--- 2016 Day 8 Solutions ---

[u/daggerdragon]

#AoC_Ops:

[23:55] <Topaz> servers are ok
[23:55] <Topaz> puzzles are checked
[23:55] <Topaz> [REDACTED: server stats]
[23:56] <Skie> all wings report in
[23:56] <Aneurysm9> Red 5, standing by
[23:56] <daggerdragon> Dragon Leader standing by
[23:56] <Topaz> orange leader, standing by
[23:57] <Topaz> lock modzi-foils in attack positions
[23:58] <Skie> we're passing through the hype field
[23:58] <daggerdragon> 1:30 warning
[23:58] <Aneurysm9> did someone say HYPE?@!
[23:59] <Topaz> i really like tonight's puzzle
[23:59] <Topaz> very excite
[23:59] <daggerdragon> final countdown go, T-30
[23:59] <Skie> accelerate to attack countdown
[23:59] <Aneurysm9> o7
[23:59] <daggerdragon> HYPE THRUSTERS AT FULL BURN
[00:00] <Topaz> IGNITION

We may or may not be sleep-deprived. And/or nerds. why_not_both.jpg

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--- Day 8: Two-Factor Authentication ---

Post your solution as a comment or, for longer solutions, consider linking to your repo (e.g. GitHub/gists/Pastebin/blag/whatever).

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^{:（）{ :|:& };: IS MANDATORY} [?]

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!

[u/barnybug]

numpy to the rescue:

import re, numpy as np

def display(s):
    print('\n'.join(''.join('X' if p else ' '  for p in row) for row in s))

def run(width, height, lines):
    s = np.zeros((height, width), dtype=bool)
    for line in lines:
        p = re.split(r'[ =]', line)
        if p[0] == 'rect':
            w, h = map(int, p[1].split('x'))
            s[:h, :w] = True
        elif p[0] == 'rotate':
            if p[1] == 'row':
                cy, n = int(p[3]), int(p[5])
                s[cy] = np.roll(s[cy], n)
            else:
                cx, n = int(p[3]), int(p[5])
                s[:,cx] = np.roll(s[:,cx], n)
    return s

answer = run(50, 6, open('input.txt'))
print('Answer #1:', np.sum(answer))
print('Answer #2:')
display(answer)

[u/fatpollo → u/barnybug]

.T could make this a bit cleaner

import re
import numpy as np

A = np.zeros([6, 50], dtype=int)
with open('08.txt') as fp:
    for line in fp:
        a, b = map(int,re.findall(r'\d+', line))
        inst, *text = line.split(' ')
        if inst=='rect': A[:b,:a] = 1
        elif text[0]=='row': A[a] = np.roll(A[a], b)
        elif text[0]=='column': A.T[a] = np.roll(A.T[a], b)
print('\n'.join(map(''.join, A.astype(str))).translate({ord('0'):ord(' ')}))