import java.time.*;

public class Main {

    public static void main(String[] args) {
        LocalDate startDate = LocalDate.of(2000, 1, 1);
        LocalDate endDate = LocalDate.of(2020, 10, 1);

        int totalDistance = calculateTotalDistance(startDate, endDate);

        System.out.println(totalDistance);
    }

    public static int calculateTotalDistance(LocalDate startDate, LocalDate endDate) {
        int totalDistance = 0;
        LocalDate currentDate = startDate;

        while (!currentDate.isAfter(endDate)) {
            if (currentDate.getDayOfWeek().getValue() == 1 || currentDate.getDayOfMonth() == 1) {
                totalDistance += 2;
            } else {
                totalDistance += 1;
            }
            currentDate = currentDate.plusDays(1);
        }

        return totalDistance;
    }
}