#238 is completed

Hamid Gasmi · Hamid Gasmi · commit dfc3f229ef77 · 2020-07-17T17:20:38.000-07:00
diff --git a/09-problems/lc_743_network_delay_time.py b/09-problems/lc_743_network_delay_time.py
@@ -1,7 +1,6 @@
 import math
 import heapq
-import collections
-   
+
 class Solution:
     def network_delay_time(self, times: List[List[int]], N: int, K: int) -> int:
         
