Recently added problemsSaved problems

Categories DLC Contests Groups Teams Board

Solved Problem RankingStreak rankingDOJ Power ranking

Call for TasksLogin Register

Loading page...

Preparing the next screen and the freshest data.

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

© 2026 DOJ

All rights reserved

Status

Problem ID

User

Participant	Problem	Score	Usage	Language	Length	Time	Details
0000000000	histogram	100 / 100	Time: 1094 msMemory: 4.1 MB	C++20	1,074 B	3 months ago