imported math module

rchangdar · rchangdar · commit 6c5bbed85c3d · 2020-05-08T17:09:13.000+05:30
diff --git a/algorithms/tests/test_binary_tree.py b/algorithms/tests/test_binary_tree.py
@@ -1,3 +1,4 @@
+import math
 import copy
 import unittest
 
