import datetime


def calc(u):
    res = 0
    while u > 0:
        res += u % 10
        u = u // 10
    return res


s = datetime.datetime(2015, 1, 1)

res = 0
while s.year == 2015:
    if calc(s.day) == s.month:
        res += 1
    s = s + datetime.timedelta(days=1)

print(res)