from datetime import datetime,timedelta
current = datetime(2015,1,1)
happy_day = 0
while True:
    month = current.month
    day = current.day
    digit10 = day // 10
    digit1 = day % 10
    current+=timedelta(1)
    if month == digit10 + digit1:
        happy_day+=1
    if month == 12 and day == 31:
        break
print(happy_day)