Cover Up
problem — every listed problem · all sets
- internal id
- p-afcba11a
- appearances
- ecna-2009 (ecna-2009) — B
- held
- not recorded yet
- solve online
- Baekjoon Online Judge (wayback) closed 2026-04-28 id 4045
Codeforces Gym id 100645/B - data
- problemsets/ecna-2009.yaml
St statement · D test data · IV/OV input/output validator · So solutions · P complete package — filled = held.