QOJ.ac
QOJ
Time Limit:
1 s
Memory Limit:
2048 MB
# 2896. Black and White
统计
The problem was used in the following contest:
- 2021-2022 ICPC North America - Southeast USA Regional - Division 1
- 2021-2022 ICPC North America - South Central USA Regional - Division 1
- 2021-2022 ICPC North America - Southeast USA Regional - Division 2
- 2021-2022 ICPC North America - South Central USA Regional - Division 2
- 2021-2022 ICPC North America - Pacific Northwest Regional Contest - Division 2
- 2021-2022 ICPC North America - Mid-Central USA Programming Contest