happyday = 0
for month in range(1,12+1):
	if month in [2, 4, 6, 9, 11]:
		days = 30
	else:
		days = 31
	for day in range(1, days+1):
		sum = 0
		for digit in range(len(str(day))):
			sum += int(str(day)[digit])
		if month == sum:
			happyday += 1
print(happyday)