using System;

public class Program

{

    public static void Main()

    {

    double sum = 0;

    double average = 0;

    int n;

        Console.WriteLine("How many numbers: ");

        n = Int32.Parse(Console.ReadLine());

        double[] numbers = new double[n];

        for (int i = 0; i < numbers.Length; i++)

        {

            Console.WriteLine("Number {0} : ", i + 1);

            numbers[i] = Convert.ToDouble(Console.ReadLine());

            sum += numbers[i];

            average = sum / numbers.Length;

        }

    Console.WriteLine();

    Console.WriteLine("Sum is " + sum);

    Console.WriteLine("Average is " + average);

    }

}