// Arup Guha
// 7/13/04
// Solution to 2004 BHCSI Average program.

import java.io.*;

public class Ave {

  public static void main(String[] args) throws IOException {

    BufferedReader stdin = new BufferedReader
				(new InputStreamReader(System.in));

    // Get the user input.
    System.out.println("Please enter student 1's average");
    int score1 = Integer.parseInt(stdin.readLine());
    System.out.println("Please enter student 2's average");
    int score2 = Integer.parseInt(stdin.readLine());
    System.out.println("Please enter student 3's average");
    int score3 = Integer.parseInt(stdin.readLine());
    System.out.println("Please enter student 4's average");
    int score4 = Integer.parseInt(stdin.readLine());
    System.out.println("Please enter student 5's average");
    int score5 = Integer.parseInt(stdin.readLine());

    // Calculate the average by using real number division.
    double average = (score1+score2+score3+score4+score5)/5.0;

    // Output the result.
    System.out.println("................................");
    System.out.println("Your class average is "+average);
  }
}