...he string reversed. Example Given s = hello, return olleh. Solution 1. Two-Pointer --3ms public class Solution { public String reverseString(String s) { char[] str = s.toCharArray(); ...
... stack.push(i); } } return res; } } 2. Two-Pointer public class Solution { public int trap(int[] A) { int left = 0, right = A.length-1, res = 0; ...
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