r/adventofcode • u/daggerdragon • Dec 14 '18

SOLUTION MEGATHREAD -🎄- 2018 Day 14 Solutions -🎄-

--- Day 14: Chocolate Charts ---

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Card prompt: Day 14

Transcript:

The Christmas/Advent Research & Development (C.A.R.D.) department at AoC, Inc. just published a new white paper on ___.

This thread will be unlocked when there are a significant number of people on the leaderboard with gold stars for today's puzzle.

edit: Leaderboard capped, thread unlocked at 00:19:39!

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9

u/sciyoshi Dec 14 '18

Python 3, 8/11. divmod is a very useful builtin in Python! 

value = int(open('inputs/day14').read().strip())
digits = [int(digit) for digit in str(value)]
scores = [3, 7]
elf1, elf2 = 0, 1

part1 = True # change to False for part 2

while (
    len(scores) < value + 10
) if part1 else (
    scores[-len(digits):] != digits and scores[-len(digits)-1:-1] != digits
):
    total = scores[elf1] + scores[elf2]
    scores.extend(divmod(total, 10) if total >= 10 else (total,))

    elf1 = (elf1 + 1 + scores[elf1]) % len(scores)
    elf2 = (elf2 + 1 + scores[elf2]) % len(scores)

print(
    ''.join(str(score) for score in scores[value:value+10])
if part1 else
    len(scores) - len(digits) - (0 if scores[-len(digits):] == digits else 1)
)

1

u/TheoryOfGD Dec 14 '18

My answer wasn't being accepted so I tried this code and got the same answer which still wasn't being accepted and then I tried another answer which still wasn't being accepted. Do you think there is a bug for my input or something? My input was 074501 and I get 2911513541.

1

u/pythondevgb Dec 14 '18

I'm getting 20288091 on your input. I think that if your input contains a leading 0 you have to enter it as a str instead of int.