Problems
Arena
Season 2021 — Platinum IV
Condition Reached Platinum IV in Season 2021828
On the Way to Work
Wanna take the bus to the otherworldly?
Condition Participated in Sogang Programming Contest 2021, or its Open Contest132
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
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