

Tim BELL, Caitlin DUNCAN, Sam JARMAN, Heidi NEWTON
Presenting Computer Science Concepts to High School Students (3-19)
Sébastien COMBÉFIS, Jérémy WAUTELET
Programming Trainings and Informatics Teaching Through Online Contests (21-34)
Gilberto CUBA-RICARDO, P. Alberto LEYVA-FIGUEREDO, Laura L. MENDOZA-TAULER
Learning Strategies of Informatics Contestants (35-48)
Valentina DAGIENE, Ela ZUR, Tamar BENAYA
International Olympiad in Informatics: Team Selection, Training, and Statistics - The Tale of Two Countries (49-61)
Michael DOLINSKY
Technology for the Development of Thinking of Preschool Children and Primary School Pupils (63-68)
Jordan FERNANDO, M. M. Inggriani LIEM
Components and Architectural Design of an Autograder System Family (69-79)
David GINAT
On Inductive Progress in Algorithmic Problem Solving (81-91)
Erkki KAILA, Teemu RAJALA, Mikko-Jussi LAAKSO, Rolf LINDÉN,
Einari KURVINEN, Tapio SALAKOSKI
Utilizing an Exercise-Based Learning Tool Effectively in Computer Science Courses (93-109)
Vladimir M. KIRYUKHIN, Marina S. TSVETKOVA
The Approach of Early Olympiad Preparation "Olympic Lift" (111-122)
Stefano MAGGIOLO, Giovanni MASCELLANI, Luca WEHRSTEDT
CMS: a Growing Grading System (123-131)
Marija MIHOVA, Natasha STOJKOVIKJ, Mile JOVANOV, Emil STANKOV
On Maximal Level Minimal Path Vectors of a Two-Terminal Network (133-144)
Pavel S. PANKOV, Kirill A. BARYSHNIKOV
Tasks in Informatics with Pre-Existing Algorithms (145-155)
Jakub RADOSZEWSKI
More Algorithms without Programming (157-168)
Luis Héctor CHÁVEZ, Alan GONZÁLEZ, Joemmanuel PONCE
omegaUp: Cloud-Based Contest Management System and Training Platform in the Mexican Olympiad in Informatics (169-178)
David CLARK, Mike CLAPPER
The Australian Informatics Competition (179-189)
Yugo K. ISAL, M.M. Inggriani LIEM, Adi MULYANTO, Brian MARSHAL
Indonesian Olympiad in Informatics: Significant Advancements between 2010 and 2014
(191-198)

Volume 7 (2013)

Foreword (1-2)
Sébastien COMBÉFIS, Virginie VAN den SCHRIECK, Alexis NOOTENS
Growing Algorithmic Thinking Through Interactive Problems to Encourage Learning Programming (3-13)
Michael DOLINSKY
An Approach to Teaching Introductory-Level Computer Programming (14-22)
Michal FORISEK
Pushing the Boundary of Programming Contests (23-35)
Steven HALIM
Expecting the Unexpected (36-41)
Mile JOVANOV, Bojan KOSTADINOV, Emil STANKOV, Marija MIHOVA, Marjan GUSEV
State Competitions in Informatics and the Supporting Online Learning and Contest Management System with Collaboration and Personalization Features MENDO (42-54)
Martin MARES
Computer Maintenance via Batch Execution (55-60)
Minko MARKOV, Krassimir MANEV
Algorithmic Results on a Novel Computational Problem (61-77)
Martins OPMANIS
Latvian Olympiad in Informatics - Lessons Learned (78-89)
Jakub PACHOCKI, Jakub RADOSZEWSKI
Where to Use and How not to Use Polynomial String Hashing (90-100)
Pavel S. PANKOV
Tasks in Informatics of Continuous Content (101-112)
SIMON
Olympiads in Informatics - the Journal's First Six Years (113-122)
Emil STANKOV, Mile JOVANOV, Aleksandar BOJCHEVSKI, Ana MADEVSKA BOGDANOVA
EMAx: Software for C++ Source Code Analysis (123-131)
Willem van der VEGT
Predicting the Difficulty Level of a Bebras Task (132-139)
Tom VERHOEFF
Informatics Everywhere: Information and Computation in Society, Science, and Technology (140-152)
Artem IGLIKOV, Zaza GAMEZARDASHVILI, Bakhyt MATKARIMOV
REPORTSInternational Olympiads in Informatics in Kazakhstan (153-162)
Muhammad KAYKOBAD
Bangladesh Olympiads in Informatics (163-167)
George MANDARIA
Olympiads in Informatics: the Georgian Experience (168-174)
Madhavan MUKUND
The Indian Computing Olympiad (175-179)
Qiyang ZHAO, Fan WANG, Baolin YIN, Hui SUN
Arbiter: the Evaluation Tool in the Contests of the China NOI (180-185)
REVIEWS, COMMENTS (186-197)

