import java.util.Scanner;
public static class{
public static void main(String[] args){
//键盘录入两个int类型的数据,交换这两个变量的值,并输出交换后的值
a = sc.nextInt();
b = sc.nextInt();
System.out.println(a);
System.out.println(b);
//方法一:借助第三个变量
int temp = a;
a = b;
b = temp;
System.out.println(a);
System.out.println(b);
//方法二:按位异或
a = a^b;
b = a^b;
a = a^b;
System.out.println(a);
System.out.println(b);
//方法三:运算,赋值
a=(a+b)-(a=b);
System.out.println(a);
System.out.println(b);
//方法四:模拟第三个变量(差)
//假设a是a,b中较大的值
a = a-b; //a2 = a1-b1(差) -1
b = b+a; //a3 = a1-b1-b1; 1
a = b-a;
System.out.println(a);
System.out.println(b);
}
}