import java.util.Calendar;
import java.util.GregorianCalendar;
public class Main {
public static void main(String[] args) {
Calendar cal = new GregorianCalendar(1999, 1, 1);
Calendar now = new GregorianCalendar();
int res = now.get(Calendar.YEAR) - cal.get(Calendar.YEAR);
if ((cal.get(Calendar.MONTH) > now.get(Calendar.MONTH))
|| (cal.get(Calendar.MONTH) == now.get(Calendar.MONTH) && cal.get(Calendar.DAY_OF_MONTH) > now
.get(Calendar.DAY_OF_MONTH))) {
res--;
}
System.out.println(res);
}
}