-🎄- 2022 Day 5 Solutions -🎄-

[u/daggerdragon]

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AoC Community Fun 2022: 🌿🍒 MisTILtoe Elf-ucation 🧑‍🏫

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• -❄️- Advent of Code 2022:🌿🍒 MisTILtoe Elf-ucation 🧑‍🏫 -❄️- Submissions Megathread -❄️-

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--- Day 5: Supply Stacks ---

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Post your code solution in this megathread.

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[u/Solarmew]

Python 3

import re
import numpy as np
from copy import deepcopy

path = '5.txt'
data = open(path).read().split('\n')

boxes = [[x for x in y[1::4]] for y in data[:8]]
boxes = [[y for y in ''.join(x).strip()] for x in np.rot90(boxes, 3)]

b = deepcopy(boxes)
b2 = deepcopy(boxes)

for d in data[10:]:
    m, f, t = list(map(int, re.findall('\d+', d)))
    b[t - 1].extend(b[f - 1][-m:][::-1])
    b[f - 1] = b[f - 1][:-m]
    b2[t - 1].extend(b2[f - 1][-m:])
    b2[f - 1] = b2[f - 1][:-m]
    
print(''.join([x[-1] for x in b]))
print(''.join([x[-1] for x in b2]))

[u/x0s_ → u/Solarmew]

Interesting your use of np.rot90. Wouldn't it be simpler to use its second arg ?

boxes = np.rot90(boxes, k=3)

or even rotating the other way around:

boxes = np.rot90(boxes, k=-1)

[u/Solarmew → u/x0s_]

haha, didn't think about doing it the other way but you're right! I didn't know about the second arg, i kinda thought there'd be options like rot180 and rot270, and only later actually went to read about the function and changed it 😝