def __brute_force(key, target):
""" Brute-force the lowest value of `n` for which the md5 hash of `secret_key{n}` starts with
the specified target value. """
md5_startswith_target = lambda k: md5(k).hexdigest().startswith(target)
for n in int_stream():
if md5_startswith_target((key + str(n)).encode()):
return n
def part_one(door_id):
print('\nHacking door #1 password...')
door_password = ''
for index in int_stream(0):
if (hash := _md5(door_id + str(index))).startswith('00000'):
door_password += hash[5]
print(door_password)
if len(door_password) == 8:
print('') # to make the "hacking" look nicer in the terminal
return door_password
def part_two(door_id):
print('\nHacking door #2 password...')
door_password = list('________')
for index in int_stream(0):
if (hash := _md5(door_id + str(index))).startswith('00000'):
try:
position = int(hash[5])
char_value = hash[6]
if position <= 7 and door_password[position] == '_':
door_password[position] = char_value
print(''.join(door_password))
except ValueError:
continue
if not '_' in door_password:
print('') # to make the "hacking" look nicer in the terminal
return ''.join(door_password)
def part_two(target_present_count):
for n in int_stream():
if __get_presents_for_house_with_lazy_elves(n) >= target_present_count:
return n
def part_one(target_present_count):
for n in int_stream():
if __get_presents_for_house(n) >= target_present_count:
return n
def _diagonal_coords_stream():
for target_sum in int_stream(2):
for y in int_stream(1, target_sum-1):
yield (target_sum - y, y)