def part_one(input_file: str) -> int:
# read input file
inputs = read_input_blob(input_file)
# split groups and combine all group answers into a single line
groups = []
for line in inputs.split('\n\n'):
groups.append(line.replace('\n', ''))
# iterate through groups and count uniques
total_answer_counts = 0
for group in groups:
total_answer_counts += len(set(group))
return total_answer_counts
def part_two(input_file: str) -> int:
# read input file as blob
input_str = read_input_blob(input_file)
# split by mask and relevant mask instr, parse into masked instruction set objects
mask_split = input_str.split('mask = ')[1:]
masked_instr_sets = [
MaskedInstructionSet.from_input_str(input_str)
for input_str in mask_split
]
# instantiate computer system and run instruction sets
computer = ComputerSystem()
computer.run_address_masked_instruction_set(
instruction_sets=masked_instr_sets)
return computer.get_sum_of_mem_vals()
def part_one(input_file: str, required_fields: Set[str]) -> int:
# read input file
inputs = read_input_blob(input_file)
# parse raw input and marshal into Passport object
passports = []
for line in inputs.split('\n\n'):
passport = Passport.from_input_str(line.replace('\n', " "))
passports.append(passport)
# iterate through passports and count the number that are valid
total_valid = 0
for passport in passports:
if passport.has_valid_fields(required_fields=required_fields):
total_valid += 1
return total_valid
def part_one(input_file: str, last_turn: int) -> int:
# read input list
inputs = read_input_blob(input_file)
# part to form starting list
starting_list = [int(num) for num in inputs.split(',')]
# instantiate turn counter, last work and dict to keep track data about the number
# that was last said
turn = 0
last_spoken_num = None
previously_spoken = dict()
for num in starting_list:
turn += 1
last_spoken_num = num
previously_spoken[num] = NumberData(times_spoken=1, last_spoken=turn)
# follow rules based on last_spoken_num until we reach our turn limit
while turn != last_turn:
turn += 1
# if last spoken work was spoken for the first time then the cur num spoken
# is 0, otherwise it is the delta between the last spoken turn and the next to
# last spoken turn
if previously_spoken[last_spoken_num].times_spoken == 1:
cur_num = 0
else:
cur_num = previously_spoken[
last_spoken_num].last_spoken - previously_spoken[
last_spoken_num].next_to_last_spoken
# update the previously spoken dict with the current num
if cur_num not in previously_spoken:
previously_spoken[cur_num] = NumberData(times_spoken=1,
last_spoken=turn)
else:
previously_spoken[cur_num].times_spoken += 1
previously_spoken[cur_num].next_to_last_spoken = previously_spoken[
cur_num].last_spoken
previously_spoken[cur_num].last_spoken = turn
last_spoken_num = cur_num
return last_spoken_num
def part_two(input_file: str):
# read and parse input file
inputs = read_input_blob(input_file)
_, raw_buses = inputs.split('\n')
# process inputs and get diffs for crt
buses = [int(bus) if bus[0] != 'x' else 0 for bus in raw_buses.split(",")]
diffs = [bus - i for i, bus in enumerate(buses)]
# remove the 0s (formerly xs) from buses and difs
rel_buses = []
rel_diffs = []
for i, bus in enumerate(buses):
if bus > 0:
rel_buses.append(bus)
rel_diffs.append(diffs[i])
return chinese_remainder(rel_buses, rel_diffs)
def part_one(input_file: str):
# read and parse input file
inputs = read_input_blob(input_file)
raw_earliest_time, raw_potential_buses = inputs.split('\n')
# process inputs
earliest_time = int(raw_earliest_time)
potential_buses = [int(bus) for bus in raw_potential_buses.replace(',x', '').split(',')]
# for each bus get the closest time the bus departs from our earliest time and track min
min_wait_bus_id = 0
min_wait_time = float('inf')
for bus in potential_buses:
wait_time = math.ceil(earliest_time / bus) * bus - earliest_time
if wait_time < min_wait_time:
min_wait_time = wait_time
min_wait_bus_id = bus
return min_wait_bus_id * min_wait_time
def part_two(input_file: str) -> int:
# read input file
inputs = read_input_blob(input_file)
# split groups and then split each member for the group
groups = []
for line in inputs.split('\n\n'):
group = line.split('\n')
groups.append(group)
# iterate through groups and get the count of questions that
# were answered by all memebers, tracking total along the way
total_all_yes_counts = 0
for group in groups:
for question in group[0]:
if all([question in memember for memember in group]):
total_all_yes_counts += 1
return total_all_yes_counts
