[NP] Римски броеви

import java.util.Scanner;
import java.util.stream.IntStream;

public class RomanConverterTest {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        IntStream.range(0, n)
                .forEach(x -> System.out.println(RomanConverter.toRoman(scanner.nextInt())));
        scanner.close();
    }
}


class RomanConverter {
    /**
     * Roman to decimal converter
     *
     * @param n number in decimal format
     * @return string representation of the number in Roman numeral
     */
    public static String toRoman(int n) {
        StringBuilder sb = new StringBuilder();

    //count how many digits
    Integer counter = 0;
    int m = n;
    while(m != 0 && m > 0){
        m /= 10;
        counter++;
    }

    while(n != 0){
        if(n >= 1000){
            n -= 1000;
            sb.append("M");
        }
        if(n>899 && n<1000){
            n -= 900;
            sb.append("CM");
        }
        if(n>499 && n<900){
            n -= 500;
            sb.append("D");
        }
        if(n>399 && n<500){
            n -= 400;
            sb.append("CD");
        }
        if(n>99 && n<400){
            n -= 100;
            sb.append("C");
        }
        if(n>89 && n<100){
            n -= 90;
            sb.append("XC");
        }
        if(n>49 && n<90){
            n -= 50;
            sb.append("L");
        }
        if(n>39 && n<50){
            n -= 40;
            sb.append("XL");
        }
        if(n>9 && n<40){
            n -= 10;
            sb.append("X");
        }
        if(n == 9){
            n -= 9;
            sb.append("IX");
        }
        else if(n == 8){
            n -= 8;
            sb.append("VIII");
        }
        else if(n == 7){
            n -= 7;
            sb.append("VII");
        }
        else if(n == 6){
            n -= 6;
            sb.append("VI");
        }
        else if(n == 5){
            n -= 5;
            sb.append("V");
        }
        else if(n == 4){
            n -= 4;
            sb.append("IV");
        }
        else if(n == 3){
            n -= 3;
            sb.append("III");
        }
        else if(n == 2){
            n -= 2;
            sb.append("II");
        }
        else if(n == 1){
            n -= 1;
            sb.append("I");
        }
    }
        return sb.toString();
    }

}