反转字符串
Easy
two-pointers
string
编写一个函数，其作用是将输入的字符串反转过来。输入字符串以字符数组 s 的形式给出。
不要给另外的数组分配额外的空间，你必须原地修改输入数组、使用 O(1) 的额外空间解决这一问题。
示例 1：
输入：s = ["h","e","l","l","o"]
输出：["o","l","l","e","h"]
示例 2：
输入：s = ["H","a","n","n","a","h"]
输出：["h","a","n","n","a","H"]
提示：
- 1 <= s.length <= 10^5
- s[i] 都是 ASCII 码表中的可打印字符
Sample Test Cases
Example 1
Input:
["h","e","l","l","o"]
Expected Output:
["o","l","l","e","h"]
Example 2
Input:
["H","a","n","n","a","h"]
Expected Output:
["h","a","n","n","a","H"]
Keyboard shortcuts:
- • Ctrl/Cmd + Enter to submit
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