# your code goes here
N=int(input())
Se=7
i=0
while N>=Se:
    Se*=7
Se//=7
Ns=[]
while N>=1:
    Ns.append(N//Se)
  #      print (Se)
    N%=Se
    Se//=7
if N==0:
    Ns.append(0)
Nst=[str(i) for i in Ns]
Nj="".join(Nst)
print (Nj)