ROMAN TO INT

CONVERT A ROMAN NUMBER TO ARABIC (DECIMAL) NUMBER

Description

Given a function whose input parameter is a String with Correct ROMAN NUMERALS, return DECIMALS

examples:

Example 1:

Input: s = "III"
Output: 3
Explanation: III = 3.

Example 2:

Input: s = "LVIII"
Output: 58
Explanation: L = 50, V= 5, III = 3.

Example 3:

Input: s = "MCMXCIV"
Output: 1994
Explanation: M = 1000, CM = 900, XC = 90 and IV = 4.

SOLUTION

        fun romanToInt():Int{
    //First step is to read the Roman Numberv from end to the begining
    var result =0
    var prevResult =0;

    for (i in Data.romanNumber.value.length -1 downTo 0){
        var currentValue = Data.romanDictionary[Data.romanNumber.value[i]]?:0

        if (prevResult> currentValue){
            result -= currentValue
        }else{
            result += currentValue
        }
        prevResult = currentValue
    }

    return result
}