n=int(input())
if n<100:
    print(n//3-3)
else:
    e=len(str(n))-1
    s=[0,30,48,192,768,3072,12288,49152,196608,786432,3145728]
    m=0
    for i in range(e):
        m+=s[i]
    l=[int(i)//3+1 for i in list(str(n).strip())]
    l[0]-=1
    a=1
    for i in l:
        a*=i
    print(m+a)