from datetime import date, timedelta
d1 = date(2015,1,1)
d2 = date(2015,12,31)
c=0
for i in range((d2 - d1).days + 1):
    date = d1 + timedelta(i)
    m=date.month
    d=date.day
    if m==d//10+d%10:
        c+=1
print(c)