Blood groups
problem — every listed problem · all sets
- internal id
- p-a4b2e57b
- appearances
- south-america-south-2015 (south-america-south-2015) — B
- held
- not recorded yet
- solve online
- Baekjoon Online Judge (wayback) closed 2026-04-28 id 11542
- data
- problemsets/south-america-south-2015.yaml
St statement · D test data · IV/OV input/output validator · So solutions · P complete package — filled = held.