Real OI scoring
Subtask-based partial scoring instead of plain AC counts. Strategy, partials, and full solutions all show up in your score.
Fetching the next screen and preparing the latest data.
DOJ is an online judge built for olympiad-in-informatics students. Subtask scoring, regular rated rounds, a public ladder, and verified profiles all live in one place.
The next schedule will be announced in notices.
OI-style training, rated rounds, and a public record β connected end to end.
Subtask-based partial scoring instead of plain AC counts. Strategy, partials, and full solutions all show up in your score.
We run our own contests on a recurring schedule with ELO-based rating updates. Practice and competition stay on the same track.
Discord verification keeps the public ladder real. Your handle, tier, and solve history become your profile.
Public rating ladder, updated every time a rated round ends.
The invite-only OI community judge is now live. Please complete Discord certification to appear on public rankings.
Sign up, finish Discord verification, then enter rated rounds and earn a spot on the public ranking.
Upcoming and recently finished contests at a glance.