import datetime
dt = datetime.datetime(2015, 1, 1)

happyday_cnt = 0
for i in range(365):
    nday = datetime.timedelta(days=i)
    after = dt + nday
    day_str = "%02d" % after.day
    day_sum_int = int(day_str[0]) + int(day_str[1])
    if day_sum_int == after.month:
        happyday_cnt += 1

print(happyday_cnt)