Fun Region
problem — every listed problem · all sets
- internal id
- p-3fe9f104
- appearances
- japan-2019 (japan-2019) — J
- held
- not recorded yet
- solve online
- Baekjoon Online Judge (wayback) closed 2026-04-28 id 18219
Aizu Online Judge (AOJ) id 1409 - data
- problemsets/japan-2019.yaml
St statement · D test data · IV/OV input/output validator · So solutions · P complete package — filled = held.