def part_one(): target_weight = sum(data) // 3 largest = max(data) for x in range(largest ) print(target_weight) return def part_two(): return if __name__ == '__main__': run_with_timer(part_one) # run_with_timer(part_two) #
dist = float('inf') if is_min else float('-inf')
curr_dist = 0
for next_city in city_map[start_city]:
if next_city not in visited_cities:
curr_dist = city_map[start_city][next_city] + traverse_map(
city_map, next_city, visited_cities.copy(), is_min)
if (is_min and curr_dist < dist) or (not is_min
and curr_dist > dist):
dist = curr_dist
return dist if curr_dist > 0 else 0
def part_one():
city_map = build_city_graph()
return min(
traverse_map(city_map, start_city, [], True)
for start_city in city_map)
def part_two():
city_map = build_city_graph()
return max(
traverse_map(city_map, start_city, [], False)
for start_city in city_map)
if __name__ == '__main__':
run_with_timer(part_one) # 251 -- took 208 ms
run_with_timer(part_two) # 898 -- took 197 ms
for _ in range(num_phases):
result[-1] = input_signal[-1]
for j in range(len(input_signal) - 2, len(input_signal) // 2, -1):
result[j] = (input_signal[j] + result[j + 1]) % 10
input_signal = list(result)
result = [0] * len(input_signal)
return int(''.join(str(x) for x in input_signal[offset:offset + 8]))
def calculate_output_value(input_signal, row_num):
if row_num >= len(input_signal) // 2:
return abs(sum(int(x) for x in input_signal[row_num - len(input_signal):])) % 10
else:
i = row_num
total = 0
multiplier = 1
while i < len(input_signal):
for j in range(row_num + 1):
if i + j < len(input_signal):
total += input_signal[i + j] * multiplier
else:
break
i += 2 * (row_num + 1)
multiplier *= -1
return abs(total) % 10
if __name__ == '__main__':
run_with_timer(part_one) # 58100105
run_with_timer(part_two) # 41781287
def part_one():
molecule, molmap = get_data_as_molecule_map()
return replacement_step(molecule, molmap)
def f(start, target, molmap, depth):
if len(start) > len(target):
return None
elif start == target:
return depth
curr_min = 999999999
for i in range(len(start)):
for j in molmap[start[i]]:
next_val = f(start[:i] + j + start[i + 1:], target, molmap,
depth + 1)
if next_val:
curr_min = min(curr_min, next_val)
return curr_min
def part_two():
molecule = get_elems(data[-1])
molmap = get_data_as_molecule_map()
if __name__ == '__main__':
run_with_timer(part_one) # 509 -- took 0 ms
run_with_timer(part_two) #
for y_init in range(yrange, -yrange, -1):
y = 0
x = 0
curr_x_velocity = x_init
curr_y_velocity = y_init
while y >= region["ye"] and x <= region["xe"]:
if curr_x_velocity == 0 and x < region["xs"]:
break
x += curr_x_velocity
y += curr_y_velocity
if region["xs"] <= x <= region["xe"] and region["ys"] >= y >= region["ye"]:
valid_coords.append({"x": x_init, "y": y_init})
break
curr_y_velocity -= 1
curr_x_velocity -= 1 if curr_x_velocity > 0 else 0
return valid_coords
def part_one():
maxy = int(abs(region["ye"]))-1
return maxy * (maxy + 1) // 2
def part_two():
return len(get_valid_initial_velocities())
if __name__ == '__main__':
run_with_timer(part_one) # 12561 -- took 0 ms
run_with_timer(part_two) # 3785 -- took 90 ms
card_public_key, door_public_key = [
int(x.strip()) for x in open("input.txt").readlines()
]
def transform_val(val, subject_number):
return (val * subject_number) % 20201227
def part_one():
subject_number = 7
door_loop_size = 0
