import java.time.LocalDate;

public class HappyDay {

	public static void main(String[] args) {
		LocalDate ld = LocalDate.of(2015, 1, 1);
		int count = 0;
		while(ld.getYear() == 2015){
			int X = ld.getMonthValue() , Y = ld.getDayOfMonth();
			if(X == Y/10 + Y%10)
				count++;
			ld = ld.plusDays(1);
		}
		System.out.println(count);

	}

}