57 lines
No EOL
2.9 KiB
Text
57 lines
No EOL
2.9 KiB
Text
\--- Day 16: Aunt Sue ---
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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".
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You have 500 Aunts named "Sue".
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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.
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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:
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* `children`, by human DNA age analysis.
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* `cats`. It doesn't differentiate individual breeds.
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* Several seemingly random breeds of dog: `[samoyeds](https://en.wikipedia.org/wiki/Samoyed_%28dog%29)`, `[pomeranians](https://en.wikipedia.org/wiki/Pomeranian_%28dog%29)`, `[akitas](https://en.wikipedia.org/wiki/Akita_%28dog%29)`, and `[vizslas](https://en.wikipedia.org/wiki/Vizsla)`.
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* `goldfish`. No other kinds of fish.
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* `trees`, all in one group.
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* `cars`, presumably by exhaust or gasoline or something.
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* `perfumes`, which is handy, since many of your Aunts Sue wear a few kinds.
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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](https://en.wikipedia.org/wiki/Ticker_tape):
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```
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children: 3
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cats: 7
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samoyeds: 2
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pomeranians: 3
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akitas: 0
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vizslas: 0
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goldfish: 5
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trees: 3
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cars: 2
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perfumes: 1
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```
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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.
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What is the *number* of the Sue that got you the gift?
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Your puzzle answer was `103`.
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\--- Part Two ---
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----------
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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](https://www.youtube.com/watch?v=RXJKdh1KZ0w), and so the output from the machine isn't exact values - some of them indicate ranges.
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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).
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What is the *number* of the real Aunt Sue?
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Your puzzle answer was `405`.
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Both parts of this puzzle are complete! They provide two gold stars: \*\*
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At this point, all that is left is for you to [admire your Advent calendar](/2015).
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If you still want to see it, you can [get your puzzle input](16/input). |