题解 | #回文对称数#

import java.util.Scanner;

public class Main {
    public boolean isPalindrome(int x) {
        int a = 0;
        int b = x;
        int sum = 0;
        if(b<0){
            return false;
        }
        while(b != 0){
            a = b%10;
            sum = sum*10 + a;
            b = b/10;
        }
        return sum==x;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        Main main = new Main();
        int a = in.nextInt();
        for(int i = 1; i<=a; i++){
            if(main.isPalindrome(i)){
                System.out.println(i);
            }

        }
    }
}