Update equal-row-and-column-pairs.py

kamyu104 · web-flow · commit 53b6137f7344 · 2022-07-26T03:36:37.000+08:00
diff --git a/Python/equal-row-and-column-pairs.py b/Python/equal-row-and-column-pairs.py
@@ -2,6 +2,7 @@
 # Space: O(n^2)
 
 import collections
+import itertools
 
 
 # hash table
