Sumamos todos: suma tú también. Si restas no sumas. Si sumas no restas, etc.
¡¡¡ A sumar !!!
Entrada
La entrada contiene dos números, que hay que sumar.
Salida
La salida es un número.
Observación
Es un problema francamente penoso.
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.