Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

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  • Remote sioworkers sending invalid unpack request
    Open

    Difficulty 2/5 1-3 hours Newbie friendliness 65/100

    sio2project/oioioi#818 · 1 comment ·

    Maintainers usually reply within 1 day

  • Dev docker: make web healthcheck verify the server is actually running
    Open
    good first issue Small

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    sio2project/oioioi#814 ·

    Maintainers usually reply within 1 day

  • Sandboxed compilation hangs in proot on Apple Silicon (arm64 Docker) – all submissions end as CE
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 42/100

    sio2project/oioioi#811 ·

    Maintainers usually reply within 1 day

  • Expand the Quiz Module with More Question Types and Response Review
    Open

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    sio2project/oioioi#808 ·

    Maintainers usually reply within 1 day

  • User group admin: autocomplete suggestions show only username instead of full name
    Open
    good first issue Small

    Difficulty 3/5 1-2 days Newbie friendliness 72/100

    sio2project/oioioi#807 ·

    Maintainers usually reply within 1 day

  • Populating Task Archive
    Open
    good first issue

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    sio2project/oioioi#799 ·

    Maintainers usually reply within 1 day

  • Run eslint in CI on pull requests
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 48/100

    sio2project/oioioi#797 · 2 comments ·

    Maintainers usually reply within 1 day

  • Dependencies between tests
    Open

    Difficulty 3/5 1-2 days Newbie friendliness 52/100

    sio2project/oioioi#778 ·

    Maintainers usually reply within 1 day

  • Undefined SCSS variable
    Open
    bug good first issue

    Difficulty 2/5 1-3 hours Newbie friendliness 72/100

    sio2project/oioioi#759 · 2 comments ·

    Maintainers usually reply within 1 day

  • CSS/js caching problems
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 48/100

    sio2project/oioioi#758 · 1 comment ·

    Maintainers usually reply within 1 day

  • Build and publish docker image fails due to pnpm problems
    Open

    Difficulty 2/5 1-3 hours Newbie friendliness 57/100

    sio2project/oioioi#751 · 1 comment ·

    Maintainers usually reply within 1 day

  • CSS is very broken after update to bootstrap 5
    Open
    good first issue

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    sio2project/oioioi#741 · 22 comments ·

    Maintainers usually reply within 1 day

  • Replace bootstrap-3-typeahead with a different typeahead provider
    Open
    Large

    Difficulty 4/5 1-2 days Newbie friendliness 48/100

    sio2project/oioioi#718 · 1 comment ·

    Maintainers usually reply within 1 day

  • Tests currently do not check for javascript failures at all
    Open
    good first issue Medium

    Difficulty 3/5 1-2 days Newbie friendliness 54/100

    sio2project/oioioi#717 · 1 comment ·

    Maintainers usually reply within 1 day

  • Bulk add problems from a contest to a round (teacher accounts)
    May be free again @sylwia-sapkowska claimed this 169 days ago, and no pull request is open. Open
    enhancement XLarge

    sio2project/oioioi#714 · 1 reaction · 1 assignee ·

    Maintainers usually reply within 1 day

  • Usergroup rankings remain after deletion of the usergroup
    Open

    Difficulty 2/5 1-3 hours Newbie friendliness 64/100

    sio2project/oioioi#713 ·

    Maintainers usually reply within 1 day

  • Create more teacher contest controllers and allow teachers to choose from them
    Open

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    sio2project/oioioi#703 ·

    Maintainers usually reply within 1 day

  • Uncluttering submission report view
    Open
    good first issue Medium

    Difficulty 3/5 1-2 days Newbie friendliness 48/100

    sio2project/oioioi#663 · 1 comment ·

    Maintainers usually reply within 1 day

  • Depracated version of jQuery
    May be free again @kama-pa-go claimed this 146 days ago, and no pull request is open. Open
    Small

    sio2project/oioioi#648 · 1 comment · 1 assignee ·

    Maintainers usually reply within 1 day

  • Expose samples in api
    May be free again @Arapak claimed this 279 days ago, and no pull request is open. Open

    sio2project/oioioi#608 · 1 assignee ·

    Maintainers usually reply within 1 day

  • Add an option to enable upsolving in a given contest
    Open
    Large

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    sio2project/oioioi#590 ·

    Maintainers usually reply within 1 day

  • Can't delete a task package added in a contest
    Open

    Difficulty 3/5 1-2 days Newbie friendliness 48/100

    sio2project/oioioi#563 ·

    Maintainers usually reply within 1 day

  • Add configuration option to run a problem in real-time/sio2jail
    May be free again @jtkolinski claimed this 188 days ago, and no pull request is open. Open
    Large

    sio2project/oioioi#522 · 1 assignee ·

    Maintainers usually reply within 1 day

  • Editorials viewable from contests
    Open
    Medium

    Difficulty 3/5 1-2 days Newbie friendliness 48/100

    sio2project/oioioi#515 ·

    Maintainers usually reply within 1 day

  • Base editorial implementation
    May be free again A pull request for this issue was closed without being merged. Open
    Medium

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    sio2project/oioioi#514 ·

    Maintainers usually reply within 1 day

  • Add a moving icon when waiting for a submission to be judged
    Open
    Large

