Problems
Arena
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
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
Full Binary Christmas Tree
Condition Reach level 4 or deeper on the deepest ornament card in the Make a Tree event, 20221.1K
๋ฉ๋ฆฌ ํฌ๋ฆฌ์ค๋ง์ค 2023
2023๋ ํฌ๋ฆฌ์ค๋ง์ค ์ด๋ธ ๋๋ ํฌ๋ฆฌ์ค๋ง์ค์ ํ ๋ฌธ์ ์ด์ ํด๊ฒฐํ๋ค
Condition 2023๋ 12์ 24์ผ ์ค์ 6์๋ถํฐ 2023๋ 12์ 26์ผ ์ค์ 6์ ์ฌ์ด์ ์ด์ ์ ํ์ง ์์๋ ๋ฌธ์ ์ค ์๋ฌด ๋ฌธ์ ๋ ํ ๋ฌธ์ ์ด์ ํด๊ฒฐ5.5K