import java.lancs.BasicIo;

public class sum_while
{
  public static void main (String[] args) throws Exception
    {
      System.out.println ();
      System.out.print ("Specify a sequence of integers, ");
      System.out.print ("where the end of the sequence is indicated by the number -1");
      System.out.println ();
      System.out.println ();

      int total = 0;
      int iterations = 0;

      while (true)
        {
          int current_value = BasicIo.readInteger ();

          if (current_value == -1)
            break;

          total += current_value;       
          iterations++;
        }

      System.out.println ();

      System.out.println ("The total of " + iterations + 
                          " number(s) is: " + total);

      System.out.println ();
    }
}