//
//	P.235

//	P225.java
//

import java.util.Scanner;

public class P225
{
	public static void main(String[] args)
	{
		Scanner kb = new Scanner(System.in);

		System.out.print("# of students? ");
		int numOfStudents = kb.nextInt();

		double next, average, sum = 0;
		int count;

		for(count=1; count<=numOfStudents; count++)
		{
			next = kb.nextDouble();
			sum += next;
		}
		average = sum/numOfStudents;

		System.out.println("Average = " + average);
	}
}