#include <iostream>
#include <complex>
using namespace std;
int f1(int &y) {
y++; return y - 2;
}
int f2(int &z) {
z--; return z + 2;
}
void f3(int &x, int y, int z(int &x)) {
x += z(y);
cout << complex<double>(x++, y) << endl;
}
int main() {
int (*f[5])(int &x) = {f1, f2, f2, f1, f2};
int y(5), z(2);
for(int x = 0; x < 5; x++) f3(z, x, f[x]);
cout << z;
return 0;
}