import math
N = int(input())
a = math.floor(N / 7)
b = N % 7
B = [b]

while a >= 7:
    b = a % 7
    B.append(b)
    a = math.floor(a / 7)

B.append(a)
s = ""
for i in range(1, len(B)+1):
  s += str(B[-i])
print(int(s))