using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter First Number : ");

        try

        {

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

            Console.WriteLine("Enter Second Number : ");

            try

            {

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

                int sum = FirstNumber / SecondNumber;

                Console.WriteLine("Answer : " + sum);

            }

            catch (FormatException)

            {

                Console.WriteLine("Invalid Second Number.");

            }

            catch (DivideByZeroException)

            {

                Console.WriteLine("Cannot divide by zero. ");

            }

        }

        catch (FormatException)

        {

            Console.WriteLine("Invalid First Number");

        }

    }

}