Boboniu and String

1394C2600· international gm3s256 MB⌨ stdin/stdout

Sample 1of 4

Input

3
B
N
BN

Output

1
BN

Sample 2of 4

Input

10
N
BBBBBB
BNNNBBNBB
NNNNBNBNNBNNNBBN
NBNBN
NNNNNN
BNBNBNBBBBNNNNBBBBNNBBNBNBBNBBBBBBBB
NNNNBN
NBBBBBBBB
NNNNNN

Output

12
BBBBBBBBBBBBNNNNNNNNNNNN

Sample 3of 4

Input

8
NNN
NNN
BBNNBBBN
NNNBNN
B
NNN
NNNNBNN
NNNNNNNNNNNNNNNBNNNNNNNBNB

Output

12
BBBBNNNNNNNNNNNN

Sample 4of 4

Input

3
BNNNBNNNNBNBBNNNBBNNNNBBBBNNBBBBBBNBBBBBNBBBNNBBBNBNBBBN
BBBNBBBBNNNNNBBNBBBNNNBB
BBBBBBBBBBBBBBNBBBBBNBBBBBNBBBBNB

Output

12
BBBBBBBBBBBBBBBBBBBBBBBBBBNNNNNNNNNNNN

1394C.cpp

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Ln 11·137 BGNU C++20 (64)