Fix

LokiSharp · web-flow · commit cbc9a8ca49f2 · 2017-01-21T21:15:16.000+08:00
diff --git a/5.mergeSort.md b/5.mergeSort.md
@@ -72,16 +72,15 @@ function merge(left, right)
 }
 ```
 
-## 4. Python 代码实现
+## 5. Python 代码实现
 
 ```python
 def mergeSort(arr):
     import math
     if(len(arr)<2):
         return arr
     middle = math.floor(len(arr)/2)
-    left = arr[0:middle]
-    right = arr[middle:]
+    left, right = arr[0:middle], arr[middle:]
     return merge(mergeSort(left), mergeSort(right))
 
 def merge(left,right):
