Recently added problemsSaved problemsWorkbooks

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 account linking.

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

hlu

Newbie

No organizationSince October 12, 2026

External accounts

AtCoderhlu Discordhlu

hlu's authored problems Submission history

Lemon Cup

그림 ·woohyunjngEmoji ·Twitter

Current rating

890

+393

Peak 890 · Top 28.0%

TRAINEE IV26.67 Power

Solved problems

Titles

No equipped titles

Equipped gear

BackgroundLemon Cup 0

LaptopStarter Laptop 0

local_fire_departmentStreak

Current 0 days

Past year 2026

SMTWTFS

Rating history

= 497 (+497), NewbieRank: 67DOJ Beginner Contest 15Nov 1, 2026, 10:00 AM = 890 (+393), NewbieRank: 77DOJ Starter Contest 1Nov 4, 2026, 10:00 AM

NovDec2026FebMarAprMayJunJulAugSepOctNov

Longest solve streak: 1 days

1-23-56-910-14Freeze

Solve activity is counted from 06:00 in Korea time.

Participation history

2 total

DOJ Starter Contest 1Window

Nov 4, 2026, 10:00 AM

Score 700Rank 77

DOJ Beginner Contest 15Window

Nov 1, 2026, 10:00 AM

Score 500Rank 67