using System;

public class Program

{

    public static void Main()

    {

        //Lian Eng

        string name;

        double math, lit, phy, his, ave;

        Console.WriteLine("Hello there!");

        Console.WriteLine("What's your name?");

        name = Console.ReadLine();

        Console.WriteLine( "Nice to meet you, " + name + "!");

        Console.WriteLine();

        Console.WriteLine("I will help you calculating your average and tell you if you passed or not.");

        Console.WriteLine("What's your Math grade?");

        math = double.Parse(Console.ReadLine());

        Console.WriteLine("What's your Literature grade?");

        lit = double.Parse(Console.ReadLine());

        Console.WriteLine("What's your Physics grade?");

        phy = double.Parse(Console.ReadLine());

        Console.WriteLine("What's your History grade?");

        his = double.Parse(Console.ReadLine());

        ave = ( math + lit + phy + his ) / 4;

        if (ave >= 70)

        {

        Console.WriteLine( "Very Good! You passed with an average of " + ave);

        }

        else 

        {

            Console.WriteLine( "I’m sorry, you failed with an average of  " + ave);

        }

        Console.WriteLine("See you next time, bye!");

    }

}