val = 1
while val != door_public_key:
val = transform_val(val, subject_number)
door_loop_size += 1
val = 1
for _ in range(door_loop_size):
val = transform_val(val, card_public_key)
return val
def part_two():
return 0
if __name__ == '__main__':
run_with_timer(part_one) # 18329280 -- took 4313 ms
run_with_timer(part_two) # 0 -- took 0 ms
start = [int(x) for x in vent[0].split(',')]
end = [int(x) for x in vent[1].split(',')]
if start[0] == end[0]:
for x in range(min(start[1], end[1]), max(start[1], end[1]) + 1):
floor_map[start[0]][x] += 1
elif start[1] == end[1]:
for x in range(min(start[0], end[0]), max(start[0], end[0]) + 1):
floor_map[x][start[1]] += 1
elif include_diagonals:
xdir = -1 if start[0] > end[0] else 1
ydir = -1 if start[1] > end[1] else 1
for x in range(abs(start[0] - end[0]) + 1):
floor_map[start[0] + (xdir * x)][start[1] + (ydir * x)] += 1
return floor_map
def part_one():
floor_map = mark_vents(False)
return sum(1 for x in floor_map for y in x if y > 1)
def part_two():
floor_map = mark_vents(True)
return sum(1 for x in floor_map for y in x if y > 1)
if __name__ == '__main__':
run_with_timer(part_one) # 7468 -- took 57 ms
run_with_timer(part_two) # 22364 -- took 76 ms
curr_count = 0
new_str = ''
for x in input_val:
if int(x) != last_num:
if curr_count > 0:
new_str += str(curr_count) + str(last_num)
last_num = int(x)
curr_count = 0
curr_count += 1
new_str += str(curr_count) + str(last_num)
return new_str
def part_one():
new_val = data
for x in range(40):
new_val = look_and_say(new_val)
return len(new_val)
def part_two():
new_val = data
for x in range(50):
new_val = look_and_say(new_val)
return len(new_val)
if __name__ == '__main__':
run_with_timer(part_one) # 492982 -- took 1248 ms
run_with_timer(part_two) # 6989950 -- took 22484 ms
"die": 1,
"turn": 1,
"p1": {
"num": 1,
"score": 0,
"pos": data[0]
},
"p2": {
"num": 2,
"score": 0,
"pos": data[1]
}
}
while state["p1"]["score"] < 1000 and state["p2"]["score"] < 1000:
make_move(state, deterministic_die)
return min(state["p1"]["score"], state["p2"]["score"]) * (
(state["turn"] - 1) * 3)
def part_two():
# state = {"die": 1, "turn": 1, "p1": {"num": 1, "score": 0, "pos": data[0]}, "p2": {"num": 2, "score": 0, "pos": data[1]}}
# while state["p1"]["score"] < 1000 and state["p2"]["score"] < 1000:
# make_move(state, deterministic_die)
# return min(state["p1"]["score"], state["p2"]["score"]) * ((state["turn"]-1)*3)
return
if __name__ == '__main__':
run_with_timer(part_one) # 512442 -- took 0 ms
run_with_timer(part_two) #
def get_next_pass(initial): pw = increment(initial) is_valid = check_pw(pw) while not is_valid: if 'i' in pw: pw = short_cut(pw, 'i') elif 'l' in pw: pw = short_cut(pw, 'l') elif 'o' in pw: pw = short_cut(pw, 'o') else: pw = increment(pw) is_valid = check_pw(pw) return pw def part_one(): return get_next_pass(data) def part_two(): initial = get_next_pass(data) return get_next_pass(initial) if __name__ == '__main__': run_with_timer(part_one) # hepxxyzz -- took 2388 ms run_with_timer(part_two) # heqaabcc -- took 8270 ms
flashed_points.add(p)
for neighbor in p.get_neighbors():
neighbor.set_value(neighbor.get_value() + 1)
if neighbor.get_value() > 9 and neighbor not in flashed_points:
increment_and_flash_neighbors(neighbor, flashed_points)
def part_one():
m = Grid(values=data)
m.set_neighbors_for_all(True)
return sum(take_step(m) for _ in range(1, 101))
