function convertToRoman(num) {
  var array = num.toString().split('');
  var arrayFull = [];
  var arrayRoman = [];

  var roman1 = ['', 'I', 'II', 'III', 'IV', 'V', 'VI', 'VII', 'VIII', 'IX'];
  var roman2 = ['', 'X', 'XX', 'XXX', 'XL', 'L', 'LX', 'LXX', 'LXXX', 'XC'];
  var roman3 = ['', 'C', 'CC', 'CCC', 'CD', 'D', 'DC', 'DCC', 'DCCC', 'CM'];
  var roman4 = ['', 'M', 'MM', 'MMM'];

  for (var i = 0; i <= 3; i++) {
    if (typeof array[i] === 'undefined')
      arrayFull.unshift('0');
    else
      arrayFull[i] = array[i];
  }

  arrayRoman = [
    roman4[arrayFull[0]],
    roman3[arrayFull[1]],
    roman2[arrayFull[2]],
    roman1[arrayFull[3]]];

  return arrayRoman.join('');
}