using System;
using System.Diagnostics;
using System.Threading;

class Program
{
#if DEBUG
  const int SIZE = 200;
#else
  const int SIZE = 768;
#endif
  static int[,] m1 = new int[SIZE, SIZE];
  static int[,] m2 = new int[SIZE, SIZE];
  static int[,] res1 = new int[SIZE, SIZE]; // seq
  static int[,] res2 = new int[SIZE, SIZE]; // pfor
  static int[,] res3 = new int[SIZE, SIZE]; // tasks
  static int[,] res4 = new int[SIZE, SIZE]; // pool
  
  static void Main()
  {
    // Populate arrays
    Random rgen = new Random(69);

    for (int i = 0; i < SIZE; i++)
      for (int j = 0; j < SIZE; j++)
        m1[i, j] = rgen.Next();

    for (int i = 0; i < SIZE; i++)
      for (int j = 0; j < SIZE; j++)
        m2[i, j] = rgen.Next();

    Stopwatch sw;
    #region Sequential
    Console.Write("Sequential: ");
    sw = Stopwatch.StartNew();
    MM.MulSeq(SIZE, m1, m2, res1);
    Console.WriteLine(sw.ElapsedMilliseconds.ToString());
    Thread.Sleep(2000);
    #endregion

    #region ParalleFor
    Console.Write("ParalleFor: ");
    sw = Stopwatch.StartNew();
    MM.MulPFor(SIZE, m1, m2, res2);
    Console.WriteLine(sw.ElapsedMilliseconds.ToString());
    Thread.Sleep(2000);
    #endregion

    #region Tasks
    Console.Write("Tasks     : ");
    sw = Stopwatch.StartNew();
    MM.MulTask(SIZE, m1, m2, res3);
    Console.WriteLine(sw.ElapsedMilliseconds.ToString());
    Thread.Sleep(2000);
    #endregion
      
    #region ThreadPool
    Console.Write("ThreadPool: ");
    sw = Stopwatch.StartNew();
    MM.MulPool(SIZE, m1, m2, res4);
    Console.WriteLine(sw.ElapsedMilliseconds.ToString());
    Thread.Sleep(2000);
    #endregion

    Console.ReadLine();
  }
}













//public static void VerifyArrays(double[,] r1, double[,] r2, double[,] r3, double[,] r4)
//{
//  bool result = true;

//  for (int i = 0; i < SIZE; i++)
//    for (int j = 0; j < SIZE; j++)
//      if (r1[i, j] != r2[i, j])
//        result = false;

//  for (int i = 0; i < SIZE; i++)
//    for (int j = 0; j < SIZE; j++)
//      if (r2[i, j] != r3[i, j])
//        result = false;

//  for (int i = 0; i < SIZE; i++)
//    for (int j = 0; j < SIZE; j++)
//      if (r3[i, j] != r4[i, j])
//        result = false;

//  if (!result)
//    Console.WriteLine("...Done, but different results :-( ");
//  else
//    Console.WriteLine("...Done :-) ");
//}