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#!/usr/bin/env python
# -*- coding: utf-8 -*-
roman_map = {
"I": 1,
"IV": 4,
"V": 5,
"IX": 9,
"X": 10,
"XL": 40,
"L": 50,
"XC": 90,
"C": 100,
"CD": 400,
"D": 500,
"CM": 900,
"M": 1000,
}
def encode_to_roman(number):
result = ""
for roman, value in sorted(roman_map.items(), key=lambda x: -x[1]):
while number >= value:
result += roman
number -= value
return result
def decode_to_decimal(roman):
result = 0
index = 0
while index < len(roman):
if index < len(roman) - 1 and roman[index : index + 2] in roman_map:
result += roman_map[roman[index : index + 2]]
index += 2
else:
result += roman_map[roman[index]]
index += 1
return result
# Test the functions
roman_numeral = "CCXLVI"
print(f"Roman Numeral: {roman_numeral} -> Decimal: {decode_to_decimal(roman_numeral)}")
decimal_num = 39
print(f"Decimal: {decimal_num} -> Roman Numeral: {encode_to_roman(decimal_num)}")
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