题解 | #数字颠倒#

import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter pw = new PrintWriter(System.out);

        String str = br.readLine();
        StringBuilder builder = new StringBuilder(str);
        builder.reverse();
        pw.println(builder.toString());

        pw.flush();
        pw.close();
        br.close();
    }
}