def part_two():
m = Grid(values=data)
m.set_neighbors_for_all(True)
i = 0
while not sum(
1 for row in range(m.get_height())
if len(list(filter(lambda x: x.get_value() != 0, m.get_row(
row)))) != 0) == 0:
take_step(m)
i += 1
return i
if __name__ == '__main__':
run_with_timer(part_one) # 1675 -- took 46 ms
run_with_timer(part_two) # 515 -- took 206 ms
return rem_str, v_total, sum(literals) elif type_id == 1: return rem_str, v_total, math.prod(literals) elif type_id == 2: return rem_str, v_total, min(literals) elif type_id == 3: return rem_str, v_total, max(literals) elif type_id == 5: return rem_str, v_total, 1 if literals[0] > literals[1] else 0 elif type_id == 6: return rem_str, v_total, 1 if literals[0] < literals[1] else 0 elif type_id == 7: return rem_str, v_total, 1 if literals[0] == literals[1] else 0 def convert_hex_to_bin_str(hex_str): return "".join(bin(int(x, 16))[2:].zfill(4) for x in list(hex_str)) def part_one(): return parse_packet(convert_hex_to_bin_str(data))[1] def part_two(): return parse_packet(convert_hex_to_bin_str(data))[2] if __name__ == '__main__': run_with_timer(part_one) # 852 -- took 1 ms run_with_timer(part_two) # 19348959966392 -- took 0 ms
for prop in ticker.keys():
if prop in sue.keys() and ticker[prop] != sue[prop]:
match_found = False
if match_found:
return sues.index(sue) + 1
return
def part_two():
sues = get_sues_list()
for sue in sues:
match_found = True
for prop in ticker.keys():
if prop in sue.keys():
if prop in ('cats', 'trees'):
if ticker[prop] >= sue[prop]:
match_found = False
elif prop in ('pomeranians', 'goldfish'):
if ticker[prop] <= sue[prop]:
match_found = False
elif ticker[prop] != sue[prop]:
match_found = False
if match_found:
return sues.index(sue) + 1
return
if __name__ == '__main__':
run_with_timer(part_one) # 40 -- took 2 ms
run_with_timer(part_two) # 241 -- took 1 ms
def part_one():
bag_map = get_bag_map()
changed = True
initial_bag_set = set()
initial_bag_set.add('shiny gold')
while changed:
changed = False
initial_size = len(initial_bag_set)
for k, v in bag_map.items():
for bag in bag_map[k].keys():
if bag in initial_bag_set:
initial_bag_set.add(k)
if len(initial_bag_set) > initial_size:
changed = True
initial_bag_set.remove('shiny gold')
return len(initial_bag_set)
def count_bags(bag_map, bag):
return 1 + sum(v * count_bags(bag_map, k) for k, v in bag_map[bag].items())
def part_two():
return count_bags(get_bag_map(), 'shiny gold') - 1
if __name__ == '__main__':
run_with_timer(part_one) # 185 -- took 2 ms
run_with_timer(part_two) # 89084 -- took 2 ms
points_to_switch = []
for point in points_to_check:
neighbors = f(seat_map, point[0], point[1])
if not int(seat_map[point[0]][point[1]]) and not any(neighbors):
points_to_switch.append(point)
elif int(seat_map[point[0]][
point[1]]) and sum(neighbors) >= neighbor_count:
points_to_switch.append(point)
for point in points_to_switch:
seat_map[point[0]][point[1]] = (int(seat_map[point[0]][point[1]]) +
1) % 2
if len(points_to_switch) == 0:
break
return sum(x for x in seat_map)
def part_one():
return run_until_equillibrium(get_immediate_neighbors,
[list(x) for x in data], 4)
def part_two():
return run_until_equillibrium(get_distanced_neighbors,
[list(x) for x in data], 5)
if __name__ == '__main__':
run_with_timer(part_one) # 2319 -- took 2077 ms
run_with_timer(part_two) # 2117 -- took 17833 ms
