monthDay = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
count = 0
for i, Day in enumerate(monthDay):
	for day in range(Day):
		listDay = list(str(day+1))
		listDayInt = [int(num) for num in listDay]
		if i+1 == sum(listDayInt):
			count += 1
print(count)