class Solution: def romanToInt(self, s: str) -> int: try: roman = {"I":1,"V":5,"X":10,"L":50,"C":100,"D":500,"M":1000} res = 0 for i in range(len(s)): if i + 1 < len(s) and roman[s[i]] < roman[s[i+1]]: res -= roman[s[i]] else: res += roman[s[i]] return res except Exception as e: print(e)