modify README

Author: andavid

README.md

@@ -2,11 +2,6 @@
 
 [LeetCode][leetcode-problems] solutions written in Java.
 
-## 参考
-
-* https://leetcode.wang
-* https://github.com/Blankj/awesome-java-leetcode
-
 ## 说明
 
 * vscode 目录是 Java 实现代码。所有代码均通过 VS Code 的 [LeetCode 插件][vscode-leetcode-plugin] 进行编写、测试，并且提交通过。
@@ -15,10 +10,9 @@
 
 ## 题目集合
 
-* [LeetCode 官方精选的经典面试问题列表(Easy)][top-interview-questions-easy]
+* [LeetCode 官方精选的面试问题列表(Easy)](./card/top-interview-questions-easy.md)
 
 
 [leetcode-problems]: https://leetcode.com/problemset/all/
 [vscode-leetcode-plugin]: https://marketplace.visualstudio.com/items?itemName=shengchen.vscode-leetcode
-[top-interview-questions-easy]: https://github.com/andavid/leetcode-java/blob/master/card/top-interview-questions-easy.md