leetcode 12 Integer to Roman

lc12 Integer to Roman

因为题目输入只有1~3999，只需要将所有情况列出即可

class Solution {
    public String intToRoman(int num) {
        String[] symbol = {"M", "CM", "D","CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};
        int[] value = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
        StringBuilder sb = new StringBuilder();
        for(int i=0; i<13; i++){
            while(num >= value[i]){
                sb.append(symbol[i]);
                num -= value[i];
            }
        }
        
        return sb.toString();
    }
}