제 1회 하이콘 (2023) 제 1회 하이콘 혹은 Open Contest에 출전해 한 문제 이상 해결
257
IamCoder 2022 Year-end Contest Participated in IamCoder 2022 Year-end Contest, or in its open contest
269
Full Streak, Season 2 Maintain streak from June 5, 2022 to June 4, 2023
274
Spend 2023 with BOJ Solved 1 or more problems in Hello, BOJ 2023!
290
GBS Coding Contest 2022 Participated in GBS Coding Contest 2022, or solved 1 or more problems in its open contest
292
2023 Ajou University Programming Contest Participated in 2023 APC, or solved 1 or more problems in its open contest
314
2022 Seoul Cyber University Programming Contest Participated in 2022 Seoul Cyber University Programming Contest, or solved 1 or more problems in its open contest
339
2023 Chung-Ang University CHAC Participated in 2023 Chung-Ang University CHAC, or achieved a score of over 10 in its open contest
341
2023 UDPC Participated in the 2023 UDPC, or solved 1 or more problems in its open contest
349
2023 KSA Automata Winter Contest Achieved a score of over 100 in the 2023 KSA Automata Winter Contest
362
2023 Eggplant Cup Participated in 2023 Eggplant Cup
363
2023 Sogang University Freshman Cup Participated in 2023 Sogang University Freshman Cup, or solved 2 or more problems in its open contest
363
Spend 2022 with BOJ Solved 1 or more problems in Hello, BOJ 2022!
367
SUAPC 2023w Participated in SUAPC 2023 Winter, or solved 1 or more problems in its open contest
380
Level 9 Sprout Solved problems for 512 days in a row
412
Codemaster 2023 Participated in the Codemaster 2023 by Songdo Highschool, or solved 1 or more problems in its open contest
430
Dress Rehearsal (2023) Achieved a score of over 41 in the Dress Rehearsal
441
Warmth in the Snow (2022) Solved 1 or more problems in the Invitation of the Winter Forest
462
The Spy (2023) Participated in 2023 Inha University Programming Contest, or solved 1 or more problems in its open contest