content: package codingquestions.leetcode;
  
  /**
   * 12. Integer to Roman
   * Solved
   * Medium
   * Topics
   * Companies
   * Seven different symbols represent Roman numerals with the following values:
   * <p>
   * Symbol	Value
   * I	1
   * V	5
   * X	10
   * L	50
   * C	100
   * D	500
   * M	1000
   * Roman numerals are formed by appending the conversions of decimal place values from highest to lowest. Converting a decimal place value into a Roman numeral has the following rules:
   * <p>
   * If the value does not start with 4 or 9, select the symbol of the maximal value that can be subtracted from the input, append that symbol to the result, subtract its value, and convert the remainder to a Roman numeral.
   * If the value starts with 4 or 9 use the subtractive form representing one symbol subtracted from the following symbol, for example, 4 is 1 (I) less than 5 (V): IV and 9 is 1 (I) less than 10 (X): IX. Only the following subtractive forms are used: 4 (IV), 9 (IX), 40 (XL), 90 (XC), 400 (CD) and 900 (CM).
   * Only powers of 10 (I, X, C, M) can be appended consecutively at most 3 times to represent multiples of 10. You cannot append 5 (V), 50 (L), or 500 (D) multiple times. If you need to append a symbol 4 times use the subtractive form.
   * Given an integer, convert it to a Roman numeral.
   **/
  public class IntegertoRoman {
      private static final int[] values = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
      private static final String[] symbols = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};
  
      public String intToRoman(int num) {
          var sb = new StringBuilder();
          for (int i = 0; i < values.length; i++) {
              while (num >= values[i]) {
                  sb.append(symbols[i]);
                  num -= values[i];
              }
          }
          return sb.toString();
      }
  }
  