/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* 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
	{
		// your code goes here
 
				int []a = {1, 4,9};
				int sum = 0;
				for (int t = 0; t<a.length; t++){
					sum+=a[t];
				}
				double avg = sum/a.length;
				System.out.println("average = "+avg);
	}
}

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