public class SalesApplication {
  public static void main(String[] args) {
    int x=0; float sum;
    Sales domestic = new Sales(3);
    Sales international = new Sales(2);
    while (x >= 0) {
      System.out.print("Enter product (-1 to quit): ");
      x = Input.readInt();
      if (x >= 0) {
        System.out.print("Enter price: ");
        sum = Input.readFloat();
        international.Sale(x, sum);
      }
    }
    System.out.println("\nInternational sales");
    international.printSales();
  }
}

class Sales {
  float [] total;
  
  public Sales (int count) {
    total = new float[count];
  }

  public void Sale (int product, float price) {
    if (product >= total.length) increaseSize(product);
    total[product] += price;
  }

  public void increaseSize(int n) {
    float [] tmp = new float[n+1];
    for (int i=0; i<total.length; i++)
      tmp[i] = total[i];
    total = tmp;
  }

  public void printSales() {
    for (int p=0; p<total.length; p++) {
      System.out.println("Product "+ p + ": " + total[p]);
    }
  }
}