using System;

public class Program

{

    public static void Main()

    {

        //Jesús Prado Cervantes

    string name;

        double A,B,C,D;

        A=10.00;

        B=20.00;

        C=30.00;

        D=40.00;

        Console.WriteLine("Welcome ");

        Console.WriteLine("What is your name ? ");

        name=Console.ReadLine();

        Console.WriteLine("Welcome "+ name +" ¡");

        Console.WriteLine(" ");

        Console.WriteLine("I will help you with your avarage and tell you if you failed or not  ");

        Console.WriteLine("Please put your average with 2 decimaals . Example 68.00 ");

        Console.WriteLine("Please put your math result ");

        A=Double .Parse(Console.ReadLine());

        Console.WriteLine("Please put your physic  result ");

        B=Double .Parse(Console.ReadLine());

        Console.WriteLine("Please put your literature result ");

        C=Double .Parse(Console.ReadLine());

        Console.WriteLine("Please put your history result ");

        D=Double .Parse(Console.ReadLine());

        Console.WriteLine("Calculating your average ...");

        A =  A;

        B =  B;

        C = C;

        D = D;

        x =(A + B + C+ D)/4;

        if (x >70)

        {

        Console.ReadLine("Very good you pased with an average of" + x + "¡");

        }

        else 

        {

            Console.WriteLine("I'm sorry but you failed :( with an average of "+ x +"¡");

            Console.WriteLine("Thanks for use my app , Good Luck and study por the next exams ,Goodbyeeee");

        }   

}