Update combinations.py

yingl · web-flow · commit fbdde2c961d0 · 2017-04-25T18:41:44.000+08:00
diff --git a/combinations.py b/combinations.py
@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# coding: utf-8
 
 class Solution:
     """    
@@ -31,4 +31,6 @@ def dfs(self, list, pos, k):
                         new_comb = [list[i]]
                         new_comb.extend(comb)
                         ret.append(new_comb)
-            return ret
+            return ret
+
+# medium: http://lintcode.com/zh-cn/problem/combinations/
