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Write a function that reverses a string. The input string is given as an array of characters s.


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"]




Follow up: Do not allocate extra space for another array. You must do this by modifying the input array in-place with O(1) extra memory.

class Solution { public void reverseString(char[] s) { } }