n = int(input())

i = 0
while True:
    if 7**i > n:
        break
    i += 1

i -= 1
if i < 0:
    i = 0

ans = ""
tmp = n
while True:
    m = 7**i
    ans += str(tmp // m)
    tmp = tmp % m
    i -= 1
    if i == -1:
        break

print(ans)