using System;

public class Program

{

    public static void Main()

    {

        int acom=0, numero, prom; 

        for(int x=0; x<=19; x++)

            {

            Console.WriteLine("Ingrese numero");

            numero=Convert.ToInt32(Console.ReadLine());

            acom=acom+numero; 

            }

        prom=acom/20;

        Console.WriteLine("El promedio es " +prom);

    }

}