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