using System;

using System.IO;

public static class Program

{

    public static void Main()

    {

        try

        {

        try

        {

        Console.WriteLine("Enter 1st no.");

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

        Console.WriteLine("Enter 2nd no.");

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

        int Result = FN/SN;

        Console.WriteLine("Result = {0}", Result);

        }

        catch(Exception ex)

        {

            string filePath = @"C:\Sample Files\Log.txt";

            if(File.Exists(filePath))

            {

                StreamWriter ST = new StreamWriter(filePath);

                ST.Write(ex.GetType().Name);

                ST.WriteLine();

                ST.Write(ex.Message);

                ST.Close();

                Console.WriteLine("Unknown Problem");

            }

            else

            {

                throw new FileNotFoundException(filePath + "doesn't exist", ex);

            }

        }

        }

        catch(Exception exception)

        {

            Console.WriteLine("Current Exception = {0}", exception.GetType().Name);

            Console.WriteLine("Inner Exception = {0}", exception.GetType().Name);

        }

    }

}