import java.io.*;

class Average6e
{
// A program that calculates the average of a series of 
// integers. It prompts for each one. A non-numeric value 
// indicates the end of the series.
  
 public static void main(String[] args) throws IOException
 {
  BufferedReader in = new BufferedReader
                       (new InputStreamReader(System.in));
  int sum=0,count=1,n,fraction;
  while(true)
     {
      System.out.print("Enter number "+count);
      System.out.print(" or a non-number to finish: ");
      try {
           n=Integer.parseInt(in.readLine());
           sum+=n;
           count++;
          }
      catch(NumberFormatException e)
          {
           break;
          }
     }
  try {
       System.out.print("Average is: "+sum/(count-1)+".");
       fraction = (sum*100/(count-1))%100;
       if(fraction<10)
          System.out.println("0"+fraction);
       else
          System.out.println(fraction);
      }
  catch(ArithmeticException e)
      {
       System.out.println("No data entered");
      }
 }
}