Roman Numeral Conversion | Dataford Interview Questions

Convert Roman numeral to integers.

Implement roman_to_integer(s), which accepts a valid uppercase Roman numeral and returns its integer value. Handle subtractive pairs such as IV, IX, XL, XC, CD, and CM.

Input is a string representing a canonical Roman numeral from 1 through 3999. Return an integer.

Constraints

1 <= len(s) <= 15
s contains only the uppercase symbols I, V, X, L, C, D, and M
s is a canonical Roman numeral representing an integer from 1 through 3999

Function Signature

def roman_to_integer(s):

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