344. Reverse String
https://leetcode.com/problems/reverse-string/
Write a function that reverses a string. The input string is given as an array of characters
char[].
Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory.
You may assume all the characters consist of printable ascii characters.
Example 1:
Input: ["h","e","l","l","o"] Output: ["o","l","l","e","h"]
Example 2:
Input: ["H","a","n","n","a","h"] Output: ["h","a","n","n","a","H"]
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| class Solution { | |
| public void reverseString(char[] s) { | |
| for (int i = 0; i < s.length / 2; i++) { | |
| char temp = s[i]; | |
| s[i] = s[s.length - i - 1]; | |
| s[s.length - i - 1] = temp; | |
| } | |
| } | |
| } |
