La salida es un dibujo a base de X con la forma de valle que puedes ver en los ejemplos.
About statements
The official statement of a problem is always the one
in the PDF document. The HTML version of the statement
is also given to help you, but may contain some content
that is not well displayed. In case of doubt, always use the PDF.
Public test cases
Input
5
Output
X X
XX XX
XXX XXX
XXXX XXXX
XXXXX XXXXX
Input
5
Output
X X
XX XX
XXX XXX
XXXX XXXX
XXXXX XXXXX
Input
8
Output
X X
XX XX
XXX XXX
XXXX XXXX
XXXXX XXXXX
XXXXXX XXXXXX
XXXXXXX XXXXXXX
XXXXXXXX XXXXXXXX
Input
8
Output
X X
XX XX
XXX XXX
XXXX XXXX
XXXXX XXXXX
XXXXXX XXXXXX
XXXXXXX XXXXXXX
XXXXXXXX XXXXXXXX