题解 | #提取不重复的整数#

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int m = sc.nextInt();
        String str = m+"";
        StringBuffer sb = new StringBuffer();
        for (int i = str.length()-1;i>=0;i--){
            sb.append(str.charAt(i));
        }
        System.out.println(sb.toString());
    }
}