from datetime import datetime, timedelta

count = datetime(2015, 1, 1)
last_day = datetime(2015, 12, 31)

counter = 0
while count <= last_day:
    day_str = str(count.day)
    place_of_one = int(day_str[0])
    tens_place = int(day_str[1]) if count.day >= 10 else 0
    if place_of_one + tens_place == count.month:
        # HAPPY DAY!
        counter += 1
    count += timedelta(days=1)

print(counter)