import datetime
a=datetime.date(2015,1,1)
c=0
while a!=datetime.date(2016,1,1):
    s=str(a.day)
    if len(s)==1:
        if a.month==a.day:
            c+=1
    if len(s)==2:
        if a.month==(int(s[0])+int(s[1])):
            c+=1
    a+=datetime.timedelta(days=1)
   
print(c)