题解 | #数字颠倒#

import java.util.Scanner;
import java.util.Stack;

public class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        while(in.hasNext()){
            Stack sta = new Stack();
            int num = in.nextInt();
            String s = Integer.toString(num);
            for(int i = 0;i<s.length();i++){
                sta.push(s.charAt(i));
            }
            for(int j = 0;j<s.length();j++){
                System.out.print(sta.pop());
            }
        }
    }
}