//
//
//	Goal: process file

import java.util.Scanner;
class File1
{
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);
		int data;
		int sum = 0;
		int size = 0;
		double avg;
		// p.41
		while( input.hasNextInt() )
		{
			data = input.nextInt();
			System.out.println(data);
			sum += data;
			size ++;
		}
		System.out.println("sum = " + sum);
		System.out.println("size = " + size);
		avg = (double)sum/size;

		System.out.println("avg = " + avg);
		System.out.println("\n\nDone.\n\n");
	}
}