Update avoid-flood-in-the-city.py

kamyu104 · web-flow · commit 675b86c0c73a · 2020-06-22T02:49:03.000+08:00
diff --git a/Python/avoid-flood-in-the-city.py b/Python/avoid-flood-in-the-city.py
@@ -2,6 +2,7 @@
 # Space: O(n)
 
 import collections
+import heapq
 
 
 class Solution(object):
