year = {1:31,2:27,3:31,4:20,5:31,6:30,7:31,8:31,9:30,10:31,11:30,12:31}
count = 0
for month in year.keys():
    for day in range(1,year[month]+1):
        if month == day//10 + day%10 :
            count = count + 1
print(count)