def check_happy(M,D):

	return M == D // 10 + D % 10


Y = 2015
cnt = 0

if Y % 4 == 0 and Y % 100 != 0:
	lim = {1:31,2:29,3:31,4:30,5:31,6:30,7:31,8:31,9:30,10:31,11:30,12:31}	

elif Y % 100 == 0 and Y % 400 != 0:
	lim = {1:31,2:28,3:31,4:30,5:31,6:30,7:31,8:31,9:30,10:31,11:30,12:31}		
else:
	lim = {1:31,2:29,3:31,4:30,5:31,6:30,7:31,8:31,9:30,10:31,11:30,12:31}	

for M in lim:
	for D in range(1,lim[M]+1):
		if check_happy(M,D):
			cnt += 1

print(cnt)