Volume 6 (2012)

Foreword (1-2)
Giorgio AUDRITO, G. Barbara DEMO, Elio GIOVANNETTI
The Role of Contests in Changing Informatics Education: A Local View (3-20)
Vladimír BOZA, Michal FORISEK
FCL-STL, a Generics-Based Template Library for FreePascal (21-30)
Sébastien COMBÉFIS, Vianney le CLÉMENT de SAINT-MARCQ
Teaching Programming and Algorithm Design with Pythia, a Web-Based Learning Platform (31-43)
David GINAT
Insight Tasks for Examining Student Illuminations (44-52)
Steven HALIM, Zi Chun KOH, Victor Bo Huai LOH, Felix HALIM
Learning Algorithms with Unified and Interactive Web-Based Visualization (53-68)
Mathias HIRON, Loïc FÉVRIER
A Self-Paced Learning Platform to Teach Programming and Algorithms (69-85)
Stefano MAGGIOLO,, Giovanni MASCELLANI
Introducing CMS: A Contest Management System (86-99)
Martin MARES, Bernard BLACKHAM
A New Contest Sandbox (100-109)
Pavel S. PANKOV, Kirill A. BARYSHNIKOV
Tasks of a Priori Unbounded Complexity (110-114)
Noa RAGONIS
Type of Questions - The Case of Computer Science (115-132)
Francisco ALMEIDA, Vicente BLANCO PÉREZ, Javier CUENCA, Ricardo FERNÁNDEZ-PASCUAL, Ginés GARCÍA-MATEOS, Domingo GIMÉNEZ, José GUILLÉN, Juan Alejandro PALOMINO BENITO, María-Eugenia REQUENA, José RANILLA
REPORTSAn Experience on the Organization of the First Spanish Parallel Programming Contest (133-147)
Francis DOGBEY
Learning Computer Programming as an Extra Curriculum Activity, the Challenges (148-157)
Aleksandar ILIC, Andreja ILIC
IOI Training and Serbian Competitions in Informatics (158-169)
Jyldyz R. JANALIEVA
Conducting Off-Line Informatics Olympiads with Individual Tasks (170-177)
Emil KELEVEDJIEV, Zornitsa DZHENKOVA
Competitions' Tasks in Informatics for the ``Pre-Master'' Group of School Students (178-191)
Plamen NEDKOV
Young Talent in Informatics \normalsizePreliminary Findings of an IOI Survey Launched by AICA in Cooperation with IT STAR (192-198)
Peter TAYLOR
Comparisons of the IMO and IOI (199-204)
Jelko URBANCIC, Mitja TRAMPUS
Putka - A Web Application in Support of Computer Programming Education (205-211)
Willem van der VEGT
Theoretical Tasks on Algorithms; Two Small Examples (212-217)
Ela ZUR, Tamar BENAYA, Oren BECKER, David GINAT
Israel: The Regional Competition and Teacher Involvement (218-225)
REVIEWS, COMMENTS (226-231)

Volume 5 (2011)

Foreword (1-2)
David GINAT
Algorithmic Problem Solving and Novel Associations (3-11)
Lasse HAKULINEN
Survey on Informatics Competitions: Developing Tasks (12-25)
Kentaro IMAJO
Contest Environment Using Wireless Networks: A Case Study from Japan (26-31)
Grzegorz JAKACKI, Marcin KUBICA, Tomasz WALEN
Codility. Application of Olympiad-Style Code Assessment to Pre-Hire Screening of Programmers (32-43)
Vladimir M. KIRYUKHIN, Marina S. TSVETKOVA
Preparing for the IOI through Developmental Teaching (44-57)
Dennis KOMM
Teaching the Concept of Online Algorithms (58-71)
Tomasz KULCZYNSKI, Jakub LACKI, Jakub RADOSZEWSKI
Stimulating Students' Creativity with Tasks Solved Using Precomputation and VisualizationThe authors thank an anonymous referee for helpful suggestions on the presentation of the paper. (71-81)
Krassimir MANEV, Nikolai NIKOLOV, Minko MARKOV
Reconstruction of Trees Using Metric Properties (82-91)
Martin MARES
Fairness of Time Constraints (92-102)
Bruce MERRY, Carl HULTQUIST
Measuring the Startup Time of a Java Virtual Machine (103-112)
Pavel S. PANKOV, Kirill A. BARYSHNIKOV
Tasks of ``Mission Impossible'' and ``Mission Impeded'' Types (113-119)
Tom VERHOEFF
Beyond the Competitive Aspect of the IOI: It Is All about Caring for Talent (120-127)
Arturo CEPEDA, Margarita GARCIA
Mexican Olympiad in Informatics (128-130)
Sébastien COMBÉFIS, Damien LEROY
Belgian Olympiads in Informatics: The Story of Launching a National Contest (131-139)
Mario ITALIANI
Italian Olympiad in Informatics: 10 Years of the Selection and Education Process (140-146)
Jari KOIVISTO
The National Computer Olympiads and the IOI Participation in Finland (147-149)
Kanchit MALAIVONGS
Preparing Students for IOI: Thailand Country Report (150-154)
Pavel S. PANKOV, Timur R. ORUSKULOV
Kyrgyzstan National Report on Olympiads in Informatics (155-160)
Ela ZUR, Tamar BENAYA, Oren BECKER, David GINAT
Israel: The Regional and National Competitions (161-168)
REVIEWS, COMMENTS (169-175)

