import java.io.*;
import java.util.*;

class Average12
{
// A program to calculate the average of a series of integers
// read as a single line (uses StringTokenizer).

 public static void main(String[] args) throws IOException
 {
  int sum,count;
  BufferedReader in =  new BufferedReader(new InputStreamReader(System.in));
  System.out.println("Enter the numbers (on one line): ");
  StringTokenizer tokens = new StringTokenizer(in.readLine());
  for(sum=0,count=0; tokens.hasMoreTokens(); count++)
     sum+=Integer.parseInt(tokens.nextToken());
  System.out.println("Average is: "+Text.writeDouble((double)sum/count,5,3));
 }

}