using namespace std;
// write your code here......
void swap(int *p, int *q);
void swapp(int &a, int &b);
int main() {
int m, n;
cin >> m;
cin >> n;
// write your code here......
// swap(m,n); // 指针变量
swapp(m,n); //引用变量
cout << m << " " << n << endl;
return 0;
}
void swap(int *p, int *q)
{
int temp = *p;
*p = *q;
*q = temp;
}
void swapp(int &a, int &b)
{
int temp = a;
a = b;
b = temp;
}