344. Reverse String

 一刷 06/2022

Version #1 Two Pointers 06/2022

Time O(N)

Space O(1)

Runtime: 1 ms, faster than 99.71% of Java online submissions for Reverse String.

Memory Usage: 58.2 MB, less than 10.28% of Java online submissions for Reverse String.

class Solution {

    public void reverseString(char[] s) {

        int start = 0, end = s.length - 1;

        while (start < end) {

            char c = s[start];

            s[start] = s[end];

            s[end] = c;

            start++;

            end--;

        }

    }

}