using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication44
{
    class Program
    {
        static void Main(string[] args)
        {
            DynamicArray dynArray = new DynamicArray();

            dynArray.AddToArray(1);
            dynArray.AddToArray(2);
            dynArray.AddToArray(3);
            dynArray.AddToArray(4);
            dynArray.AddToArray(5);
            dynArray.AddToArray(6);
            dynArray.AddToArray(7);
            dynArray.AddToArray(8);

            dynArray.ShowArray();

            dynArray.RemoveInterval(2, 4);
            dynArray.ShowArray();

            //dynArray.RemoveBefore(2);
            //dynArray.ShowArray();

            //dynArray.RemoveAfter(4);
            //dynArray.ShowArray();
        }
    }

    class DynamicArray
    {
        private int count = 0;

        private int[] array = new int[1];

        public void AddToArray(int element)
        {
            if (count < array.Length)
                array[count] = element;
            else
            {
                int[] tempArray = new int[array.Length * 2];
                for (int i = 0; i < array.Length; i++)
                    tempArray[i] = array[i];
                tempArray[count] = element;
                array = tempArray;
            }
            count++;
        }

        public void ShowArray()
        {
            for (int i = 0; i < count; i++)
                Console.WriteLine(array[i]);
            Console.WriteLine("array.Length " + array.Length);
            Console.WriteLine("Count " + count);
        }

        public int[] PublicArray()
        {
            int[] arrayCopy = new int[count];
            for (int i = 0; i < count; i++)
            {
                arrayCopy[i] = array[i];
            }
            return arrayCopy;
        }

        public void ClearArray()
        {
            array = new int[1];
            count = 0;
        }

        public void Destroyer(int x)
        {
            for (; x + 1 < count; x++)
                array[x] = array[x + 1];
            count--;
        }

        public void Raverse()
        {
            for (int i = 0; i < count / 2; i++)
            {
                int x = array[i];
                array[i] = array[count - 1 - i];
                array[count - 1 - i] = x;
            }
        }

        public void RemoveBefore(int x)
        {
            for (int i = 0; i < count - x; i++)
                array[i] = array[x + i];
            count -= x;
        }

        public void RemoveAfter(int x)
        {
            count = x;
        }

        public void RemoveInterval(int startIndex, int endIndex)
        {
            int interval = endIndex - startIndex;

            for (int i = 0; i < count - startIndex; i++)
            {
                array[startIndex + i] = array[endIndex + i];
            }
            count -= startIndex;
        }
    }
}