import java.util.Scanner;
public class average {
  public static void main(String[] arguments) {
    //Counts the number of Legal Values entered
    int count=0;
    double i;
    double sum;
    //Initializing scanner to take input
    Scanner user_input = new Scanner(System.in);
    //Printing statement to user regarding how to use program
    System.out.println("Please Enter the integers. Enter -1 to terminate\n");
    System.out.println("Please note that non-numeric characters and negative integers(other than -1) will be ignored\n");
    System.out.println("Floats will be cast as decimals\n");
    //This variable stores sum of the numbers entered
    sum = 0.0;
    do{
        i=user_input.nextDouble();
        //breaking loop where user enters -1 the very first time
        if ((int)i == -1){
                break;
                }
        //ignoring negative values less than -1
        if ((int)i < -1){
                //System.out.println("went wrong 1\n");
                continue;
                }

        //Increasing Count and calculating sum if legal value entered
        count = count+1;
        sum=sum+i;

        }while ((int)i != -1 && !i.hasNextDouble()) ;
    //Count will be zero only when user enters -1 the very first time.
    if(count > 0){
                    System.out.println("The Average is: " + (double)sum/(double)count);
                    }
    else {
            System.out.println("See you next time then\n");
            }

    user_input.close();
  }
}