diff --git a/findAllRoutes.py b/findAllRoutes.py
index f05582e..a0808a5 100755
--- a/findAllRoutes.py
+++ b/findAllRoutes.py
@@ -10,6 +10,14 @@ import fast_tsp
 import gpxpy
 import gpxpy.gpx
 import sys
+import argparse
+
+# copy down left triangle to up right
+def makeSymmetric(matrix :list[list[int]]) -> list[list[int]]:
+    for i in range(0, len(matrix)):
+        for j in range(0, i):
+            matrix[j][i] = matrix[i][j]
+    return matrix
 
 class Person:
     name: str
@@ -29,7 +37,12 @@ key: str
 matrix: list[list[dict[str, int]]] = []
 byWhat: str
 
-if len(sys.argv) == 2 and sys.argv[1] == "-l":
+parser = argparse.ArgumentParser()
+parser.add_argument("-l", "--length", action="store_true", help="Shortest length, otherwise time.")
+parser.add_argument("-r", "--reverse", action="store_true", help="Other direction.")
+args = parser.parse_args()
+
+if args.length:
     byWhat = 'length'
 else:
     byWhat = 'duration'
@@ -74,6 +87,9 @@ computeMatrix = {}
 computeMatrix['length'] = [[c['length'] for c in r] for r in matrix]
 computeMatrix['duration'] = [[c['duration'] for c in r] for r in matrix]
 
+#computeMatrix['length'] = makeSymmetric(computeMatrix['length'])
+#computeMatrix['duration'] = makeSymmetric(computeMatrix['duration'])
+
 tour = fast_tsp.solve_tsp_exact(computeMatrix[byWhat])
 print('Parametry cesty:')
 print('Délka:', fast_tsp.compute_cost(tour, computeMatrix['length'])/1000, 'km')
@@ -84,6 +100,9 @@ print('Doba:', duration//3600, 'h', (duration%3600)//60, 'm', duration%60, 's')
 gpx = gpxpy.gpx.GPX()
 points: list[gpxpy.gpx.GPXTrackPoint] = []
 
+if args.reverse:
+    tour.reverse()
+
 start = tour.index(0)
 
 for i in range(0, len(tour)):