Dufus? -x-y = - (x+y)

As I said, you are not allowed to subtract two digits...

Cheers MC

Lady Pilot wrote:

"The_navigator©" wrote:

No Roman number subtracts more than one digit. Hence you cannot have
'CC' before 'M'.


BTW, you don't subtract more than one digit, you add. Dufus!

Prove your algorithm! You can't add two C's in a row, because it is
followed my the higher M.

LP