using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        //Exercise1();

        Exercise2();

    }

    /*

    Write a program and ask the user to enter a few numbers separated by a hyphen. 

    Work out if the numbers are consecutive. 

    For example, if the input is "5-6-7-8-9" or "20-19-18-17-16", display a message: 

    "Consecutive"; otherwise, display "Not Consecutive".

    */

    private static void Exercise1() 

    {

        Console.WriteLine("Enter a few numbers seperated by a hyphen.");

        var prompt = Console.ReadLine();

        var numbers = new List<int>();

        foreach(var num in prompt.Split('-'))

        {

            var tempNum = Convert.ToInt32(num);

            if (numbers.Count < 1)

            {

                numbers.Add(tempNum);

                continue;

            }

            if (numbers[numbers.Count - 1] != tempNum - 1)

            {

                Console.WriteLine("Not Consecutive");

                return;

            }

            numbers.Add(tempNum);

        }

        Console.WriteLine("Consecutive");

    }

    /*

    Write a program and ask the user to enter a few numbers separated by a hyphen. 

    If the user simply presses Enter, without supplying an input, exit immediately; 

    otherwise, check to see if there are duplicates. If so, display "Duplicate" on the console.

    */

    private static void Exercise2()

    {

        Console.WriteLine("Enter a few numbers seperated by a hyphen");

        var prompt = Console.ReadLine();

        if (string.IsNullOrWhiteSpace(prompt))

            return;

        var numberList = new List<int>();

        foreach (var num in prompt.Split('-'))

        {

            var tempNum = Convert.ToInt32(num);

            if (numberList.Contains(tempNum))

            {

                Console.WriteLine("Duplicate");

                return;

            }

            numberList.Add(tempNum);

        }

        Console.WriteLine("No ducplicates found in " + prompt);

    }

    /*

    Write a program and ask the user to enter a time value in the 24-hour time format (e.g. 19:00). 

    A valid time should be between 00:00 and 23:59. 

    If the time is valid, display "Ok"; otherwise, display "Invalid Time". 

    If the user doesn't provide any values, consider it as invalid time.

    */

    private static void Exercise3()

    {

        Console.WriteLine("");

    }

    /*

    Write a program and ask the user to enter a few words separated by a space. 

    Use the words to create a variable name with PascalCase. 

    For example, if the user types: "number of students", display "NumberOfStudents". 

    Make sure that the program is not dependent on the input. 

    So, if the user types "NUMBER OF STUDENTS", the program should still display "NumberOfStudents".

    */

    private static void Exercise4()

    {

    }

    /*

    Write a program and ask the user to enter an English word. 

    Count the number of vowels (a, e, o, u, i) in the word. 

    So, if the user enters "inadequate", the program should display 6 on the console.

    */

    private static void Exercise5() 

    {

    }

}