Roman Number to Integer | Practice | GeeksforGeeks

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Given a string in roman no format (s)  your task is to convert it to an integer . Various symbols and their values are given below.

I 1

V 5

X 10

L 50

C 100

D 500

M 1000

Example 1:

Input:
s = V
Output: 5

Example 2:

Input:
s = III 
Output: 3

Your Task:

Complete the function romanToDecimal() which takes an string as input parameter and returns the equivalent decimal number. 

Expected Time Complexity: O(|S|), |S| = length of string S.
Expected Auxiliary Space: O(1)

Constraints:

1<=roman no range<=3999

 





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