[!WARNING|style:flat] This question is temporarily unanswered if you have good ideas. Welcome to Create Pull Request PR

Some items were changed in this to better suit running test cases. On leetcode, do not return a slice of string, but rather just modify the input.

Example 1:

Input: ["h","e","l","l","o"]
Output: ["o","l","l","e","h"]

...

... Reverse String

如果你同我一样热爱数据结构、算法、LeetCode，可以关注我 GitHub 上的 LeetCode 题解：awesome-golang-algorithm