using System;

public class Program

{

    class Employee

    {

        public string EmployeeID;

        public string EmployeeName;

        public string EmployeeAddress;

        public virtual void input()

        {

            Console.WriteLine("Enter emplyeeID: ");

            EmployeeID = Console.ReadLine();

            Console.WriteLine("Enter emplyee name: ");

            EmployeeName = Console.ReadLine();

            Console.WriteLine("Enter emplyee address: ");

            EmployeeAddress = Console.ReadLine();

        }

        public virtual void Show()

        {

            Console.WriteLine(EmployeeID);

            Console.WriteLine(EmployeeName);

            Console.WriteLine(EmployeeAddress);

        }

    }

        class FullTimeEmployee : Employee

        {

            public string EmployeeTask;

            public int EmployeeWorkingHours;

            public void CalculateSalary()

            {

                Console.WriteLine(250 + EmployeeWorkingHours * 10.80);

            }

            public override void input()

            {

                base.input();

                Console.WriteLine("Enter employee task: ");

                EmployeeTask = Console.ReadLine();

                Console.WriteLine("Enter employee working hours: ");

                EmployeeWorkingHours = int.Parse(Console.ReadLine());

            }

            public override void Show()

            {

                base.Show();

                Console.WriteLine(EmployeeTask);

                Console.WriteLine(EmployeeWorkingHours);                  

            }

        }

    class ContractEmployee : Employee

    {

        public string EmployeeContract;

        public override void input()

        {

            base.input();

            Console.WriteLine("Enter employee contract: ");

            EmployeeContract = Console.ReadLine();

        }

        public override void Show()

        {

            base.Show();

            Console.WriteLine(EmployeeContract);

        }

    }

    public static void Main()

    {

        Employee e1 = new Employee();

        e1.input();

        e1.Show();

        FullTimeEmployee f1 = new FullTimeEmployee();

        f1.input();

        f1.Show();

    }

}

​