package Course_Codes;

import java.util.Scanner;

//两数交换
public class 两数交换 {

	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		while(sc.hasNext()) {
			int a=sc.nextInt();
			int b=sc.nextInt();
			//异或思想
			a=a^b;
			b=a^b;
			a=a^b;
			System.out.print("a="+a+" b="+b);
		}
	}

}