Solution.java

import java.io.*;
import java.util.*;

public class Solution {
    public static String formatRupiah(int nominal) {
        String strNominal = String.valueOf(nominal);
        String strNominalFormatted = "";
        int counter = 0;
        for (int i = strNominal.length() - 1; i >= 0; i--) {
            strNominalFormatted = strNominal.charAt(i) + strNominalFormatted;
            counter++;
            if (counter == 3 && i != 0) {
                strNominalFormatted = "." + strNominalFormatted;
                counter = 0;
            }
        }
        return strNominalFormatted;
    }

    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        Scanner scanner = new Scanner(System.in);
        
        int menu = Integer.parseInt(scanner.nextLine());
        int jumlah = Integer.parseInt(scanner.nextLine());

        int hargaNasiGoreng = 20000;
        int hargaMieGoreng = 30000;

        int total = 0;

        String namaMenu = "";
        int hargaMenu = 0;
        if (menu == 1) {
            total = hargaNasiGoreng * jumlah;
            namaMenu = "Nasi Goreng";
            hargaMenu = hargaNasiGoreng;
        } else if (menu == 2) {
            total = hargaMieGoreng * jumlah;
            namaMenu = "Mie Goreng";
            hargaMenu = hargaMieGoreng;
        }

        if (jumlah > 20) {
            total = total - (total * 20 / 100);
        }

        System.out.println("Nama Pesanan\t= " + namaMenu);
        System.out.println("Jumlah Pesanan\t= " + jumlah);
        System.out.println("Harga Pesanan\t= " + formatRupiah(hargaMenu));
        System.out.println("Total Pesanan\t= " + formatRupiah(total));

        if (jumlah < 2) {
            System.out.println("belanja lagi dong");
        }
    }
}