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.
+
Example 1:
+Input: s = ["h","e","l","l","o"] +Output: ["o","l","l","e","h"] +
Example 2:
+Input: s = ["H","a","n","n","a","h"] +Output: ["h","a","n","n","a","H"] ++
+
Constraints:
+ +1 <= s.length <= 105s[i] is a printable ascii character.