import math
import sys

def resolve():
    nstr = input()
    length = len(nstr)
    n = int(nstr)

    if length == 2:
        print(n//3-3)
        return

    result = 30
    
    if length - 3 > 0:
        result += 16*(4**(length-3)-1)

    head = int(nstr[0])
    if head < 3:
        print(result)
        return
    elif head == 3:
        pass
    elif head < 6:
        result += 4**(length-1)
        print(result)
        return
    elif head == 6:
        result += 4**(length-1)
    elif head < 9:
        result += 2 * 4**(length-1)
        print(result)
        return
    else:
        result += 2 * 4**(length-1)

    tmp = 1
    for c in nstr[1:]:
        if int(c) < 3:
            continue
        elif int(c) < 6:
            tmp *= 2
        elif int(c) < 9:
            tmp *= 3
        else:
            tmp *= 4

    result += tmp
    print(result)

resolve()