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

namespace TEST
{
    public class MYCLASS
    {
        public int a { get; private set; }
        public MYCLASS()
        {
        }
        public void add(int add)
        {
            a+=add;
        }
        public void write()
        {
            System.Console.WriteLine(a);
        }
    }
    public class MYCLASS2
    {
        public int a2 { get; set; }
    }
    class Program
    {
        const int element = 1000000;
        static MYCLASS[] elements = new MYCLASS[element];
        static MYCLASS2[] elements2 = new MYCLASS2[element];
        static List<MYCLASS> elementsList = new List<MYCLASS>();
        static List<MYCLASS2> elements2List = new List<MYCLASS2>();
        static void Main(string[] args)
        {
            Random randNext = new Random();

            obxod1(randNext);
            obxod2(randNext);
            obxod3(randNext);
            obxod4(randNext);
            System.Console.ReadLine();
        }

        private static void obxod1(Random randNext)
        {
            for (int i = 0; i < elements.Length; i++)
            {
                elements[i] = new MYCLASS();
                elements2[i] = new MYCLASS2();
            }
            TimeSpan start = DateTime.Now.TimeOfDay;
            for (int i = 0; i < elements.Length; i++)
            {
                elements[i].add(randNext.Next());
                elements2[i].a2 = elements[i].a;
            }
            System.Console.WriteLine("For:" + (DateTime.Now.TimeOfDay - start).TotalMilliseconds);
            start = DateTime.Now.TimeOfDay;
            int a = 0;
            foreach (MYCLASS el in elements)
            {
                el.add(randNext.Next());
                elements2[a].a2 = el.a;
                a += 1;
            }
            System.Console.WriteLine("Foreach(cout):" + (DateTime.Now.TimeOfDay - start).Milliseconds);
        }
        private static void obxod2(Random randNext)
        {
            for (int i = 0; i < elements.Length; i++)
            {
                elements[i] = new MYCLASS();
                elements[i].add(randNext.Next());
                elements2[i] = new MYCLASS2();
            }
            TimeSpan start = DateTime.Now.TimeOfDay;
            for (int i = 0; i < elements.Length; i++)
            {
                elements2[i].a2 = elements[i].a;
            }
            System.Console.WriteLine("For:" + (DateTime.Now.TimeOfDay - start).TotalMilliseconds);
            for (int i = 0; i < elements.Length; i++)
            {
                elements[i] = new MYCLASS();
                elements[i].add(randNext.Next());
                elements2[i] = new MYCLASS2();
            }
            start = DateTime.Now.TimeOfDay;
            int a = 0;
            foreach (MYCLASS el in elements)
            {
                elements2[a].a2 = el.a;
                a += 1;
            }
            System.Console.WriteLine("Foreach(cout):" + (DateTime.Now.TimeOfDay - start).Milliseconds);
        }

        //
        private static void obxod3(Random randNext)
        {
            for (int i = 0; i < element; i++)
            {
                elementsList.Add(new MYCLASS());
                elements2List.Add(new MYCLASS2());
            }
            TimeSpan start = DateTime.Now.TimeOfDay;
            for (int i = 0; i < elementsList.Count; i++)
            {
                elementsList[i].add(randNext.Next());
                elements2List[i].a2 = elementsList[i].a;
            }
            System.Console.WriteLine("For:" + (DateTime.Now.TimeOfDay - start).TotalMilliseconds);
            start = DateTime.Now.TimeOfDay;
            int a = 0;
            foreach (MYCLASS el in elementsList)
            {
                el.add(randNext.Next());
                elements2List[a].a2 = el.a;
                a += 1;
            }
            System.Console.WriteLine("Foreach(cout):" + (DateTime.Now.TimeOfDay - start).Milliseconds);
        }
        private static void obxod4(Random randNext)
        {
            elementsList.Clear();
            elements2List.Clear();
            for (int i = 0; i < elements.Length; i++)
            {
                elementsList.Add(new MYCLASS());
                elements2List.Add(new MYCLASS2());
                elementsList[i].add(randNext.Next());
            }
            TimeSpan start = DateTime.Now.TimeOfDay;
            for (int i = 0; i < elementsList.Count; i++)
            {
                elements2List[i].a2 = elementsList[i].a;
            }
            System.Console.WriteLine("For:" + (DateTime.Now.TimeOfDay - start).TotalMilliseconds);
            elementsList.Clear();
            elements2List.Clear();
            for (int i = 0; i < elements.Length; i++)
            {
                elementsList.Add(new MYCLASS());
                elements2List.Add(new MYCLASS2());
                elementsList[i].add(randNext.Next());
            }
            start = DateTime.Now.TimeOfDay;
            int a = 0;
            foreach (MYCLASS el in elementsList)
            {
                elements2List[a].a2 = el.a;
                a += 1;
            }
            System.Console.WriteLine("Foreach(cout):" + (DateTime.Now.TimeOfDay - start).Milliseconds);
        }
    }
}