Recently added problemsSaved problems

Categories DLC Contests Groups Teams Board

Solved Problem RankingStreak rankingDOJ Power ranking

Call for TasksLogin Register

DOJ

Community online judge with OI-style subtask scoring, Elo ratings, and Discord-backed certification.

Problems

Problems Categories

Community

Contests Ranking Board Notices Host an external contest Guide

Account

Login Register Judge Status

Policy

Terms of Service DLC Rules Privacy API documentation Language runtimes Contest rank rewards Rating and performance

© 2026 DOJ

All rights reserved

Revision history

데이터를 추가해주세요

Revision 2 (current)Resolved데이터를 추가해주세요Oct 14, 2026, 8:56 AM
Revision 1데이터를 추가해주세요guu · Oct 13, 2026, 5:36 PM