题解 | #交换变量值#

import java.util.Scanner;

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

        //write your code here.......
        a=a^b;
        b=a^b;//a^b^b=a^0=a;
        a=a^b;//a^b^(a^b)^b=b;


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