ilya.petrash/SimplePyScripts: Collection of various python script's.

roman_numerals_decoder.py

37 строк695 B

ipetrash

Append roman_numerals_decoder.py

11 апр 2017, 15:18

11 апр 2017, 15:189726237

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

__author__ = 'ipetrash'


def solution(roman):
    roman_by_arabic = {
        'I': 1,
        'V': 5,
        'X': 10,
        'L': 50,
        'C': 100,
        'D': 500,
        'M': 1000,
    }

    total_number = 0
    last_num = -1

    for c in reversed(roman):
        current_number = roman_by_arabic[c]

        if current_number >= last_num:
            total_number += current_number
        else:
            total_number -= current_number

        last_num = current_number

    return total_number


if __name__ == '__main__':
    assert solution('XXI') == 21
    assert solution('XIX') == 19
    assert solution("MDCLXVI") == 1666