题解 | #一大一小# (异或运算)

import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int a = scan.nextInt();
        int b = scan.nextInt();
        a = a ^ b;
        b = a ^ b;
        a = a ^ b;
        System.out.println(a);
        System.out.println(b);
    }
}