using System;
using System.IO;

namespace Konsa
{
    class Program
    {
        static Random rnd = new Random();

        static void Main(string[] args)
        {

            do
            {
                Console.Write("Enter quantity of numbers: ");
                int n = Check();
                Console.Write("Enter k: ");
                int k = Check2();
                File.WriteAllText("../../out.txt", "");

                int[] arr = GenerateArray(n, k);
                Writing(ref arr);
                ConsoleWriteng(ref arr, k);

                Console.WriteLine("Press 'Escape' button to quit the console or press any key to reenter data");
            } while (Console.ReadKey(true).Key != ConsoleKey.Escape); // Повтор решения
        }


        static int Check()
        {
            int n;
            while (!int.TryParse(Console.ReadLine(), out n) || n <= 0 || n > 100)
            {
                Console.WriteLine("Wrong\nPlease enter proper data");
                Console.WriteLine("Press 'Escape' button to quit the console or press any key to reenter data");
                if (Console.ReadKey(true).Key == ConsoleKey.Escape) Environment.Exit(0);
            }

            return n;
        }


        static int Check2()
        {
            int k;
            while (!int.TryParse(Console.ReadLine(), out k) || k <= 0 || k > 1000)
            {
                Console.WriteLine("Wrong\nPlease enter proper data");
                Console.WriteLine("Press 'Escape' button to quit the console or press any key to reenter data");
                if (Console.ReadKey(true).Key == ConsoleKey.Escape) Environment.Exit(0);
            }

            return k;
        }

        static int[] GenerateArray(int n, int k)
        {
            int[] arr = new int[n];
            for (int i = 0; i < n; i++)
            {
                if (i % k == 0)
                {
                    arr[i] = rnd.Next(-999, 1001);
                }

                int r;

                do
                {
                    r = rnd.Next(-3 * k, 5 * k);
                    if (r % 2 == 0)
                    {
                        arr[i] = r;
                    }
                } while (r % 2 != 0);
            }

            return arr;
        }

        static void Writing(ref int[] arr)
        {
            for (int i = 0; i < arr.Length; i++)
            {
                File.AppendAllText("../../out.txt", arr[i].ToString() + " ");
            }
        }

        static void ConsoleWriteng(ref int[] arr, int k)
        {
            int max = 0;
            int count = 0;
            int min = 0;
            int max2 = 0;

            Console.Write("Array: ");

            for (int i = 0; i < arr.Length; i++)
            {
                Console.Write(arr[i] + " ");
            }

            Console.Write("\nMax numbers aliquot k: ");
            File.AppendAllText("../../out.txt", "\nMax numbers aliquot k: ");

            for (int i = 0; i < arr.Length; i++)
            {
                if (arr[i] % k == 0)
                {
                    count++;

                    if (max < arr[i])
                    {
                        max = arr[i];
                        Console.Write(max + " ");
                        File.AppendAllText("../../out.txt", max.ToString());
                    }
                }
            }

            if (max == 0) Console.Write("There is no such numbers, \nthats why Differece is 0 and Difference #2 is equal to max number of array");

            int[] arrk = new int[count];

            for (int i = 0; i < count; i++)
            {
                if (arr[i] % k == 0)
                {
                    arrk[i] = arr[i];
                }
            }

            for (int i = 0; i < arrk.Length; i++)
            {
                if (min > arrk[i])
                {
                    min = arrk[i];
                }
            }

            for (int i = 0; i < arrk.Length; i++)
            {
                if (max2 < arrk[i])
                {
                    max2 = arrk[i];
                }
            }

            int difference = max2 - min;
            Console.WriteLine("\nDifference: " + difference);

            int max3 = 0;
            for (int i = 0; i < arr.Length; i++)
            {
                if (max3 < arr[i])
                {
                    max3 = arr[i];
                }
            }

            int difference2 = max3 - min;
            Console.WriteLine("Difference #2: " + difference2);
        }
    }
}