Question

ROMAN NUMERALS
Write a program to convert a given string representing an integer in Roman Numeral Format to
eger in Decimal Numeral Format.
Input:
string s representing the roman representation of a positive integer.
4
Output:
Single line containing the integer.
Constraints:
The roman representation for the input will lie between 1 to 500 (both
inclusive)
Reference:​

Answer 1

Explanation:

Let's use Python

Code:-

# Python program to convert Roman Numerals

# to Numbers

# This function returns value of each Roman symbol

def value(r):

if (r == 'I'):

return 1

if (r == 'V'):

return 5

if (r == 'X'):

return 10

if (r == 'L'):

return 50

if (r == 'C'):

return 100

if (r == 'D'):

return 500

if (r == 'M'):

return 1000

return -1

def romanToDecimal(str):

res = 0

i = 0

while (i < len(str)):

# Getting value of symbol s[i]

s1 = value(str[i])

if (i + 1 < len(str)):

# Getting value of symbol s[i + 1]

s2 = value(str[i + 1])

# Comparing both values

if (s1 >= s2):

# Value of current symbol is greater

# or equal to the next symbol

res = res + s1

i = i + 1

else:

# Value of current symbol is greater

# or equal to the next symbol

res = res + s2 - s1

i = i + 2

else:

res = res + s1

i = i + 1

return res

# Driver code

print("Integer form of Roman Numeral is"),

print(romanToDecimal("MCMIV"))