class Solution(object):
def romanToInt(self, s):
"""
:type s: str
:rtype: int
"""
values = [1, 4, 5, 9, 10, 40, 50, 90, 100, 400, 500, 900, 1000]
numerals = ['I', 'IV', 'V', 'IX', 'X', 'XL', 'L', 'XC', 'C', 'CD', 'D', 'CM', 'M']
sum = 0
s = s[::-1]
while s != "":
if s[:2][::-1] in numerals:
sum += values[numerals.index(s[:2][::-1])]
s = s[2:]
elif s[:1] in numerals:
sum += values[numerals.index(s[:1])]
s = s[1:]
return sum
if __name__ == "__main__":
answer=Solution()
print answer.romanToInt("MCMXCVI")
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