The Proper Key
problem — every listed problem · all sets
- internal id
- p-2cd61eec
- appearances
- cerc-1999 (cerc-1999) — D
- held
- not recorded yet
- solve online
- Baekjoon Online Judge (wayback) closed 2026-04-28 id 3481
- data
- problemsets/cerc-1999.yaml
St statement · D test data · IV/OV input/output validator · So solutions · P complete package — filled = held.