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From: =?UTF-8?Q?Bj=c3=b6rn_Lundin?= <b.f.lundin@gmail.com>
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Subject: Re: Advent of Code day 5
Date: Sun, 6 Dec 2020 15:09:51 +0100
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Den 2020-12-06 kl. 10:14, skrev Jeffrey R. Carter:
> On 12/5/20 3:54 PM, Stephen Leake wrote:
>> that was trivial
> 
> I'm curious: Did everyone do this by treating the input as a coded 
> 10-digit binary number, or did some take another approach?
> 


I uses it as binary 7 +3, but I did the calculaions through the shell 
text utilities


First I decoded and printed all rows, seats and ids like

loop file and decode
   ...
   Text_Io.Put_Line (Row'Img & Seat'Img & Id'Img);
end loop


and ran it through cut/sort/uniq

day_05 | cut  -d' ' -f2 | sort -n | uniq -c

which gave a list on the terminal like


...
    8  61
    8  62
    8  63
    8  64
    8  65
    8  66
    8  67
    8  68
    8  69
    7  70
    8  71
    8  72
    8  73
    8  74

...

and that found my row

then I ran it with grep "^ 70" and got
day_05 | grep "^ 70"
  70 3 563
  70 6 566
  70 5 565
  70 0 560
  70 1 561
  70 4 564
  70 7 567

and saw what seat is free

in the end I saved and printed the max seatid as well



but yes , the encoding was with parsing as binary




-- 
Björn