using System;

public class Program

{

    public static void Main()

    {

        Program c=new Program();

        Console.WriteLine("enter acnt number");

        int ac=Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("enter pin number");

        int pin=1234;   

        string s=String.Empty;

          int tbal=20000;

        int number=Convert.ToInt32(Console.ReadLine());

    if(number==pin){

        Console.WriteLine("choose transaction type");

      s=Console.ReadLine();

        if(s=="W" ||s=="w"){

            c.withdrw(tbal);

        }else

        {

            if(s=="D" ||s=="d")

            {

                c.depo(tbal); }

        else{Console.WriteLine("inavalid option");}

        }}else{Console.WriteLine("enter correct pin");}

    }

    public void withdrw(int tbal){

         Console.WriteLine("enter amount");

                                     int wd=Convert.ToInt32(Console.ReadLine());    

                               if(wd>tbal){

                                   Console.WriteLine("enter valid amount");

                               }else{

                                    tbal=tbal-wd;

                                   Console.WriteLine("transaction succuss"+tbal);

                                    }

    }

     public int depo(int tbal){

    int de=Convert.ToInt32(Console.ReadLine());  

                                                   tbal=tbal+de;

                                                  Console.WriteLine("transaction succuss"+tbal);

                    return 0;                     

    }

}