Update 3sum.py

yingl · web-flow · commit 171cda5100a0 · 2017-04-25T18:53:53.000+08:00
diff --git a/3sum.py b/3sum.py
@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# coding: utf-8
 
 class Solution:
     """
@@ -32,4 +32,6 @@ def twoSum(self, numbers, target, start, end):
                 start += 1
             else:
                 end -= 1
-        return ret
+        return ret
+
+# medium: http://lintcode.com/zh-cn/problem/3sum/
