import java.util.*;
public class hasnextex
{
  static Scanner kb = new Scanner(System.in);
  public static void main(String[] args)
  {

    // number entered and the running total
    int inputNum, sum = 0;

    // count of valid and invalid numbers seen
    int numValid = 0, numInvalid = 0;
    int avgl;
    double average;


    System.out.print("Enter a positive value (EOF to quit): ");
    while ( kb.hasNext() )
    {
      inputNum = kb.nextInt();
      if (inputNum >= 0)
      {
        sum = sum + inputNum;
        numValid = numValid + 1;
      }
      else
      {
        System.out.println("The number " + inputNum + " is invalid.");
        numInvalid = numInvalid + 1;
      }
      System.out.print("Enter a positive value (EOF to quit): ");
    }

    avgl = 100 * sum / numValid;
    average = avgl / 100;

    System.out.println("There were " + numValid + " valid numbers entered");
    System.out.printf("The sum of the valid numbers was " + sum +  " and the average was " + average + ". ");
    System.out.println("There were " + numInvalid + " invalid numbers.");
  }
}