Problems
Arena
Season 2020 — Platinum I
Condition Reached Platinum I in Season 2020141
Standard Library
Celebrated the 1st anniversary of solved.ac
Condition Solved previously unsolved problem at between May 31st, 2021 00:00 and June 8th, 2021 00:00 (KST)5K
30 Days of Sincerity
Condition Achieve max streak of 30 days12K
Pocky Day 2021
Solved a problem in Pocky day 2021
Condition Solved previously unsolved problem at between November 11th, 2021 06:00 and November 12th, 2021 06:00 (KST)3.3K
Merry Christmas 2021
Solved a problem in Christmas or Christmas Eve 2021
Condition Solve 1 or more previously unsolved problems between 6:00 AM on December 24, 2021 and 6:00 AM on December 26, 20213.5K
Good Bye, BOJ 2021!
Good Bye, 2021!
Condition Solved 1 or more problems in Good Bye, BOJ 2021!646
God's Queries on This Wonderful Arrays!
Seeing that the value written in the Nth sequence in front of your house changes every day, you became angry and decided to sue Hanbyeol.
Condition Solve 1 or more problems which has '수열' or '쿼리' in its Korean version of the title, at some point after March 22, 20226.2K
Green Matrix Grid: Dark Mode
More epic green matrix grid
Condition (Hidden)9.6K
Real Final Ghudegy Cup 2 2
Please make a poster 2 (I won't)
Condition Solved uncountable problem in Real Final Ghudegy Cup 2 2754
If you need more burgers or coke, please feel free to ask our staff 2
We will eat burgers if you ask us 2
Condition Solved uncountable problem in Real Final Ghudegy Cup 2 2754
Magician of the Library
Celebrated the 2nd anniversary of solved.ac
Condition Solve 1 or more previously unsolved problems between 6:00 AM on May 30, 2022 and 6:00 AM on June 6, 20229.7K
Season 2021 — Diamond III
Condition Reached Diamond III in Season 202194
Good Game Well Played
Competitive programming is a game. The Semi-Game Cup is a CP competition. The Semi-Game Cup is therefore a game competition.
Condition Solved 1 or more problems in Semi-Game Cup 3171
IOI 2022 Indonesia
Condition Participated in the Cheering Event of IOI 2022 Korean Representatives1.5K
Walking Through the Winter Forest
To feel the beauty of snowflakes, one must endure the cold.
Condition Solved 1 or more problems in the Invitation of the Winter Forest466
2022 1st Calculus, Probability, and Statistics Cup
Condition Solved 1 or more problems in the 2022 1st Calculus, Probability, and Statistics Cup360
SciOI 2022
Condition Participated in SciOI 2022, or solved 1 or more problems in its open contest88
Black and White
Life, like backgammon, is constant decision-making under uncertainty.
Condition Solved 3 or more problems in the Boardgame Cup481
The Entrepreneur's Guide to Mars
Coming to Mars was a big step. Making it habitable will give us a new world.
Condition Solved 5 or more problems in the Boardgame Cup262
The Art of Analysis
After a bad opening, there is hope for the middle game. After a bad middle game, there is hope for the endgame. But once you are in the endgame, the moment of truth has arrived.
Condition Solved 7 or more problems in the Boardgame Cup105