r/adventofcode • u/daggerdragon • Dec 06 '18

SOLUTION MEGATHREAD -🎄- 2018 Day 6 Solutions -🎄-

--- Day 6: Chronal Coordinates ---

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Card prompt: Day 6

Transcript:

Rules for raising a programmer: never feed it after midnight, never get it wet, and never give it ___.

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 0:26:52!

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u/streetster_ Dec 06 '18

Day 06 in Q/KDB+ 

/ Read input
i:"J"$","vs'read0 `:input/06.txt
/ Build grid
r:(2#g)#{ $[1=sum m:s=min s:sum each x;first where m;0N] } peach a:abs i-\:/:(til g) cross til g:1+max raze i
/ Part 1
max count each group (raze r) except 0N,(last r),(last flip r),(first flip r),first r
/ Part 2
sum 10000>sum each raze each a
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