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- var roman = {
- 'I':1,
- 'V': 5,
- 'X': 10,
- 'L': 50,
- 'C': 100,
- 'D': 500,
- 'M': 1000,
- }
- const romanNumeral = string => {
- value = 0;
- arr = string.split('')
- for (var i = 0; i < arr.length; i++) {
- var ele = arr[i]
- var a = roman[ele];
- var b = roman[arr[i + 1]];
- if (a < b) {
- value += b - a;
- i++;
- } else {
- value += a;
- }
- if(a == null) {
- value = "null";
- }
- }
- return value
- }
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