152 }

   152 }

   153 */

   153 */

   154 

   154 

   155 // 15 secs for 8 x 8

   155 // 15 secs for 8 x 8

   156 //val ts1 = time_needed(0,first_tour(8, List((0, 0))).get)

   156 //val ts1 = time_needed(0,first_tour(8, List((0, 0))).get)

   157 

   158 

   158 // no result for 4 x 4

   159 // no result for 4 x 4

   159 //val ts2 = time_needed(0, first_tour(4, List((0, 0))))

   160 //val ts2 = time_needed(0, first_tour(4, List((0, 0))))

   160 

   161 

   161 // 0.3 secs for 6 x 6

   162 // 0.3 secs for 6 x 6