import java.util.Calendar;

public class No_188 {

	public static void main(String[] args) {
		Calendar calendar = Calendar.getInstance();
		calendar.set(2015, 0, 1);

		int year = calendar.get(Calendar.YEAR);
		int HAPPY_DAY = 0;

		while (year < 2016) {
			int month = calendar.get(Calendar.MONTH) + 1;
			int day = calendar.get(Calendar.DATE);

			if (plusDate(month, day)) {
				HAPPY_DAY++;
			}
			calendar.add(Calendar.DATE, 1);
			year = calendar.get(Calendar.YEAR);
		}
		System.out.println(HAPPY_DAY);

	}

	static boolean plusDate(int month, int day) {
		int plusDay = (day / 10) + (day % 10);
		return month == plusDay ? true : false;
	}

}