diff --git a/code/io_tsp.py b/code/io_tsp.py
index 866875d..3dc8819 100644
--- a/code/io_tsp.py
+++ b/code/io_tsp.py
@@ -60,4 +60,5 @@ class Instance:
         for i in range(self.nPoints):
             for j in range(i, self.nPoints):
                 self.dist_matrix[i, j] = self.distance_euc(self.points[i][1:3], self.points[j][1:3])
+        self.dist_matrix += self.dist_matrix.T
 
diff --git a/run.py b/run.py
index cccdd72..89b9577 100644
--- a/run.py
+++ b/run.py
@@ -11,5 +11,7 @@ def run():
         instance.plot_data()
 
 
+
+
 if __name__ == '__main__':
     run()