Java(submit result is TLE)Anyone can help me?哪位中国大佬帮忙看看

  • 0

    i don't know why my codes can't be submited?
    the submit result is Time Limit Exceeded(TLE).

    class Solution {
    public String reverseString(String s) {
    String r = "";
    for(int i = s.length(); i > 0; i--){
    r += s.toCharArray()[i-1];
    return r;

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