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424A900· newbie1s256 MB⌨ stdin/stdout

#implementation

Examples

Sample 1of 3

Input

4
xxXx

Output

1
XxXx

Sample 2of 3

Input

2
XX

Output

1
xX

Sample 3of 3

Input

6
xXXxXx

Output

0
xXXxXx

424A.cpp

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Ln 11·137 BGNU C++20 (64)