Who is the Champion
problem — every listed problem · all sets
- internal id
- p-409da1db
- appearances
- nanchang-2019 (nanchang-2019) — L
- held
- not recorded yet
- solve online
- Luogu 洛谷 (Luògǔ) id P17815
- data
- problemsets/nanchang-2019.yaml
St statement · D test data · IV/OV input/output validator · So solutions · P complete package — filled = held.