using System using System Collections Generic using System Linq using

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

namespace ConsoleApp4
{
	class Programm
	{
		public class DateTimeList
		{
			private List<DateTime> list = new List<DateTime>();

			public DateTimeList(int capacity)
			{
				list = new List<DateTime>(capacity);
			}

			public void Add(DateTime item)
			{
				list.Add(item);
			}

			public void Reverse(int startIndex, int endIndex)
			{
				list.Reverse(startIndex, endIndex - startIndex + 1);
			}

			public void Clear()
			{
				list.Clear();
				list.Capacity = 0;
			}

			public DateTime this[int index]
			{
				get { return list[index]; }
				set { list[index] = value; }
			}

			public DateTimeList GetRangeIntList(int index, int count)
			{
				var new_list = new DateTimeList(count);
				for (int i = index; i < index + count; i++)
				{
					new_list.Add(list[i]);
				}

				return new_list;
			}

			public int Capacity => list.Capacity;
			public int Count => list.Count;
			
		}
		static void Main(string[] args)
		{
			var list = new DateTimeList(10);
			list.Add(new DateTime(2015, 6, 1));
			list.Add(new DateTime(2015, 6, 12));
			list.Add(new DateTime(2015, 6, 3));
			list.Add(new DateTime(2015, 6, 8));
			list.Add(new DateTime(2015, 6, 5));

			Console.WriteLine("Capacity : {0}", list.Capacity);
			Console.WriteLine("Count : {0}", list.Count);
			Console.WriteLine();
			for (int i = 0; i < list.Count; i++)
			{
				Console.Write("{0} ", list[i].ToShortDateString());
			}
			Console.WriteLine();
			list.Reverse(1, list.Count - 2);
			for (int i = 0; i < list.Count; i++)
			{
				Console.Write("{0} ", list[i].ToShortDateString());
			}
			Console.WriteLine();

			var sub_list = list.GetRangeIntList(1, 3);
			for (int i = 0; i < sub_list.Count; i++)
			{
				Console.Write("{0} ", sub_list[i].ToShortDateString());
			}
			Console.WriteLine();
			Console.WriteLine("Capacity : {0}", sub_list.Capacity);
			Console.WriteLine("Count : {0}", sub_list.Count);
			Console.WriteLine();
			sub_list.Clear();
			Console.WriteLine("Capacity : {0}", sub_list.Capacity);
			Console.WriteLine("Count : {0}", sub_list.Count);
			Console.WriteLine();
		}
	}
}