day11/solution_gpt-4o.py

def transform_stones(stones):
    new_stones = []
    for stone in stones:
        if stone == 0:
            new_stones.append(1)
        elif len(str(stone)) % 2 == 0:
            # Split the stone
            str_stone = str(stone)
            mid = len(str_stone) // 2
            left = int(str_stone[:mid])
            right = int(str_stone[mid:])
            new_stones.extend([left, right])
        else:
            # Multiply by 2024
            new_stones.append(stone * 2024)
    return new_stones

def simulate_blinks(initial_stones, blinks):
    stones = initial_stones
    for _ in range(blinks):
        stones = transform_stones(stones)
    return stones

# Read input from file
file = "input.txt"
with open(file, "r") as f:
    initial_stones = list(map(int, f.read().strip().split()))

# Part 1: After 25 blinks
stones_after_25_blinks = simulate_blinks(initial_stones, 25)
print(len(stones_after_25_blinks))

# Part 2: After 75 blinks
stones_after_75_blinks = simulate_blinks(initial_stones, 75)
print(len(stones_after_75_blinks))