Problems
Arena
Not a Robot
Met a developer of solved.ac at an event hosted or sponsored by solved.ac with 20+ participants
Met a developer of solved.ac at an event hosted or sponsored by solved.ac with 20+ participants
555
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
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
1-Star Problem-solving Technician
Solve 1,000 problems
Solve 1,000 problems
1.6K
Professional Problem-solver
Solve 500 problems
Solve 500 problems
6.1K
Skilled Problem-solver
Solve 200 problems
Solve 200 problems
29K
Apprentice Problem-solver
Solve 100 problems
Solve 100 problems
63K
Beginner Problem-solver
Solve 50 problems
Solve 50 problems
100K
Newbie Problem-solver
Solve 10 problems
Solve 10 problems
145K
Christmas Gift (2022)
Earn at least 5 gifts from the Make a Tree event, 2022
Earn at least 5 gifts from the Make a Tree event, 2022
725
Level 10 Sprout
Solved problems for 1,024 days in a row
Solved problems for 1,024 days in a row
82
Summer Postcard Decoration: Top 1,000 (2022)
Achieved a rank of top 1,000 in the Summer Postcard Decoration event, 2022
Achieved a rank of top 1,000 in the Summer Postcard Decoration event, 2022
884
2 Solves
Celebrated the 2nd anniversary of solved.ac
Celebrated the 2nd anniversary of solved.ac
9.7K
Spend 2022 with BOJ
Solved 1 or more problems in Hello, BOJ 2022!
Solved 1 or more problems in Hello, BOJ 2022!
367
Spent 2021 with BOJ
Solved 1 or more problems in Good Bye, BOJ 2021!
Solved 1 or more problems in Good Bye, BOJ 2021!
644
Level 9 Sprout
Solved problems for 512 days in a row
Solved problems for 512 days in a row
545
Level 8 Sprout
Solved problems for 256 days in a row
Solved problems for 256 days in a row
1.5K
Level 7 Sprout
Solved problems for 128 days in a row
Solved problems for 128 days in a row
3.2K
Level 6 Sprout
Solved problems for 64 days in a row
Solved problems for 64 days in a row
6.3K
Level 5 Sprout
Solved problems for 32 days in a row
Solved problems for 32 days in a row
11K
Level 4 Sprout
Solved problems for 16 days in a row
Solved problems for 16 days in a row
18K