Pretty README.md

Author: beyondyyh

algorithms/README.md

@@ -1,6 +1,6 @@
 # Algorithms
 
-| No. | Title | Go | Difficulty |
+| No. | Title | Go | <span id="Top">Difficulty</span> |
 |-----| ----- | -- | ---------- |
 |0001|[两数之和](https://leetcode-cn.com/problems/two-sum/)|[go](./myarray/1.twoSum.go)|<font color="#009975">S</font>|
 |0002|[两数相加](https://leetcode-cn.com/problems/add-two-numbers/)|[go](./linkedList/2.addTwoNumbers.go)|<font color="#ed7336">M</font>|
@@ -60,3 +60,4 @@
 |1021|[删除最外层的括号](https://leetcode-cn.com/problems/remove-outermost-parentheses/)|[go](./mystack/1021.removeOuterParentheses.go)|S|
 |1108|[地址无效化](https://leetcode-cn.com/problems/defanging-an-ip-address/)|[go](./mystring/1108.defangIPaddr.go)|S|
 |1213|[三个有序数组的交集](https://leetcode-cn.com/problems/intersection-of-three-sorted-arrays/)|[go](./myarray/1213.arraysIntersection.go)|S|
+||||[:top:](#Top)|