#include <iostream>
using namespace std;
int main(void)
{
        int i=5;

        if(++i == i++)
                cout<<"first two are equal\n";
        else
                cout<<"first two are unequal\n";

        if(i++ == ++i)
                cout<<"second two are equal\n";
        else
                cout<<"second two are unequal\n";

        return 0;
}