io

run.py

@@ -32,7 +32,7 @@ def run(show_plots=False):
             if show_plots:
                 solver.plot_solution()
 
-        if instance.optimal_tour:
+        if instance.exist_opt:
             solver.solution = np.concatenate([instance.optimal_tour, [instance.optimal_tour[0]]])
             solver.method = "optimal"
             solver.plot_solution()

src/io_tsp.py

@@ -48,7 +48,7 @@ class Instance:
             self.optimal_tour = np.zeros(self.nPoints)
             for i in range(self.nPoints):
                 line_i = lines[5 + i].split(' ')
-                self.optimal_tour[0] = int(line_i[0])
+                self.optimal_tour[0] = int(line_i[0]) - 1
 
     def print_info(self):
         print('name: ' + self.name)