Reverse String
Easy
Two Pointers
String
Array
Write a function that reverses a string. The input string is given as an array of characters s. You must do this by modifying the input array in-place with O(1) extra memory.
Examples:
Input:
[["h","e","l","l","o"]]Output:
["o","l","l","e","h"]Input:
[["H","a","n","n","a","h"]]Output:
["h","a","n","n","a","H"]Constraints:
- 1 ≤ s.length ≤ 10⁵
- s[i] is a printable ascii character.
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