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