from aoc_utils import run_with_timer
# data will be a list of each line stored as a list in this order: [min, max, letter, password]
data = [[int(y[0].split('-')[0]),
int(y[0].split('-')[1]), y[1][:-1], y[2]]
for y in [x.split() for x in open("input.txt").readlines()]]
def part_one():
return sum(1 for x in data if x[0] <= x[3].count(x[2]) <= x[1])
def part_two():
return sum(1 for x in data
if (x[3][x[0] - 1] == x[2]) ^ (x[3][x[1] - 1] == x[2]))
if __name__ == '__main__':
run_with_timer(part_one) # 580 -- took 0 ms
run_with_timer(part_two) # 611 -- took 0 ms
if not date_match.match(f['iyr']) or not int(f['iyr']) in range(
2010, 2021):
return False
if not date_match.match(f['eyr']) or not int(f['eyr']) in range(
2020, 2031):
return False
if not hgt_match.match(f['hgt']) or ('cm' in f['hgt'] and int(
f['hgt'][:-2]) not in range(150, 194)) or (
'in' in f['hgt'] and int(f['hgt'][:-2]) not in range(59, 77)):
return False
if not hex_match.match(f['hcl']):
return False
if f['ecl'] not in ['amb', 'blu', 'brn', 'gry', 'grn', 'hzl', 'oth']:
return False
if not pid_match.match(f['pid']):
return False
return True
def part_one():
return sum(1 for x in data if validate_presence(x))
def part_two():
return sum(1 for x in data if validate_presence(x) and validate_data(x))
if __name__ == '__main__':
run_with_timer(part_one) # 170 -- took 0 ms
run_with_timer(part_two) # 103 -- took 1 ms
(y.islower() and y not in current_path), m[x]))
else:
for x in m:
if last_node in m[x]:
m[x].remove(last_node)
if len(m[last_node]) > 0:
for x in m[last_node]:
next_path = current_path.copy()
next_path.append(x)
count_ways_to_node(copy.deepcopy(m), next_path, full_paths,
second_visit)
def part_one():
m = build_map()
full_paths = set()
count_ways_to_node(copy.deepcopy(m), ['start'], full_paths, True)
return len(full_paths)
def part_two():
m = build_map()
full_paths = set()
count_ways_to_node(copy.deepcopy(m), ['start'], full_paths, False)
return len(full_paths)
if __name__ == '__main__':
run_with_timer(part_one) # 5252 -- took 433 ms
run_with_timer(part_two) # 147784 -- took 12627 ms
else:
player2.append(two_card)
player2.append(one_card)
return False
def play_game(player1, player2, game_num):
round_num = 0
game_hands = []
while len(player1) > 0 and len(player2) > 0:
round_num += 1
if (player1, player2) in game_hands:
return 1
game_hands.append((player1.copy(), player2.copy()))
play_round(player1, player2, game_num)
return 1 if len(player1) > 0 else 2
def part_two():
player1, player2 = get_decks()
winner = play_game(player1, player2, 1)
winning_hand = player1 if winner == 1 else player2
return sum(i * winning_hand[-i] for i in range(1, len(winning_hand) + 1))
if __name__ == '__main__':
run_with_timer(part_one) # 33434 -- took 0 ms
run_with_timer(part_two) # 31657 -- took 24304 ms
for tile in black_tiles:
tile_neighbors = get_neighbors(tile)
adjacent_black_tiles = tile_neighbors.intersection(black_tiles)
if len(adjacent_black_tiles) == 0 or len(adjacent_black_tiles) > 2:
flip_to_white.add(tile)
adjacent_white_tiles = tile_neighbors.difference(black_tiles)
for wt in adjacent_white_tiles:
if wt not in visited_white_tiles:
visited_white_tiles.add(wt)
wt_neighbors = get_neighbors(wt)
wt_adjacent_black = wt_neighbors.intersection(black_tiles)
if len(wt_adjacent_black) == 2:
flip_to_black.add(wt)
return black_tiles.union(flip_to_black).difference(flip_to_white)
