import math

N = int(input())

if N == 0:
    print(0)
    exit()

#
ans = ''
m = int(math.log(N, 7) + 1)

for i in range(m, -1, -1):
    ans += str(N // (7**i))
    N %= 7**i

if ans.startswith('0'):
    print(ans[1:])
else:
    print(ans)