Black and White
problem — every listed problem · all sets
- internal id
- p-b2787635
- appearances
- pacnw-2019 (pacnw-2019)
- held
- not recorded yet
- solve online
- Baekjoon Online Judge (wayback) closed 2026-04-28 id 18156
- data
- problemsets/pacnw-2019.yaml
St statement · D test data · IV/OV input/output validator · So solutions · P complete package — filled = held.