DOJ logoDOJ
Problems
Recently added problemsSaved problemsWorkbooks
CategoriesDLCContestsGroupsTeamsBoard
Ranking
Solved Problem RankingStreak rankingDOJ Power ranking
Status
Call for TasksLoginRegister
DOJ logoDOJ

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

Problems
ProblemsCategories
Community
ContestsRankingBoardNoticesHost an external contestGuide
Account
LoginRegisterJudge Status
Policy
Terms of ServiceDLC RulesPrivacyAPI documentationLanguage runtimesContest rank rewardsRating and performance
© 2026 DOJ
All rights reserved
arrow_backBack to workbooks

장송의 프리렌

2 problems9999min

Virtual participation

Start practice

Scoreboard

Standings
#ProblemDifficultyAcceptanceSolvedStatus
A레몬향의 마흐트machtDiamond III
75%
8—
B고속 프리렌 변환fftPlatinum IV
39%
10—