advent-of-code-2k21/day4/day4.py

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2021-12-06 17:28:23 +00:00
from dataclasses import dataclass
from collections import deque
@dataclass
class BingoItem:
value: int
marked: bool = False
def parse_grid(inp):
raw_grid = [inp.popleft() for _ in range(5)]
grid = [[BingoItem(int(y)) for y in x.rstrip().split(" ") if y != ''] for x in raw_grid]
return grid
def parse_grids(inp):
grids = []
while len(inp) >= 5:
grid = parse_grid(inp)
grids.append(grid)
try:
inp.popleft()
except IndexError:
break
return grids
def check_line_win(grid):
for line in grid:
if all(n.marked for n in line):
return True
return False
def check_column_win(grid):
for col_number in range(len(grid[0])):
column = [line[col_number] for line in grid]
if all(x.marked for x in column):
return True
return False
def calculate_score(grid, final_num):
unmarked = sum([sum([n.value for n in line if not n.marked]) for line in grid])
return final_num * unmarked
def print_green(text, end):
print(f"\033[1;32;40m{text}\033[0;37;40m", end=end)
def print_grid(grid):
for line in grid:
for col in line:
if col.marked:
print_green(f"{str(col.value).ljust(2)}", " ")
else:
print(f"{str(col.value).ljust(2)}", end=" ")
print()
print()
def play_bingo(numbers, grids):
winning_grids = []
for number in numbers:
print(number)
for grid in grids:
for line in grid:
for grid_number in line:
if grid_number.value == number:
grid_number.marked = True
for grid in grids:
win = [check_line_win(grid), check_column_win(grid)]
if any(win):
winning_grids.append((grid, number))
# the grid won, remove it from the game
grids.remove(grid)
first_winning_grid, number = winning_grids[0]
first_score = calculate_score(first_winning_grid, number)
print(f"Part 1, score = {first_score}")
last_winning_grid, number = winning_grids[-1]
last_score = calculate_score(last_winning_grid, number)
print(f"Part 2, score {last_score}")
def main(input_file):
with open(input_file) as f:
inp = deque(f.readlines())
numbers = [int(x) for x in inp.popleft().split(",")]
inp.popleft()
grids = parse_grids(inp)
play_bingo(numbers, grids)
if __name__ == "__main__":
main("input.txt")