Function romanToInt

Leetcode/RomanToInt.py:52–69

(s: str)

"""

def romanToInt(s: str) -> int:
    digits = {
        'I': 1,
        'V': 5,
        'X': 10,
        'L': 50,
        'C': 100,
        'D': 500,
        'M': 1000
    }
    length = len(s)
    v = digits[s[-1]];
    for i in range(1, length):
        if digits[s[i]] > digits[s[i - 1]]:
            v -= digits[s[i - 1]];
        else:
            v += digits[s[i - 1]];
    return v

if __name__ == '__main__':
    s=input()