Timings of my #AdventOfCode 2025 solutions in #python.
I used scipy for day 10 LP and some numpy for day 9. The rest are in plain python 3.13.
The task I enjoyed the most was the graph of day 11 - hard at first and really nice when it clicked. The solution is so pretty =).
![from collections import Counter
from typing import Tuple, List
from functools import cache
day_title = "Plutonian Pebbles"
@cache
def blink(stone: int) -> Tuple[int]:
if stone == 0:
return (1,)
s = str(stone)
if len(s) % 2 == 0:
n = len(s) // 2
return (int(s[:n]), int(s[n:]))
return (stone * 2024,)
def count_stones(stones: List[int], num_blinks: int) -> int:
counts = Counter(stones)
for _ in range(num_blinks):
new_counts = Counter()
for stone, count in counts.items():
for new_stone in blink(stone):
new_counts[new_stone] += count
counts = new_counts
return sum(counts.values())
def part1(text_input: str) -> int:
stones = [int(i) for i in text_input.split()]
res = count_stones(stones, 25)
return res
def part2(text_input: str) -> int:
stones = [int(i) for i in text_input.split()]
res = count_stones(stones, 75)
return res](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:4z2zk3urmhvcntuwvenjsdre/bafkreibbt5wdf3xnijnyh5vo7y7f5mbi62kpet2utyqgrr67az3v6zahta)
