/// <summary>
 /// Display the cities in the final path.
 /// </summary>
 public void DisplaySolution()
 {
     int[] path = anneal.Array;
     for (int i = 0; i < path.Length; i++)
     {
         if (i != 0)
         {
             app.Write(">");
         }
         app.Write("" + path[i]);
     }
     app.WriteLine("");
 }