day = []
month = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
ans = 0
for i in range(31):
	zyu = int((i + 1) / 10)
	iti = i + 1 - zyu * 10
	sum = zyu + iti
	day.insert(i, (sum))
count = 1
for i in month:
	for j in range(i):
		if count == day[j]:
			ans += 1
	count += 1
print(ans)