<?xml version="1.0" encoding="utf-8"?><!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.0 20120330//EN" "JATS-journalpublishing1.dtd"><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" article-type="article">
<front>
    <journal-meta>
        <journal-id journal-id-type="publisher-id">INFEDU</journal-id>
        <journal-title-group>
            <journal-title>Informatics in Education</journal-title>
        </journal-title-group>
        <issn pub-type="epub">1648-5831</issn>
        <issn pub-type="ppub">1648-5831</issn>
        <publisher>
            <publisher-name>VU</publisher-name>
        </publisher>
    </journal-meta>
    <article-meta>
                <article-id pub-id-type="publisher-id">INFE2020_3_16</article-id>
                        <article-id pub-id-type="doi">10.15388/infedu.2020.16</article-id>
                        <article-categories>
            <subj-group subj-group-type="heading">
                <subject>Article</subject>
            </subj-group>
        </article-categories>
                        <title-group>
            <article-title>Constructive Graph Tasks in Distant Contests</article-title>
        </title-group>
                        <contrib-group>
                                        <contrib contrib-type="author">
                                                <name>
                    <surname>CHUKHNOV</surname>
                    <given-names>Anton</given-names>
                </name>
                                <email xlink:href="mailto:septembreange@gmail.com">septembreange@gmail.com</email>
                                                <xref ref-type="aff" rid="j_INFEDU_aff_000"/>
                                            </contrib>
                        <aff id="j_INFEDU_aff_000">Saint Petersburg Electrotechnical University “LETI”, Saint Petersburg, Russia</aff>
                                                    <contrib contrib-type="author">
                                                <name>
                    <surname>MAYTARATTANAKHON</surname>
                    <given-names>Athit</given-names>
                </name>
                                <email xlink:href="mailto:seaay2499@gmail.com">seaay2499@gmail.com</email>
                                                <xref ref-type="aff" rid="j_INFEDU_aff_001"/>
                                            </contrib>
                        <aff id="j_INFEDU_aff_001">Saint Petersburg Electrotechnical University “LETI”, Saint Petersburg, Russia</aff>
                                                    <contrib contrib-type="author">
                                                <name>
                    <surname>POSOV</surname>
                    <given-names>Ilya</given-names>
                </name>
                                <email xlink:href="mailto:iposov@gmail.com">iposov@gmail.com</email>
                                                <xref ref-type="aff" rid="j_INFEDU_aff_002"/>
                                            </contrib>
                        <aff id="j_INFEDU_aff_002">Saint Petersburg Electrotechnical University “LETI”, Saint Petersburg, Russia
Saint Petersburg State University, Saint Petersburg, Russia</aff>
                                                    <contrib contrib-type="author">
                                                <name>
                    <surname>POZDNIAKOV</surname>
                    <given-names>Sergei</given-names>
                </name>
                                <email xlink:href="mailto:pozdnkov@gmail.com">pozdnkov@gmail.com</email>
                                                <xref ref-type="aff" rid="j_INFEDU_aff_003"/>
                                            </contrib>
                        <aff id="j_INFEDU_aff_003">Saint Petersburg Electrotechnical University “LETI”, Saint Petersburg, Russia</aff>
                                </contrib-group>
                                                                                                                                                                <volume>19</volume>
                                <issue>3</issue>
                                    <fpage>343</fpage>
                        <lpage>359</lpage>
                                <pub-date pub-type="epub">
                        <day>16</day>
                                    <month>09</month>
                        <year>2020</year>
        </pub-date>
                                <permissions>
                                    <copyright-year>2020</copyright-year>
                                    <copyright-holder>Vilnius University, ETH Zürich</copyright-holder>
                                    <license
                                    license-type="open-access"
                                            >
                <license-p>Open access article under the CC BY license.</license-p>
            </license>
                    </permissions>
                        <abstract>
                        <p>The paper discusses a certain type of competitions based on distance interaction of a participant with simulation models of concepts from discrete mathematics and computer science. One of them is the “Construct, Test, Explore” (CTE) competition, developed by the authors, the other is the Olympiad in Discrete Mathematics and Theoretical Informatics (DM&amp;TI). The tasks presented in this paper are generally devoted to the concept of a graph isomorphism. Most of the tasks are verified automatically.</p>
                    </abstract>
                <kwd-group>
            <label>Keywords</label>
                        <kwd>olympiad</kwd>
                        <kwd>computer science</kwd>
                        <kwd>discrete mathematics</kwd>
                        <kwd>electronic manipulator</kwd>
                        <kwd>CS competition</kwd>
                        <kwd>mathematical thinking</kwd>
                        <kwd>graphs</kwd>
                        <kwd>constructive tasks</kwd>
                    </kwd-group>
    </article-meta>
</front>
</article>
