class Solution {

 public:

     string intToRoman(int num) {

         string a[]={"I","IV","V","IX","X","XL","L","XC","C","CD","D","CM","M"};

         int b[]={,,,,,,,,,,,,};

         string str="";

         for(int i=;i>=;--i){

             while(num>=b[i]){

                 str+=a[i];

                 num=num-b[i];

             }

         }

         return str;

     }

 };