Roman numeral by murky-satyr

#!ruby -n
def m s;1+[999,9,4,0,99,499,49][s[0]%87%7]end
r=0
scan(/./){n=m$&;r+=n<m($')?-n:n}
p r

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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