import calendar
dateList = []
for i in range(1, 13):
	first, date = calendar.monthrange(2015, i)
	dateList.append(date)

month = 0
happyDays = 0
for days in dateList:
    month += 1
    for date in range(1, days):
        if date < 10:
            if month == date:
                happyDays += 1
        else:
            if month == sum(map(int, str(date))):
				happyDays += 1

print happyDays