/*

    1 - When you post a message on Facebook, depending on the number of people who like your post, Facebook displays different information.

    If no one likes your post, it doesn't display anything.

    If only one person likes your post, it displays: [Friend's Name] likes your post.

    If two people like your post, it displays: [Friend 1] and [Friend 2] like your post.

    If more than two people like your post, it displays: [Friend 1], [Friend 2] and [Number of Other People] others like your post.

    Write a program and continuously ask the user to enter different names, until the user presses Enter (without supplying a name). 

    Depending on the number of names provided, display a message based on the above pattern.

​

    2 - Write a program and ask the user to enter their name. Use an array to reverse the name and then store the result in a new string. 

    Display the reversed name on the console.

    3 - Write a program and ask the user to enter 5 numbers. If a number has been previously entered, display an error message and ask the user to re-try.

    Once the user successfully enters 5 unique numbers, sort them and display the result on the console.

    4 - Write a program and ask the user to continuously enter a number or type "Quit" to exit. The list of numbers may include duplicates. 

    Display the unique numbers that the user has entered.

    5 - Write a program and ask the user to supply a list of comma separated numbers (e.g 5, 1, 9, 2, 10). 

    If the list is empty or includes less than 5 numbers, display "Invalid List" and ask the user to re-try; otherwise, display the 3 smallest numbers in the list.

*/

​

using System;

using System.Collections.Generic;

public class Solutions

{

    public static void SolutionOne()

    {

        var list = new List<String>();

        while(true)

        {

            Console.WriteLine("Write a name:");             

            var input = Console.ReadLine();

            if(String.IsNullOrWhiteSpace(input))

                break;

            else

                list.Add(input);

        }

        switch(list.Count)

        {

            case 0:

                Console.WriteLine("Nobody likes your post");

                break;

            case 1:

                Console.WriteLine("{0} likes your post", list[0]);

                break;

            case 2:

                Console.WriteLine("{0} and {1} liked your post", list[0], list[1]);

                break;

            default:

                Console.WriteLine("{0} and {1} and {2} other people liked your post", list[0], list[1], (list.Count - 2));

                break;

        }

    }

    public static void SolutionTwo()

    {

        Console.Write("What's your name? ");

        var name = Console.ReadLine();

​

        var array = new char[name.Length];

        for (var i = name.Length; i > 0; i--)

        array[name.Length - i] = name[i - 1];

​

        var reversed = new string(array);

        Console.WriteLine("Reversed name: " + reversed);

    }

    public static void SolutionThree()

    {

        var list = new List<int>();

        while(list.Count < 5)

        {

            Console.WriteLine("Type 5 unique numbers:");

            var input = Convert.ToInt32(Console.ReadLine());

            if(list.Contains(input))

                Console.WriteLine("Error! Number already in list!");

            else

                list.Add(input);

        }

        list.Sort();

        foreach(var number in list)

        {

            Console.Write("{0} ", number);

        }

    }

    public static void SolutionFour()

    {

        var unique = new List<int>();

        while(true)

        {

            Console.WriteLine("Enter a number or type quit to leave");

            var input = Console.ReadLine();

            if(input.CompareTo("quit") == 0)

                break;

            else

            {

                var number = Convert.ToInt32(input);

                if(unique.Contains(number))

                    continue;

                else

                    unique.Add(number);

            }

        }

        foreach(var output in unique)

            Console.Write("{0} ", output);

    }

    public static void SolutionFive()

    {   

        var list = new List<int>();

        while(true)

        {

            Console.WriteLine("Type a list of number, separated by commas");

            var input = Console.ReadLine();

            var array = input.Split(',');

            if((array.Length == 0) || (array.Length < 5))

            {

                Console.WriteLine("Invalid list! Try again.");

            }

            else

            {

                foreach(var number in array)

                    list.Add(Convert.ToInt32(number));

                break;

            }

        }

        list.Sort();

        for(int i = 0; i <3; i++)

            Console.Write("{0} ", list[i]);

    }

}

​

public class Program

{

    public static void Main()

    {

        //Solutions.SolutionOne();

        //Solutions.SolutionTwo();

        //Solutions.SolutionThree();

        //Solutions.SolutionFour();

        //Solutions.SolutionFive();

    }

}