import datetime 

date = datetime.datetime(2015, 1, 1, 0, 0)
until = datetime.datetime(2016, 1, 1, 0, 0)

ans = 0
while date < until:
    str_date = date.strftime("%m %d")
    m, d = str_date.split()
    m, d = int(m[0]) + int(m[1]), int(d[0]) + int(d[1])
    if m == d:
        ans += 1
    date += datetime.timedelta(day=1)
print(ans)