题解 | #字符串反转#

import java.io.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        try {
            String s = br.readLine();
            char[] chars = s.toCharArray();
            for (int i = chars.length - 1; i >= 0; i--) {
                System.out.print(chars[i]);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}