using System;

public class Program

{

    public static void Main()

    {

               int hours;

            int minutes;

            int seconds;

            string input;

            string answer;

            do

            {

                int totalSeconds = 0;

                while (totalSeconds < 86400)

                {

​

                    Console.Clear();

                    Console.WriteLine("Time Elapse");

                    Console.Write("Enter the number of hour(s)(0-24): ");

                    input = Console.ReadLine();

​

                    if (Int32.TryParse(input, out hours) == true)

                    {

                        if (hours >= 0 & hours <= 24)

                        {

                            totalSeconds += hours * 3600;

                            if (totalSeconds == 86400)

                            {

                               Console.WriteLine("The equivalent time in seconds is {0:#,000}", totalSeconds);

                                break;

                            }

                            Console.Write("Enter the number of minutes(s) (0-60): ");

                            input = Console.ReadLine();

                            if (Int32.TryParse(input, out minutes) == true)

                            {

                                if (minutes >= 0 & minutes <= 60)

                                {

                                    totalSeconds += minutes * 60;

                                    if (totalSeconds == 86400)

                                    {

                                        Console.WriteLine("The equivalent time in seconds is {0:#,000}", totalSeconds);

                                        break;

                                    }

                                    Console.Write("Enter the number of seconds(s)(0-60): ");

                                    input = Console.ReadLine();

                                    if (Int32.TryParse(input, out seconds) == true)

                                    {

                                        if (seconds >= 0 & seconds <= 60)

                                        {

                                            totalSeconds += seconds;

                                            Console.WriteLine("The equivalent time in seconds is {0:#,000}", totalSeconds);

                                        }

                                        else

                                        {

                                            Console.WriteLine("Invalid Input. Seconds value should be 0-60 only");

                                        }

                                    }

                                    else

                                    {

                                        Console.WriteLine("Invalid Input. Please input a numeric value");

​

                                    }

​

                                }

                                else

                                {

                                    Console.WriteLine("Invalid Input. Minute value should be 0-60 only");

                                }

                            }

                            else

                            {

                                Console.WriteLine("Invalid Input. Please input a numeric value");

                            }

                        }

                        else

                        {

                            Console.WriteLine("Invalid Input. Hour value should be 0-24 only");

                        }

                    }

                    else

                    {

                        Console.WriteLine("Invalid Input. Please input a numeric value");

                    }

                    break;

                }

                Console.Write("Do you want to try again? [Y/y]: ");

                answer = Console.ReadLine().ToUpper();

            } while (answer == "Y");

            Console.WriteLine("The Program has ended please any key to exit");

        }

    }

​