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

 1 class Solution {
 2     public String intToRoman(int num) {
 3         String[] symbol = {"M", "CM", "D","CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};
 4         int[] value = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
 5         StringBuilder sb = new StringBuilder();
 6         for(int i=0; i<13; i++){
 7             while(num >= value[i]){
 8                 sb.append(symbol[i]);
 9                 num -= value[i];
10             }
11         }
12         
13         return sb.toString();
14     }
15 }