Hobby on Rails
problem — every listed problem · all sets
- internal id
- p-a7b83207
- appearances
- japan-2009 (japan-2009) — I
- held
- not recorded yet
- solve online
- Baekjoon Online Judge (wayback) closed 2026-04-28 id 3883
Aizu Online Judge (AOJ) id 1303
Codeforces Gym id 101414/I - data
- problemsets/japan-2009.yaml
St statement · D test data · IV/OV input/output validator · So solutions · P complete package — filled = held.