diff --git a/LabMD_3/flights.py b/LabMD_3/flights.py
index 8b13789..28c84fa 100644
--- a/LabMD_3/flights.py
+++ b/LabMD_3/flights.py
@@ -1 +1,36 @@
 
+number_of_flights = int(input('number of flights:'))
+start = int(input('start:'))
+destination = int(input('destination:'))
+k = int(input('k:'))
+flights = [[0]*3]*number_of_flights
+
+
+def cheapest_route(fl, st, dest, k):
+    if st == dest:
+        return 0
+    if k < 0:
+        return float('inf')
+    cost = float('inf')
+
+    for i in fl:
+        if i[0] == st:
+            new_cost = i[2] + cheapest_route(fl, i[1], dest, k-1)
+            cost = min(cost, new_cost)
+    if cost == float('inf'):
+        return 'no route'
+    else:
+        return cost
+
+
+for q in range(number_of_flights):
+    flights[q] = [int(x) for x in input().split()]
+ans = cheapest_route(flights, start, destination, k)
+
+print(ans)
+# 1 2 15
+# 1 3 10
+# 1 4 50
+# 2 4 10
+# 3 2 3
+# 3 4 30