a = 0
for i in [1,3,5,7,8,10,12]:
	for j in range(1,32):
		if( i == j%10 + int(j/10) ):
			a += 1

for i in [4,6,9,11]:
	for j in range(1,31):
		if( i == j%10 + int(j/10) ):
			a += 1

for j in range(1,29):
	if( 2 == j%10 + int(j/10) ):
		a += 1

print(a)