---

def tri(n):
    s = ""
    while n > 0:
        s = str(n % 3) + s
        n //= 3
    return s
R = int(input())
ans = 0
for n in range(1, 1000000):
    s = tri(n)
    if n % 3 == 0:
        res = "1" + s + "02"
    else:
        res = s + tri((n % 3) * 4)
    if int(res, 3) == R:
        ans += n
print(ans)