Java Time Limit Exceeded issue

  • 0

    public class Solution {
    public String reverseString(String s) {
    String rs="";
    for (int i=s.length(); i>0;i--){
    rs=rs+s.substring(i-1, i);
    return rs;

    I don't know why my answer didn't work. The loop executes n times, thus it should be O(n), right? Anyone help me, thanks!

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