#D7865. Black and White Boxes
Black and White Boxes
Black and White Boxes
Example
Input
4 B W WB WB
Output
5
inputFormat
Input
4 B W WB WB
outputFormat
Output
5
样例
4
B
W
WB
WB5
Example
Input
4 B W WB WB
Output
5
Input
4 B W WB WB
Output
5
4
B
W
WB
WB5