题解 | #数字颠倒#

import java.io.*;
import java.util.*;


public class Main{
    public static void main(String [] args) throws Exception{
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        char [] str = bf.readLine().toCharArray();
        StringBuilder sb = new StringBuilder();
        for(int i = str.length-1;i>=0;i--){
            sb.append(str[i]);
        }
        System.out.println(sb.toString());
    }
}