calendar,ok={1:31,2:28,3:31,4:30,5:31,6:30,7:31,8:31,9:30,10:31,11:30,12:31},0
for key in calendar.keys():
    for i in range(1,calendar[key]+1):
        if key==sum(list(map(int,list(str(i))))):
            ok+=1
print(ok)