import java.time.LocalDate;

public class Main {
    public static void main(String... args) {
        int count = 0;
        for (LocalDate date = LocalDate.of(2015, 1, 1);
             date.isBefore(LocalDate.of(2016, 1, 1));
             date = date.plusDays(1L)) {
            int day = date.getDayOfMonth();
            if (date.getMonthValue() == day / 10 + day % 10) {
                count++;
            }
        }
        System.out.println(count);
    }
}