Black and White
problem — every listed problem · all sets
- internal id
- p-9c0b6f85
- appearances
- north-russia-2015 (north-russia-2015) — B
- held
- not recorded yet
- solve online
- Baekjoon Online Judge (wayback) closed 2026-04-28 id 11467
- data
- problemsets/north-russia-2015.yaml
St statement · D test data · IV/OV input/output validator · So solutions · P complete package — filled = held.