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Roman to integer Leetcode Solution

 class Solution:

    def romanToInt(self, s: str) -> int:

        roman={ "I":1,"V":5,"X":10,"L":50,"C":100,"D":500,"M":1000}
        total=0
        for i in range(len(s)):
            if i+1<len(s) and roman[s[i]]<roman[s[i+1]]:
                total=total-(roman[s[i]])
            else:
                total=total+(roman[s[i]])
        return total

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