Update tag info in readme

Author: gavinfish

README.md

@@ -3,7 +3,7 @@
 [![Language](https://img.shields.io/badge/python-3.5-blue.svg)](https://www.python.org)
 [![License](https://img.shields.io/dub/l/vibe-d.svg)](https://opensource.org/licenses/MIT)
 
-This repository shares my leetcode problems solving experience. The first edition is written in Python3, and now I am working on resolving them with Java8. There are articles describing the solution. For further information, please see the Articles part.
+This repository shares my experience in solving leetcode problems. The first edition was written in Python3, and now I am working on resolving them with Java8. There are articles describing the solution. For further information, please see the Articles part.
 
 ## Problems
 
@@ -13,6 +13,10 @@ You can find all the problems on [LeetCode](https://leetcode.com).
 
 You are welcome if you have any question or suggestion.
 
+## Tag
+
+I have classified the problems into different tags like the leetcode OJ does. You can check them [here](./TAG.md).
+
 ## Articles
 
 There are articles about each problem, describing how I solve that problem. You can visit them on [GitBook](https://shenjie1993.gitbooks.io/leetcode-python/content/) or [CSDN](http://blog.csdn.net/column/details/leetcode-python.html).