Problems
Arena
TRICK|TREAT 2021
Solved a problem in Halloween 2021
Condition Solved previously unsolved problem at between October 31st, 2021 06:00 and November 1st, 2021 06:00 (KST)2.6K
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
ICPC World Finals Dhaka
Condition Participated in ICPC World Finals Dhaka Cheering Event871
Full Binary Christmas Tree
Condition Reach level 4 or deeper on the deepest ornament card in the Make a Tree event, 20221.1K
IOI 2023 Hungary
Condition IOI 2023 대한민국 대표팀을 응원 이벤트 참가1.1K