import calendar

HappyDayNum=0

for x in xrange(1,13):
	A=calendar.monthrange(2015,x)[1]
	for y in xrange(1,A+1):
		B=map(int,str(y))
		C=sum(B)
		if C==x:
			HappyDayNum+=1
		
print HappyDayNum