题解 | #交换变量值#

import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);

        int a = in.nextInt();
        int b = in.nextInt();

        a = a ^ b;
        b = a ^ b;
        a = a ^ b;

        System.out.println(a + " " + b);
    }
}