advent-of-code/2021/d06/ex1/ex1.py
Bruno BELANYI acfc841539 treewide: fix 'ruff check' errors
This is mostly about unused imports.

A couple errors remain, but are fine in my book (using `l` as a variable
name, assigning a lambda to a variable).
2024-12-03 10:28:53 +00:00

45 lines
972 B
Python
Executable file

#!/usr/bin/env python
import itertools
import sys
from collections import Counter
from typing import Iterator, List, TypeVar
T = TypeVar("T")
def nth(iterable: Iterator[T], n: int) -> T:
return next(itertools.islice(iterable, n, None))
def solve(input: List[str]) -> int:
fish = [0] * 9
for n, count in Counter(map(int, input[0].split(","))).items():
fish[n] = count
def step(fish: List[int]) -> List[int]:
# Count how many clones happen
new_fish = fish[0]
# Do the next cycle
fish[0:-1] = fish[1:]
fish[6] += new_fish
fish[8] = new_fish # Override number of new fish
return fish
def iter(fish: List[int]) -> Iterator[List[int]]:
while True:
yield (fish := step(fish))
return sum(nth(iter(fish), 80 - 1))
def main() -> None:
input = [line.strip() for line in sys.stdin.readlines()]
print(solve(input))
if __name__ == "__main__":
main()