Observation
problem — every listed problem · all sets
- internal id
- p-5ab26801
- appearances
- nanjing-2019 (nanjing-2019) — E
- held
- not recorded yet
- solve online
- Luogu 洛谷 (Luògǔ) id P17703
- data
- problemsets/nanjing-2019.yaml
St statement · D test data · IV/OV input/output validator · So solutions · P complete package — filled = held.