#!/usr/bin/python3
import loader
import re
inp = loader.string_list("input_day14")
mask = ""
mem = {}
for line in inp:
if re.match('^mask', line):
mask = line.split(" = ")[1]
continue
match = re.match('mem\[([0-9]+)] = ([0-9]+)', line)
mem_addr = int(match.group(1))
raw_value = int(match.group(2))
raw_value_binary_string = "{:036b}".format(raw_value)
masked_value_binary_string = ""
for i in range(36):
if mask[i] != "X":
masked_value_binary_string += mask[i]
else:
masked_value_binary_string += raw_value_binary_string[i]
masked_value_int = int(masked_value_binary_string, 2)
mem[mem_addr] = masked_value_int
print(sum([mem[key] for key in mem.keys()]))
#!/usr/bin/python3
import loader
import logging
import re
#logging.basicConfig(level=logging.DEBUG)
valid_passport_required_keys = [
"byr", "iyr", "eyr", "hgt", "hcl", "ecl", "pid"
]
#"cid"]
passport_string_list = loader.string_list("input_day4")
all_passports = []
current_passport = {}
for line in passport_string_list:
logging.debug(f"Got line: {line}")
if line == "":
logging.debug(
f"Found blank line. Added {current_passport} to all_passports")
all_passports.append(current_passport)
current_passport = {}
continue
else:
field_data = line.split()
for field in field_data:
split_field = field.split(":")
current_passport[split_field[0]] = split_field[1]
#!/usr/bin/python3
import loader
boarding_passes = loader.string_list("input_day5")
def convert_pass_to_row_col(bpass):
row = int(bpass[0:7].replace("F", "0").replace("B", "1"), 2)
col = int(bpass[7:].replace("L", "0").replace("R", "1"), 2)
return {"row": row, "col": col, "id": row * 8 + col}
seat_ids = [convert_pass_to_row_col(bpass)["id"] for bpass in boarding_passes]
min_id = min(seat_ids)
max_id = max(seat_ids)
for seat_id in range(min_id, max_id):
if seat_id not in seat_ids:
print(seat_id)
exit(0)
#!/usr/bin/python3
import loader
inp = loader.string_list("input_day21")
foods = []
for raw_food_data in inp:
ingredients = raw_food_data.split(" (contains ")[0].split(" ")
allergens = raw_food_data.split(" (contains ")[1].rstrip(")").split(", ")
food = {"i": ingredients, "a": allergens}
foods.append(food)
all_ingredients = list()
all_allergens = list()
for food in foods:
all_ingredients += food["i"]
all_allergens += food["a"]
all_ingredients = set(all_ingredients)
all_allergens = set(all_allergens)
ingredients_x_allergens = set() # represents possible food-allergen pairings
for i in all_ingredients:
for a in all_allergens:
ingredients_x_allergens.add((i, a))
for food in foods:
for food_allergen in food["a"]:
impossible_ingredients = all_ingredients - set(food["i"])
for impossible_ingredient in impossible_ingredients:
"letter": matches.group(3),
"password": matches.group(4)
}
def is_password_valid(password_dict):
"""
Mandatory arguments:
* password_dict - a password dictionary a returned by parse_password_line
Returns True if the password is valid and False if it is not.
"""
letter_count = sum([
1 for letter in password_dict["password"]
if letter == password_dict["letter"]
])
if password_dict["minimum"] <= letter_count <= password_dict["maximum"]:
return True
else:
return False
password_lines = loader.string_list("input_day2")
password_dicts = [
parse_password_line(password_line) for password_line in password_lines
]
valid_password_count = sum([
1 for password_dict in password_dicts if is_password_valid(password_dict)
])
print(valid_password_count)
