Problems
Arena
Level 1 Sprout
Solved problems for 2 days in a row
Solved problems for 2 days in a row
121K
Level 2 Sprout
Solved problems for 4 days in a row
Solved problems for 4 days in a row
76K
Level 3 Sprout
Solved problems for 8 days in a row
Solved problems for 8 days in a row
35K
Level 4 Sprout
Solved problems for 16 days in a row
Solved problems for 16 days in a row
19K
Level 5 Sprout
Solved problems for 32 days in a row
Solved problems for 32 days in a row
11K
9500-card (2022)
Achieved 9,500 points in the Solved Blackjack Event, 2022
Achieved 9,500 points in the Solved Blackjack Event, 2022
435
SUAPC 2022s
Participated in SUAPC 2022 Summer, or solved 1 or more problems in its open contest
Participated in SUAPC 2022 Summer, or solved 1 or more problems in its open contest
272
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
2022 1st Calculus, Probability, and Statistics Cup
Solved 1 or more problems in the 2022 1st Calculus, Probability, and Statistics Cup
Solved 1 or more problems in the 2022 1st Calculus, Probability, and Statistics Cup
359
Spent 2022 with BOJ
Solved 1 or more problems in Good Bye, BOJ 2022!
Solved 1 or more problems in Good Bye, BOJ 2022!
606
SciOI 2022
Participated in SciOI 2022, or solved 1 or more problems in its open contest
Participated in SciOI 2022, or solved 1 or more problems in its open contest
226
Newbie Problem-solver
Solve 10 problems
Solve 10 problems
148K
Beginner Problem-solver
Solve 50 problems
Solve 50 problems
103K
Apprentice Problem-solver
Solve 100 problems
Solve 100 problems
65K
Skilled Problem-solver
Solve 200 problems
Solve 200 problems
30K
Boardgame Cup (2023)
Solved 1 or more problems in Boardgame Cup
Solved 1 or more problems in Boardgame Cup
584
Spend 2023 with BOJ
Solved 1 or more problems in Hello, BOJ 2023!
Solved 1 or more problems in Hello, BOJ 2023!
290
2023 ICPC Sinchon Winter Algorithm Camp Contest
Participated in 2023 ICPC Sinchon Winter Algorithm Camp Contest, or solved 1 or more problems in its open contest
Participated in 2023 ICPC Sinchon Winter Algorithm Camp Contest, or solved 1 or more problems in its open contest
325
Guardian of Balance - Bronze
Of the 8 tags displayed on the profile, achieve a rating of over 30 for 4 or more tags
Of the 8 tags displayed on the profile, achieve a rating of over 30 for 4 or more tags
103K
Master of Balance - Bronze
Of the 8 tags displayed on the profile, achieve a rating of over 30 for 6 or more tags
Of the 8 tags displayed on the profile, achieve a rating of over 30 for 6 or more tags
77K