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 );//在运算过程中将a的指赋给b，妙！实在是妙！

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