Problems
Arena
Season 2020 — Gold II
Condition Reached Gold II in Season 2020861
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
ICPC World Finals Moscow
Condition Participated in ICPC World Finals Moscow Cheering Event601
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
All Solve! — Bronze V
Condition Solved every Bronze V problem after November 30th, 20212.4K
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
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)9.7K
Icons: Dark Mode
Icons in solved.ac, now in dark mode.
Condition (Hidden)4.7K
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 — Platinum V
Condition Reached Platinum V in Season 20211.5K
UCPC 2022
Condition Participated in UCPC 2022, or in its open contest996
Midsummer Memories
Condition Achieve a score of over 1,800 in the Postcard Decoration Event 20221.4K
IOI 2022 Indonesia
Condition Participated in the Cheering Event of IOI 2022 Korean Representatives1.5K
Red Periscope
The famous Red Periscope of Sinchon.
Condition Participated in 2022 ICPC Sinchon Summer Algorithm Camp Contest, or solved 1 or more problems in its open contest389
The 2nd Korea Aerospace University Programming Contest
Condition Participated in the 2nd Korea Aerospace University Programming Contest, or solved 1 or more problems in its open contest165
The 1st Chocolate Cup
Condition Solved 1 or more problems in the 1st Chocolate Cup192
2022 1st Calculus, Probability, and Statistics Cup
Condition Solved 1 or more problems in the 2022 1st Calculus, Probability, and Statistics Cup360
Full Binary Christmas Tree
Condition Reach level 4 or deeper on the deepest ornament card in the Make a Tree event, 20221.1K