def value(x): if x == 'I': return 1 elif x == 'V': return 5 elif x == 'X': return 10 elif x == 'L': return 50 elif x == 'C': return 100 elif x == 'D': return 500 elif x == 'M': return 1000 else: return 0 def convert(roman): count = len(roman) - 1 retVal = 0 while (count >= 0): if count == len(roman) - 1: #only one character or the last letter so just set it's value to avoid index errors retVal = value(roman[count]) else: if value(roman[count]) >= value(roman[count +1]): retVal = retVal + value(roman[count]) else: retVal = retVal - value(roman[count]) count = count - 1 return retVal print(convert('MMXIV'))
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