#include <iostream>
#include <cstdlib>
#include <ctime>    //for the functions time and localtime
using namespace std;

int main()
{
        //Get the current hour of the day (0 to 23 inclusive).
        time_t t {time(nullptr)};
        tm *p {localtime(&t)};
        int hour {p->tm_hour};

	if (hour < 12) {
		cout << "Good morning.";
	} else if (hour < 12 + 5) {
		cout << "Good afternoon.";
	} else {
		cout << "Good evening.";
	}

	cout << "\n";
        return EXIT_SUCCESS;
}