README.md

Integer to Roman

Solution 1

/**
 * Question   : 12. Integer to Roman
 * Complexity : Time: O(n) ; Space: O(1)
 * Topics     : String
 */
class Solution {
    public String intToRoman(int num) {
        int[] nums = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
        String[] romans = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};

        StringBuilder sb = new StringBuilder();

        int i = 0;
        while (i < nums.length) {
            if (num >= nums[i]) {
                sb.append(romans[i]);
                num -= nums[i];
            } else {
                i++;
            }
        }

        return sb.toString();
    }
}