Update minimum-unique-word-abbreviation.py

Author: kamyu104

Python/minimum-unique-word-abbreviation.py

@@ -1,5 +1,5 @@
-# Time:  O(n * 2^n)
-# Space: O(n)
+# Time:  O((d + n) * 2^n)
+# Space: O(d)
 
 # optimized from Solution2
 class Solution(object):
@@ -53,8 +53,8 @@ def bits_to_abbr(targets, bits):
         return bits_to_abbr(target, result)
 
 
-# Time:  O(n * 2^n)
-# Space: O(n)
+# Time:  O((d + n) * 2^n)
+# Space: O(d + n)
 class Solution2(object):
     def minAbbreviation(self, target, dictionary):
         """