题解 | #23年OPPO-a的翻转#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        Integer a = in.nextInt();
        String s = a.toString();
        char[] c = s.toCharArray();
        StringBuilder sb = new StringBuilder();
        for(int i=c.length-1;i>=0;i--){
            sb.append(c[i]);
        }
        int y = Integer.parseInt(sb.toString());
        System.out.println(a+y);
    }
}