Update divide-array-into-equal-pairs.py

kamyu104 · web-flow · commit 0513660ae939 · 2022-03-21T14:40:00.000+08:00
diff --git a/Python/divide-array-into-equal-pairs.py b/Python/divide-array-into-equal-pairs.py
@@ -1,6 +1,9 @@
 # Time:  O(n)
 # Space: O(n)
 
+import collections
+
+
 # freq table
 class Solution(object):
     def divideArray(self, nums):
