12.integer-to-roman.java

/*
 * @lc app=leetcode id=12 lang=java
 *
 * [12] Integer to Roman
 */
class Solution {
    public String intToRoman(int num) {
        int arabs[] = {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();
        
        for (int i = 0; i < arabs.length; i++) {
            while (num >= arabs[i]) {
                sb.append(romans[i]);
                num -= arabs[i];
            }
        }
        
        return sb.toString();
    }
}