题解 | #数字颠倒#

import java.util.Scanner;

// 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) {
        Scanner input = new Scanner(System.in);
        String next = input.next();
        StringBuilder stringBuilder = new StringBuilder(next);
        StringBuilder reverse = stringBuilder.reverse();
        System.out.println(reverse.toString());
    }
}