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LLMOJ Wiki

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LLMOJ is an online judge based on LibreOJ, with AI tools for problem setting. New here? Start with Installation. To find a particular setting, see the Configuration overview.

Installing and maintaining

Page	Contents
Installation	Installation scripts, every option, and retrying a failed installation
Upgrade	Upgrading while keeping configuration and data; compatibility and rollback
Feature upgrades	The database changes of LLMOJ's features, and applying them to a custom installation
HTTPS	Domains, TLS certificates and external reverse proxies
Docker sources	Docker package sources and registry mirrors
Operations	Nginx, MariaDB, Redis, MinIO and systemd after installation; backups and counts

Using LLMOJ

Page	Contents
Contest rules	Scoring and feedback in NOI / OI, IOI, ICPC and Strict IOI contests
Teams	Private teams: joining by ID, reviews, groups and shared resources
Solutions	Solutions on problem pages, My discussions and AI solutions
Submissions	Submission previews, test data versions and earlier results
Hacks	Hacking submissions, the problem STD and hack results
Self Eval	Hidden pretests in NOI / OI contests and their quota
Fake moderation	Voiding cheating submissions while keeping the evidence
Registration approval	Registration settings and delegated reviews
Two-factor sign-in	Authenticator apps, passkeys, recovery codes and confirming sensitive changes

The member list (/u) opens from View all in the Top Users panel on the home page, for users with the ViewUsers privilege.

Judging

Page	Contents
Distributed judging	Architecture, the judge queue, draining and revoking judge machines
Remote judges	Setting up a separate judge machine and checking it
Judge configuration	Judge settings, the sandbox and its self-test, capacity and resizing

AI

Page	Contents
AI	Each user's models and search services, permissions, AI jobs, and the site's AI pause and limits
AI environment	AI directories, the local sandbox connection, keys and environment variables

Reference

Page	Contents
Configuration overview	Where each setting lives
Backend configuration	Backend settings: accounts, security, database, mail, storage, contests and display
Frontend configuration	Building the frontend locally; optional CDN settings
Environment	Environment variables for running, installing and building; maintenance scripts
Publishing	Applying updates with GitHub Desktop, publishing this wiki, and releases

A full installation (--role all) runs the website, storage and a local judge, and can use remote judge machines too. A website-only installation (--role web) builds no local judging environment; remote judges handle submissions, but AI validation and test data generation need the local environment of a full installation.

LLMOJ is tested on Ubuntu 24.04 amd64. Its own code is under the MIT license; upstream components keep their licenses.