Programa una funció @hay_cruces(M)@ que, donada una matriu de
dimensions
(per
)
amb elements "-" i "*", retorni True quan hi hagi almenys una creu. Una
creu és un patró:
-*-
***
-*-
Exemple de sessió
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.