tidy readme

Author: jackzhenguo

README.md

@@ -1,4 +1,4 @@
-Important Notes </br>
+## Important Notes </br>
 I would not write coding in an single file of this repository, so you can visit solutions by two methonds. One is by my [Blog Column](http://blog.csdn.net/column/details/14761.html), and another direct way is by questions index.
 
 ## About it
@@ -93,7 +93,7 @@ Anyway, welcome to view, star and fork, then contribute.
 |242|HashTable;|[Valid Anagram](http://blog.csdn.net/daigualu/article/details/71358552)|
 |257|Tree;|[Binary Tree Paths](http://blog.csdn.net/daigualu/article/details/70340125)|
 |258|Math;|[Add Digits]()|
-|263|Math;|[Ugly Number Ugly Number](http://blog.csdn.net/daigualu/article/details/72765438)|
+|263|Math;|[Ugly Number](http://blog.csdn.net/daigualu/article/details/72765438)|
 |268|Array;Math;|[Missing Number](http://blog.csdn.net/daigualu/article/details/69220202)|
 |278|BinarySearch;|[First Bad Version](http://blog.csdn.net/daigualu/article/details/69802371)|
 |283|Array;TwoPointers;|[Move Zeroes](http://blog.csdn.net/daigualu/article/details/69329038)|
@@ -146,3 +146,4 @@ Anyway, welcome to view, star and fork, then contribute.
 |566|Array;|[Reshape the Matrix](http://blog.csdn.net/daigualu/article/details/71275325)|
 |572|Tree;|[Subtree of Another Tree](http://blog.csdn.net/daigualu/article/details/71908238)|
 |575|HashTable;|[Distribute Candies](http://blog.csdn.net/daigualu/article/details/71625170)|
+