/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
class Employee {
	final int salary;
 
	public Employee(int salary) {
		this.salary = salary;
	}
}
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Employee[] employees = new Employee[] { new Employee(22), new Employee(13), new Employee(5) };
		double avg = calcAverage(employees);
		System.out.println(avg);
	}
 
	private static double calcAverage(Employee[] employees) {
	   double sum = Arrays.stream(employees).map(e -> e.salary).reduce(0, (a, b) -> a + b);	
	   return sum / employees.length;
	}
}

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