    Difficulty 3/5 1-2 days Newbie friendliness 45/100

    sio2project/oioioi#509 · 6 comments ·

    Maintainers usually reply within 1 day

  • Inconsistencies in Contest Pupils Management
    Open
    enhancement XLarge

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    sio2project/oioioi#484 ·

    Maintainers usually reply within 1 day

  • Remove function can_register and replacing it with registration_status
    Open
    Large

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    sio2project/oioioi#463 · 2 comments ·

    Maintainers usually reply within 1 day

  • A use for difficulty tag proposals.
    Open
    XLarge

    Difficulty 5/5 Over a week Newbie friendliness 20/100

    sio2project/oioioi#460 · 1 comment ·

    Maintainers usually reply within 1 day

  • Large contests in the task archive load slowly
    Open
    frontend Medium SQL

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    sio2project/oioioi#441 · 1 comment ·

    Maintainers usually reply within 1 day

  • Resolve warnings during tests
    May be free again @m4teuk claimed this 146 days ago, and no pull request is open. Open

    sio2project/oioioi#435 · 4 comments · 1 assignee ·

    Maintainers usually reply within 1 day

  • Feature Request: Add an "Editorial" Feature for Problem Solutions
    Open
    Large

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    sio2project/oioioi#424 · 3 comments ·

    Maintainers usually reply within 1 day

  • API for standings, problems, submissions and account verification
    Open
    Large

    Difficulty 5/5 Over a week Newbie friendliness 20/100

    sio2project/oioioi#414 · 3 comments ·

    Maintainers usually reply within 1 day

  • Display a nice page when registration is not available
    May be free again @sylwia-sapkowska claimed this 153 days ago, and no pull request is open. Open
    Small

    sio2project/oioioi#409 · 3 comments · 1 assignee ·

    Maintainers usually reply within 1 day

  • Non-contest package upload view unavailable
    Open
    Large

    Difficulty 2/5 1-3 hours Newbie friendliness 48/100

    sio2project/oioioi#389 ·

    Maintainers usually reply within 1 day

  • [Submission View] Display how many points a contestant gained by submitting this solution
    May be free again A pull request for this issue was closed without being merged. Open
    enhancement Large

    Difficulty 2/5 1-3 hours Newbie friendliness 35/100

    sio2project/oioioi#350 · 1 comment ·

    Maintainers usually reply within 1 day

  • Add a way to see changes to submissions after task rejudge
    Open
    enhancement XLarge

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    sio2project/oioioi#330 ·

    Maintainers usually reply within 1 day

  • Exportszu: exported submissions don't contain mail submissions
    Open
    enhancement Large

    Difficulty 4/5 3-5 days Newbie friendliness 38/100

    sio2project/oioioi#313 · 1 comment ·

    Maintainers usually reply within 1 day

  • Better urls in the task archive
    Open
    enhancement XLarge

    Difficulty 3/5 1-2 days Newbie friendliness 48/100

    sio2project/oioioi#299 · 3 comments ·

    Maintainers usually reply within 1 day

  • Support for S3 storage backend
    May be free again @MasloMaslane claimed this 886 days ago, and no pull request is open. Open
    XLarge

    sio2project/oioioi#276 · 7 comments · 1 reaction · 1 assignee ·

    Maintainers usually reply within 1 day

  • Python compiler problems
    Open

    Difficulty 3/5 1-2 days Newbie friendliness 30/100

    sio2project/oioioi#272 · 1 comment ·

    Maintainers usually reply within 1 day

  • Use other contest as a template
    Open
    enhancement python XLarge

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    sio2project/oioioi#269 · 3 comments ·

    Maintainers usually reply within 1 day

  • Interactive tutorial
    Open
    enhancement javascript XLarge

    Difficulty 3/5 1-2 days Newbie friendliness 38/100

    sio2project/oioioi#225 · 1 comment · 2 reactions ·

    Maintainers usually reply within 1 day

  • Virtual participation in old OI/PA rounds
    Open
    enhancement python XLarge

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    sio2project/oioioi#224 · 1 comment ·

    Maintainers usually reply within 1 day

  • Editorial linked to the ProblemInstance
    Open
    enhancement javascript Large python

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    sio2project/oioioi#223 ·

    Maintainers usually reply within 1 day

  • Simple cheating detection
    Open
    enhancement python XLarge

    Difficulty 5/5 Over a week Newbie friendliness 18/100

    sio2project/oioioi#222 · 4 comments ·

    Maintainers usually reply within 1 day

  • Autocomplete search fields to add
    Open
    Small

    Difficulty 2/5 1-3 hours Newbie friendliness 48/100

    sio2project/oioioi#206 · 1 comment ·

    Maintainers usually reply within 1 day

  • Update and verify documentation for Django apps
    Open
    XLarge

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    sio2project/oioioi#193 · 2 comments ·

    Maintainers usually reply within 1 day

  • Update Bootstrap to v5
    May be free again @malevitzch claimed this 167 days ago, and no pull request is open. Open
    XLarge

    sio2project/oioioi#183 · 1 assignee ·

    Maintainers usually reply within 1 day

  • Add a user interface for managing groups of students in teachers' dashboard
    Open
    Large

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    sio2project/oioioi#178 · 1 comment ·

    Maintainers usually reply within 1 day

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