Updated solution

Author: irsol

1. Two Sum.py

@@ -6,6 +6,9 @@
 # You may assume that each input would have exactly one solution, and you may 
 # not use the same element twice.
 
+# Runtime: 36 ms, faster than 76.63% of Python online submissions for Two Sum.
+# Memory Usage: 13.1 MB, less than 46.92% of Python online submissions for Two Sum.
+
 def twoSum(nums, target):
     """
     :type nums: List[int]