Volume 4 (2010)

Editors
Foreword (1)
Benjamin A. BURTON
Encouraging Algorithmic Thinking Without a Computer (3-14)
Vladimir M. KIRYUKHIN
Mutual Influence of the National Educational Standard and Olympiad in Informatics Contents (15-29)
Vladimir M. KIRYUKHIN, Marina S. TSVETKOVA
Strategy for ICT Skills Teachers and Informatics Olympiad Coaches Development (30-51)
Marcin KUBICA, Jakub RADOSZEWSKI
Algorithms without Programming (52-66)
Ilham W. KURNIA, Brian MARSHAL
Indonesian Olympiad in Informatics (67-75)
Krassimir MANEV, Biserka YOVCHEVA, Milko YANKOV, Petar PETROV
Testing of Programs with Random Generated Test Cases (76-86)
Bruce MERRY
Performance Analysis of Sandboxes for Reactive Tasks (87-94)
Pavel S. PANKOV
Real Processes as Sources for Tasks in Informatics (95-103)
Margot PHILLIPPS
The New Zealand Experience of Finding Informatics Talent (104-112)
Tocho TOCHEV, Tsvetan BOGDANOV
Validating the Security and Stability of the Grader for a Programming Contest System (113-119)
Marina S. TSVETKOVA
The Olympiads in Informatics as a Part of the State Program of School Informatization in Russia (120-133)
Tom VERHOEFF
An Enticing Environment for Programming (134-141)
Hong WANG, Baolin YIN, Rujia LIU, Wenbin TANG, Weidong HU
Selection Mechanism and Task Creation of Chinese National Olympiad in Informatics (142-150)
Ela ZUR, Tamar BENAYA, David GINAT
IOI Israel - Team Selection, Training, and Statistics (151-157)
Wolfgang POHL, Benjamin A. BURTON, Valentina DAGIENE, Bronius SKUPAS, Jittat FAKCHAROENPHOL, Michal FORISEK, Mathias HIRON, Martins OPMANIS, Willem van der VEGT
Get Involved! The IOI Workshop 2010, Its Goals and Results (158-169)

Volume 3 (2009)

Foreword (1-2)
Michal FORISEK
Using Item Response Theory to Rate (not only) Programmers (3-16)
Abdulrahman IDLBI
Taking Kids into Programming (Contests) with Scratch (17-25)
Emil KELEVEDJIEV, Zornitsa DZHENKOVA
Tasks and Training the Intermediate Age Students for Informatics Competitions (26-37)
Rob KOLSTAD
Infrastructure for Contest Task Development (38-59)
Martin MARES
Moe - Design of a Modular Grading System (60-66)
Bruce MERRY
Using a Linux Security Module for Contest Security (67-73)
Ilia NINKA
The Role of Reactive and Game Tasks in Competitions (74-79)
Martins OPMANIS
Team Competition in Mathematics and Informatics ``Ugale'' - Finding New Task Types (80-100)
Pavel S. PANKOV, Kirill A. BARYSHNIKOV
Representational Means for Tasks in Informatics (101-112)
Timo PORANEN, Valentina DAGIENE, Åsmund ELDHUSET, Heikki HYYRÖ, Marcin KUBICA, Antti LAAKSONEN, Martins OPMANIS, Wolfgang POHL, Jurate SKUPIENE, Pär SÖDERHJELM, Ahto TRUU
Baltic Olympiads in Informatics: Challenges for Training Together (112-131)
Pedro RIBEIRO, Pedro GUERREIRO
Improving the Automatic Evaluation of Problem Solutions in Programming Contests (132-143)
Willem van der VEGT
Using Subtasks (144-148)
Tom VERHOEFF
20 Years of IOI Competition Tasks (149-166)
Biserka YOVCHEVA, Galina MOMCHEVA, Petar PETROV
jBOI - One More Possibility for Increasing the Number of Competitors in Informatics (167-173)

