#https://leetcode.com/problems/roman-to-integer/ class Solution(object): def romanToInt(self, s): counter = 0 special = { 'IV':4, 'IX':9, 'XL':40, 'XC':90, 'CD':400, 'CM':900, } normal = { 'I':1, 'V':5, 'X':10, 'L':50, 'C':100, 'D':500, 'M':1000 } for char, num in special.items(): if char in s: counter+=num s = s.replace(char, '') if s=='': return counter for char, num in normal.items(): if char in s: counter+=num*s.count(char) s = s.replace(char, '') if s=='': return counter return counter