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