A yellow badge with a blue ribbon that seems to fit somewhere (2023) Solved a problem with ‘41’ in its ID, between 6:00 AM April 1, 2023 KST and 1:00 AM April 3, 2023 KST
1.2K
2022 shake! Participated in 2022 shake!, or solved 1 or more problems in its open contest
208
2023 Chung-Ang University CHAC Participated in 2023 Chung-Ang University CHAC, or achieved a score of over 10 in its open contest
341
The 1st hjroh Cup (2023) Solved 1 or more problems in the 1st hjroh Cup
255
Boardgame Cup (2023) Solved 1 or more problems in Boardgame Cup
584
Professional Problem-solver Solve 500 problems
5.7K
Skilled Problem-solver Solve 200 problems
28K
Apprentice Problem-solver Solve 100 problems
60K
Beginner Problem-solver Solve 50 problems
96K
Newbie Problem-solver Solve 10 problems
139K
Spent 2022 with BOJ Solved 1 or more problems in Good Bye, BOJ 2022!
606
Christmas Gift (2022) Earn at least 5 gifts from the Make a Tree event, 2022
725
2022 Seoul Cyber University Programming Contest Participated in 2022 Seoul Cyber University Programming Contest, or solved 1 or more problems in its open contest
339
Warmth in the Snow (2022) Solved 1 or more problems in the Invitation of the Winter Forest
462
Level 8 Sprout Solved problems for 256 days in a row
1.4K
Level 7 Sprout Solved problems for 128 days in a row
3K
Level 6 Sprout Solved problems for 64 days in a row
5.9K
Level 5 Sprout Solved problems for 32 days in a row
10K
Level 4 Sprout Solved problems for 16 days in a row
17K
Level 3 Sprout Solved problems for 8 days in a row