diff --git a/run.py b/run.py
index 238a88a..d09753e 100644
--- a/run.py
+++ b/run.py
@@ -33,7 +33,6 @@ def run(show_plots=False):
                 solver.plot_solution()
 
         if instance.exist_opt:
-            print(instance.optimal_tour)
             solver.solution = np.concatenate([instance.optimal_tour, [instance.optimal_tour[0]]])
             solver.method = "optimal"
             solver.plot_solution()
diff --git a/src/io_tsp.py b/src/io_tsp.py
index f4e0316..9172de7 100644
--- a/src/io_tsp.py
+++ b/src/io_tsp.py
@@ -31,7 +31,7 @@ class Instance:
         self.points = np.zeros((self.nPoints, 3))
         for i in range(self.nPoints):
             line_i = self.lines[7 + i].split(' ')
-            self.points[i, 0] = line_i[0]
+            self.points[i, 0] = int(line_i[0])
             self.points[i, 1] = line_i[1]
             self.points[i, 2] = line_i[2]