100 lines
3.3 KiB
Plaintext
100 lines
3.3 KiB
Plaintext
Advent of Code
|
||
|
||
--- Day 16: Aunt Sue ---
|
||
|
||
Your Aunt Sue has given you a wonderful gift, and you'd like to send her a
|
||
thank you card. However, there's a small problem: she signed it "From, Aunt
|
||
Sue".
|
||
|
||
You have 500 Aunts named "Sue".
|
||
|
||
So, to avoid sending the card to the wrong person, you need to figure out
|
||
which Aunt Sue (which you conveniently number 1 to 500, for sanity) gave you
|
||
the gift. You open the present and, as luck would have it, good ol' Aunt Sue
|
||
got you a My First Crime Scene Analysis Machine! Just what you wanted. Or
|
||
needed, as the case may be.
|
||
|
||
The My First Crime Scene Analysis Machine (MFCSAM for short) can detect a
|
||
few specific compounds in a given sample, as well as how many distinct kinds
|
||
of those compounds there are. According to the instructions, these are what
|
||
the MFCSAM can detect:
|
||
|
||
• children, by human DNA age analysis.
|
||
|
||
• cats. It doesn't differentiate individual breeds.
|
||
|
||
• Several seemingly random breeds of dog: samoyeds, pomeranians, akitas,
|
||
and vizslas.
|
||
|
||
• goldfish. No other kinds of fish.
|
||
|
||
• trees, all in one group.
|
||
|
||
• cars, presumably by exhaust or gasoline or something.
|
||
|
||
• perfumes, which is handy, since many of your Aunts Sue wear a few kinds.
|
||
|
||
In fact, many of your Aunts Sue have many of these. You put the wrapping
|
||
from the gift into the MFCSAM. It beeps inquisitively at you a few times and
|
||
then prints out a message on ticker tape:
|
||
|
||
children: 3
|
||
cats: 7
|
||
samoyeds: 2
|
||
pomeranians: 3
|
||
akitas: 0
|
||
vizslas: 0
|
||
goldfish: 5
|
||
trees: 3
|
||
cars: 2
|
||
perfumes: 1
|
||
|
||
You make a list of the things you can remember about each Aunt Sue. Things
|
||
missing from your list aren't zero - you simply don't remember the value.
|
||
|
||
What is the number of the Sue that got you the gift?
|
||
|
||
Your puzzle answer was 373.
|
||
|
||
--- Part Two ---
|
||
|
||
As you're about to send the thank you note, something in the MFCSAM's
|
||
instructions catches your eye. Apparently, it has an outdated
|
||
retroencabulator, and so the output from the machine isn't exact values -
|
||
some of them indicate ranges.
|
||
|
||
In particular, the cats and trees readings indicates that there are greater
|
||
than that many (due to the unpredictable nuclear decay of cat dander and
|
||
tree pollen), while the pomeranians and goldfish readings indicate that
|
||
there are fewer than that many (due to the modial interaction of
|
||
magnetoreluctance).
|
||
|
||
What is the number of the real Aunt Sue?
|
||
|
||
Your puzzle answer was 260.
|
||
|
||
Both parts of this puzzle are complete! They provide two gold stars: **
|
||
|
||
At this point, you should return to your advent calendar and try another
|
||
puzzle.
|
||
|
||
If you still want to see it, you can get your puzzle input.
|
||
|
||
References
|
||
|
||
Visible links
|
||
. http://adventofcode.com/
|
||
. http://adventofcode.com/about
|
||
. http://adventofcode.com/stats
|
||
. http://adventofcode.com/leaderboard
|
||
. http://adventofcode.com/settings
|
||
. http://adventofcode.com/auth/logout
|
||
. https://en.wikipedia.org/wiki/Samoyed_%28dog%29
|
||
. https://en.wikipedia.org/wiki/Pomeranian_%28dog%29
|
||
. https://en.wikipedia.org/wiki/Akita_%28dog%29
|
||
. https://en.wikipedia.org/wiki/Vizsla
|
||
. https://en.wikipedia.org/wiki/Ticker_tape
|
||
. https://www.youtube.com/watch?v=RXJKdh1KZ0w
|
||
. http://adventofcode.com/
|
||
. http://adventofcode.com/day/16/input
|