def part_one():
return len(get_black_tiles())
def part_two():
black_tiles = get_black_tiles()
for i in range(100):
black_tiles = perform_flip(black_tiles)
return len(black_tiles)
if __name__ == '__main__':
run_with_timer(part_one) # 512 -- took 9 ms
run_with_timer(part_two) # 4120 -- took 1800 ms
from aoc_utils import run_with_timer
data = [x.strip() for x in open('input.txt').readlines()]
def part_one():
return sum(
y.count('\\"') + y.count('\\\\') +
((y.count('\\x') - y.count('\\\\x') + y.count('\\\\\\x')) * 3) + 2
for y in (x[1:-1] for x in data))
def part_two():
return sum(x.count('"') + x.count('\\') + 2 for x in data)
if __name__ == '__main__':
run_with_timer(part_one) # 1350 -- took 0 ms
run_with_timer(part_two) # 2085 -- took 0 ms
if is4d:
board[initial_point[0] + x][initial_point[1] +
y][depth][depth] = data[x][y]
else:
board[initial_point[0] + x][initial_point[1] +
y][depth] = data[x][y]
return board
def part_one():
steps = 6
board = initialize_board(steps, False)
for i in range(steps):
board = run_cycle(board, False)
return count_active(board, False)
def part_two():
steps = 6
board = initialize_board(steps, True)
for i in range(steps):
board = run_cycle(board, True)
return count_active(board, True)
if __name__ == '__main__':
run_with_timer(part_one) # 384 -- took 744 ms
run_with_timer(part_two) # 2012 -- took 45906 ms
picked_cards = [curr["next"], curr["next"]["next"], curr["next"]["next"]["next"]] # Effectively REMOVE those three elements by updating points to skip over them. curr["next"] = curr["next"]["next"]["next"]["next"] curr["next"]["previous"] = curr # Get the destination cup picked_vals = [x["val"] for x in picked_cards] dest_val = (curr["val"] - 1) % num_cups if dest_val == 0: dest_val = num_cups while dest_val in picked_vals: dest_val = (dest_val - 1) % num_cups if dest_val == 0: dest_val = num_cups dest_cup = cups[dest_val] # Alright, now just adjust pointers to re-insert the picked values. picked_cards[2]["next"] = dest_cup["next"] picked_cards[2]["next"]["previous"] = picked_cards[2] dest_cup["next"] = picked_cards[0] picked_cards[0]["previous"] = dest_cup # NEXT! curr = curr["next"] return cups[1]["next"]["val"] * cups[1]["next"]["next"]["val"] if __name__ == '__main__': run_with_timer(part_one) # 82934675 -- took 0 ms run_with_timer(part_two) # 474600314018 -- took 22712 ms
match_found = None
for j in range(len(prior_set) - 1):
for k in range(j, len(prior_set)):
if prior_set[j] + prior_set[k] == data[i]:
match_found = (j, k)
if not match_found:
return data[i]
def part_one():
return find_invalid_number(25)
def part_two():
invalid_num = find_invalid_number(25)
for i in range(data.index(invalid_num)):
curr_sum = data[i]
next_idx = i + 1
while curr_sum < invalid_num:
curr_sum += data[next_idx]
next_idx += 1
if curr_sum == invalid_num:
return min(data[i:next_idx]) + max(data[i:next_idx])
if __name__ == '__main__':
run_with_timer(part_one) # 1038347917 -- took 35 ms
run_with_timer(part_two) # 137394018 -- took 47 ms
new_data.append(new_row)
new_rows = [[y + x if y + x <= 9 else y + x - 9 for y in row]
for x in range(1, 5) for row in new_data]
for row in new_rows:
new_data.append(row)
return new_data
def part_one():
m = Grid(values=data)
m.set_neighbors_for_all(False)
return a_star(m.get_point(0, 0),
m.get_point(m.get_height() - 1,
m.get_width() - 1))
