import java.time.LocalDate;
import java.util.Scanner;

public class No188 {
    public static void main(String[] args) {
        LocalDate targetDate = LocalDate.of(2015, 1, 1);
        LocalDate endDate = LocalDate.of(2016, 1, 1);

        int ans = 0;
        while (targetDate.isBefore(endDate)) {
            int month = targetDate.getMonth().getValue();
            int day = targetDate.getDayOfMonth();
            if (month == (day/10 + day%10)) {
                ans++;
            }
            targetDate = targetDate.plusDays(1);
        }

        System.out.println(ans);
    }
}