Update 268-missing_number.py

stevestar888 · stevestar888 · commit 379775ed618e · 2020-06-27T23:27:24.000-05:00
diff --git a/268-missing_number.py b/268-missing_number.py
@@ -9,6 +9,7 @@
     Memory Usage: 13.7 MB, less than 5.26% of Python online submissions for Missing Number.
 
 More interesting solution: https://leetcode.com/problems/missing-number/discuss/69891/1-line-Python-Solution
+    it uses sum(range( ... ))
 """
 
 class Solution(object):
