# Copyright (c) 2019-present, Anon.
# All rights reserved.
#
# This source code is licensed under the license found in the
# LICENSE file in the root directory of this source tree.
#
def f_gold(n):
    i = 0
    j = len(n)
    pos = 0
    while (i < j):
        if (n[i] == '4'):
            pos = pos * 2 + 1
        if (n[i] == '7'):
            pos = pos * 2 + 2
        i = i + 1
    return pos


#TOFILL

if __name__ == '__main__':
    param = [
        ('7',),
        ('305745689',),
        ('444',),
        ('4',),
        ('2074',),
        ('27',),
        ('447',),
        ('255',),
        ('10000111111011',),
        ('fAKcSDRTNz',)
    ]
    n_success = 0
    for i, parameters_set in enumerate(param):
        if f_filled(*parameters_set) == f_gold(*parameters_set):
            n_success += 1
    print("#Results: %i, %i" % (n_success, len(param)))
