Problems
Arena
Professional Problem-solver
Solve 500 problems
Solve 500 problems
5.6K
Skilled Problem-solver
Solve 200 problems
Solve 200 problems
27K
Apprentice Problem-solver
Solve 100 problems
Solve 100 problems
58K
Beginner Problem-solver
Solve 50 problems
Solve 50 problems
94K
Newbie Problem-solver
Solve 10 problems
Solve 10 problems
136K
GBS Coding Contest 2022
Participated in GBS Coding Contest 2022, or solved 1 or more problems in its open contest
Participated in GBS Coding Contest 2022, or solved 1 or more problems in its open contest
292
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
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
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
Warmth in the Snow (2022)
Solved 1 or more problems in the Invitation of the Winter Forest
Solved 1 or more problems in the Invitation of the Winter Forest
462
Sinchon Station (2022)
Participated in 2022 ICPC Sinchon Summer Algorithm Camp Contest, or solved 1 or more problems in its open contest
Participated in 2022 ICPC Sinchon Summer Algorithm Camp Contest, or solved 1 or more problems in its open contest
388
9500-card (2022)
Achieved 9,500 points in the Solved Blackjack Event, 2022
Achieved 9,500 points in the Solved Blackjack Event, 2022
435
9900-card (2022)
Achieved 9,900 points in the Solved Blackjack Event, 2022
Achieved 9,900 points in the Solved Blackjack Event, 2022
191
Level 9 Sprout
Solved problems for 512 days in a row
Solved problems for 512 days in a row
462
Level 8 Sprout
Solved problems for 256 days in a row
Solved problems for 256 days in a row
1.3K
Level 7 Sprout
Solved problems for 128 days in a row
Solved problems for 128 days in a row
2.9K
Level 6 Sprout
Solved problems for 64 days in a row
Solved problems for 64 days in a row
5.7K
Level 5 Sprout
Solved problems for 32 days in a row
Solved problems for 32 days in a row
9.9K
Level 4 Sprout
Solved problems for 16 days in a row
Solved problems for 16 days in a row
17K
Level 3 Sprout
Solved problems for 8 days in a row
Solved problems for 8 days in a row
32K