# return dijkstra(m, m.get_point(0, 0), m.get_point(m.get_height()-1, m.get_width()-1))
def part_two():
m = Grid(values=get_extended_data())
m.set_neighbors_for_all(False)
return a_star(m.get_point(0, 0),
m.get_point(m.get_height() - 1,
m.get_width() - 1))
# return dijkstra(m, m.get_point(0, 0), m.get_point(m.get_height()-1, m.get_width()-1))
if __name__ == '__main__':
run_with_timer(part_one) # 745 -- took 2978 ms
run_with_timer(part_two) # 3002 -- took 385831 ms
from aoc_utils import run_with_timer
data = [x.strip().split() for x in open("input.txt").readlines()]
def part_one():
dist = sum(int(d[1]) for d in data if d[0] == 'forward')
depth = sum(int(d[1]) for d in data if d[0] == 'down') - sum(int(d[1]) for d in data if d[0] == 'up')
return dist * depth
def part_two():
curr_depth = 0
curr_dist = 0
curr_aim = 0
for d in data:
match d[0]:
case 'forward':
curr_dist += int(d[1])
curr_depth += curr_aim * int(d[1])
case 'down':
curr_aim += int(d[1])
case 'up':
curr_aim -= int(d[1])
return curr_depth * curr_dist
if __name__ == '__main__':
run_with_timer(part_one) # 1660158 -- took 0 ms
run_with_timer(part_two) # 1604592846 -- took 0 ms
from aoc_utils import run_with_timer
data = [int(x.strip()) for x in open("input.txt").readlines()]
def part_one():
return next(first * second for i, first in enumerate(data)
for second in data[i + 1:] if first + second == 2020)
def part_two():
return next(first * second * third for i, first in enumerate(data)
for j, second in enumerate(data[i + 1:])
for third in data[j + 1:] if first + second + third == 2020)
if __name__ == '__main__':
run_with_timer(part_one) # 197451 -- took 0 ms
run_with_timer(part_two) # 138233720 -- took 94 ms
from aoc_utils import run_with_timer
data = [x.strip() for x in open("input.txt").readlines()]
def calc_seat_id(t):
return (int(t[:7].replace('F', '0').replace('B', '1'), 2)) * 8 + int(
t[-3:].replace('L', '0').replace('R', '1'), 2)
def part_one():
return max(calc_seat_id(x) for x in data)
def part_two():
seat_ids = [-1] * (128 * 8)
for x in data:
seat_ids[calc_seat_id(x)] = 1
for i in range(1, len(seat_ids) - 1):
if seat_ids[i] == -1 and seat_ids[i - 1] == 1 and seat_ids[i + 1] == 1:
return i
return None
if __name__ == '__main__':
run_with_timer(part_one) # 911 -- took 1 ms
run_with_timer(part_two) # 629 -- took 1 ms
from aoc_utils import run_with_timer
data = open('input.txt').readline().strip().split(" ")
def get_fill_order(row, col):
tmp = row + col - 2
return (tmp * (tmp+1) // 2) + col
def part_one():
fill_order = get_fill_order(int(data[16][:-1]), int(data[18][:-1]))
val = 20151125
for i in range(2, fill_order+1):
val = (val * 252533) % 33554393
return val
def part_two():
return
if __name__ == '__main__':
run_with_timer(part_one) #
run_with_timer(part_two) #
from aoc_utils import run_with_timer
data = [int(x) for x in open("input.txt").readline().strip().split(",")]
def calculate_total_fish(days):
fish = [data.count(x) for x in range(9)]
for x in range(days):
next_day_fish = [0] * 9
for i, e in enumerate(fish):
if i > 0:
next_day_fish[i - 1] += e
else:
next_day_fish[6] += e
next_day_fish[8] += e
fish = next_day_fish
return sum(x for x in fish)
def part_one():
return calculate_total_fish(80)
def part_two():
return calculate_total_fish(256)
if __name__ == '__main__':
run_with_timer(part_one) # 386536 -- took 0 ms
run_with_timer(part_two) # 1732821262171 -- took 0 ms