Volume 2 (2008)

Foreword (3-4)
Benjamin A. BURTON
Breaking the Routine: Events to Complement Informatics Olympiad Training (5-15)
Benjamin A. BURTON, Mathias HIRON
Creating Informatics Olympiad Tasks: Exploring the Black Art (16-36)
Emanuela CERCHEZ, Mugurel Ionut ANDREICA
Romanian National Olympiads in Informatics and Training (37-47)
Arthur CHARGUÉRAUD, Mathias HIRON
Teaching Algorithmics for Informatics Olympiads: The French Method (48-63)
Krzysztof DIKS, Marcin KUBICA, Jakub RADOSZEWSKI, Krzysztof STENCEL
A Proposal for a Task Preparation Process (64-74)
Emil KELEVEDJIEV, Zornitsa DZHENKOVA
Tasks and Training the Youngest Beginners for Informatics Competitions (75-89)
Krassimir MANEV
Tasks on Graphs (90-104)
Bruce MERRY, Marco GALLOTTA, Carl HULTQUIST
Challenges in Running a Computer Olympiad in South Africa (105-114)
Pavel S. PANKOV
Naturalness in Tasks for Olympiads in Informatics (115-121)
Wolfgang POHL
Manual Grading in an Informatics Contest (122-130)
Miguel A. REVILLA, Shahriar MANZOOR, Rujia LIU
Competitive Learning in Informatics: The UVa Online Judge Experience (131-148)
Pedro RIBEIRO, Pedro GUERREIRO
Early Introduction of Competitive Programming (149-162)
Seiichi TANI, Etsuro MORIYA
Japanese Olympiad in Informatics (163-170)
Ahto TRUU, Heno IVANOV
On Using Testing-Related Tasks in the IOI (171-180)
Troy VASIGA, Gordon CORMACK, Graeme KEMKES
What Do Olympiad Tasks Measure? (181-191)
Tom VERHOEFF
Programming Task Packages: Peach Exchange Format (192-207)

Volume 1 (2007)

Editorial (3-4)
Ricardo de Oliveira ANIDO, Raphael Marcos MENDERICO
Brazilian Olympiad in Informatics (5-14)
Predrag BRODANAC
Regular Competitions in Croatia (15-23)
Giorgio CASADEI, Bruno FADINI, Marta Genovie De VITA
Italian Olympiads in Informatics (24-30)
Lhaichin CHOIJOOVANCHIG, Sambuu UYANGA, Mendee DASHNYAM
The Informatics Olympiad in Mongolia (31-36)
Valentina DAGIENE, Jurate SKUPIENE
Contests in Programming: Quarter Century of Lithuanian Experience (37-49)
Krzysztof DIKS, Marcin KUBICA, Krzysztof STENCEL
Polish Olympiad in Informatics - 14 Years of Experience (50-56)
Michal FORISEK
Slovak IOI 2007 Team Selection and Preparation (57-65)
Metodija JANCESKI, Veno PACOVSKI
Olympiads in Informatics: Macedonian Experience, Needs, Challenges (66-78)
Graeme KEMKES, Gordon CORMACK, Ian MUNRO, Troy VASIGA
New Task Types at the Canadian Computing Competition (79-89)
Vladimir M. KIRYUKHIN
The Modern Contents of the Russian National Olympiads in Informatics (90-104)
Rob KOLSTAD, Don PIELE
USA Computing Olympiad (USACO) (105-111)
Krassimir MANEV, Emil KELEVEDJIEV, Stoyan KAPRALOV
Programming Contests for School Students in Bulgaria (112-123)
Martin MARES
Perspectives on Grading Systems (124-130)
Pavel S. PANKOV, Timur R. ORUSKULOV
Tasks at Kyrgyzstani Olympiads in Informatics: Experience and Proposals (131-140)
Wolfgang POHL
Computer Science Contests in Germany (141-148)
Pedro RIBEIRO, Pedro GUERREIRO
Increasing the Appeal of Programming Contests with Tasks Involving Graphical User Interfaces and Computer Graphics (149-164)
Hong WANG, Baolin YIN, Wenxin LI
Development and Exploration of Chinese National Olympiad in Informatics (CNOI) (165-174)
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