using System;

public class Program

{

    public static void Main()

    {

                   int a, b, c, d, e, f;

​

            b = 30;

            d = 10;

            e = d;

            c = 20 + e;

            a = c + d;

            f = a + d;

​

            Console.WriteLine("++++++++++++++++++++++++++++++");

​

            Console.WriteLine();

​

            Console.WriteLine("The output for the problem is:");

​

            Console.WriteLine();

​

            Console.WriteLine("a = " + a);

            Console.WriteLine("b = " + b);

            Console.WriteLine("c = " + c);

            Console.WriteLine("d = " + d);

            Console.WriteLine("e = " + e);

            Console.WriteLine("f = " + f);

            Console.WriteLine();

            Console.WriteLine("++++++++++++++++++++++++++++++");

​

            Console.ReadLine(); 

    }

}