题解 | #数字颠倒#

import java.util.Scanner;
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s = "";
        while (s.length() == 0) {
            s = in.next();
        }
        char[] chars = s.toCharArray();
        for (int i = chars.length;i > 0; i --){
            System.out.print(chars[i-1]);
        }

    }
}