#include <iostream>
using namespace std;

void zamenjaj(int &x, int &y) {
    int zac = x;
    x = y;
    y = zac;
}

int main(){
    int a,b;
    cout << "Vnesi dve celi stevili: "; cin >> a >> b;
    cout << "Pred zamenjavo: \n a = " << a << " b = " << b << endl;
    zamenjaj(a,b);
    cout << "Po zamenjavi: \n a = " << a << " b = " << b << endl;
}