Change output format of file

shortest_path.py

@@ -43,7 +43,9 @@ def bellman_ford(table, s):
         a, b, cab = table[j][0], table[j][1], table[j][2]
         if (dist[a] != math.inf and dist[b] > dist[a]+cab):
             print("Cycle négatif détecté")
-            return -1, -1
+            dist = [math.inf] * nb_nodes
+            dist[s] = 0
+            path = [-1] * nb_nodes
     return dist, path