import java.util.Calendar;

public class No188 {

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

		Calendar clend = Calendar.getInstance();
		clend.set(2016, 1, 1);

		int count = 0;
		while (clnow.compareTo(clend) < 0) {
			String[] arr = String.valueOf(clnow.get(Calendar.DATE)).split("");

			int sumDay = 0;
			for (String s : arr) {
				sumDay += Integer.parseInt(s);
			}

			if (clnow.get(Calendar.MONTH) == sumDay) {
				count++;
			}

			clnow.add(Calendar.DAY_OF_MONTH, 1);
		}

		System.out.println(count);

	}

}