#include <iostream>
using namespace std;

// write your code here......
void swap_int(int *p,int *q)
{
    int temp=*p;
    *p=*q;
    *q=temp;
}

int main() {

    int m, n;
    cin >> m;
    cin >> n;

    // write your code here......
    swap_int(&m,&n);//传入地址

    cout << m << " " << n << endl;

    return 0;
}