function convertToRoman(num) {
    // key
    var numForKey = [1, 4, 5, 9, 10, 40, 50, 90, 100, 400, 500, 900, 1000];
    var lettersForKey = ['I', 'IV', 'V', 'IX', 'X', 'XL', 'L', 'XC', 'C', 'CD', 'D', 'CM', 'M'];

    var splitNum = (num).toString(10).split("").map(Number);
    console.log(splitNum);

    var multipliedNums = [];

    if (splitNum.length == 4) {
        multipliedNums.push(splitNum[0] * 1000);
        multipliedNums.push(splitNum[1] * 100);
        multipliedNums.push(splitNum[2] * 10);
        multipliedNums.push(splitNum[3]);
    } else if (splitNum.length == 3) {
        multipliedNums.push(splitNum[0] * 100);
        multipliedNums.push(splitNum[1] * 10);
        multipliedNums.push(splitNum[2]);
    } else if (splitNum.length == 2) {
        multipliedNums.push(splitNum[0] * 10);
        multipliedNums.push(splitNum[1]);
    } else {
        multipliedNums.push(splitNum[0]);
    }

    console.log(multipliedNums);

    var convertedNums = [];

    for (var i = 0; i < multipliedNums.length; i++) {
        var remainHolder = 0;

        for (var n = 0; n < numForKey.length; n++) {
            if (multipliedNums[i] == numForKey[n]) {
                convertedNums.push(lettersForKey[n]);
            } else if (multipliedNums[i] == numForKey[n] * 2) {
                convertedNums.push(lettersForKey[n]);
                convertedNums.push(lettersForKey[n]);
            } else if (multipliedNums[i] == numForKey[n] * 3) {
                convertedNums.push(lettersForKey[n]);
                convertedNums.push(lettersForKey[n]);
                convertedNums.push(lettersForKey[n]);
            }
        }

        for (var z = numForKey.length; z != 0; z--) {
            if (multipliedNums[i] < numForKey[z]) {
                convertedNums.push(lettersForKey[z]);
                remainHolder = numForKey[z] % multipliedNums[i];

                for (var x = 0; x < numForKey.length; x++) {
                    if (remainHolder == numForKey[x]) {
                        convertedNums.push(lettersForKey[x]);
                    } else if (remainHolder == numForKey[x] * 2) {
                        convertedNums.push(lettersForKey[x]);
                        convertedNums.push(lettersForKey[x]);
                    } else if (remainHolder == numForKey[x] * 3) {
                        convertedNums.push(lettersForKey[x]);
                        convertedNums.push(lettersForKey[x]);
                        convertedNums.push(lettersForKey[x]);
                    }

                    break;
                }
            }
        }
    }

    console.log(convertedNums);

    num = convertedNums.join("");
    console.log(num);
    return num;
}


convertToRoman(99);