#include <bits/stdc++.h>

 using namespace std;

 void my_swap (int* a,int* b) {

     cout<<*a<<" "<<*b<<endl;

     int *tmp=a;

     a=b; b=tmp;

     cout<<*a<<" "<<*b<<endl;

 int main ()

 {

     int a=,b=;

     my_swap(&a,&b);

     cout<<a<<endl;

     return ;

 }