import sys
import datetime


def date_range(start: datetime.date, end: datetime.date) -> datetime.date:
    one_day = datetime.timedelta(days=1)
    d = start
    while d <= end:
        yield d
        d += one_day


def is_happy_day(d: datetime.date) -> bool:
    x = d.month
    y = 0
    day = d.day
    while day > 0:
        day, z = divmod(day, 10)
        y += z
    return x == y


def resolve(in_):
    start = datetime.datetime(2015, 1, 1)
    end = datetime.datetime(2015, 12, 31)

    ans = sum(1 for _ in filter(is_happy_day, date_range(start, end)))
    return ans


def main():
    ans = resolve(sys.stdin.buffer)
    print(ans)


if __name__ == '__main__':
    main()