From: Neil Smith Date: Mon, 7 Dec 2020 12:13:46 +0000 (+0000) Subject: Done day 25 X-Git-Url: https://git.njae.me.uk/?a=commitdiff_plain;h=3678ceddbeee0dd08141a177709579ee494bc8da;p=advent-of-code-19.git Done day 25 --- diff --git a/advent25/package.yaml b/advent25/package.yaml new file mode 100644 index 0000000..2df1822 --- /dev/null +++ b/advent25/package.yaml @@ -0,0 +1,60 @@ +# This YAML file describes your package. Stack will automatically generate a +# Cabal file when you run `stack build`. See the hpack website for help with +# this file: . + +name: advent25 +synopsis: Advent of Code +version: '0.0.1' + +default-extensions: +- AllowAmbiguousTypes +- ApplicativeDo +- BangPatterns +- BlockArguments +- DataKinds +- DeriveFoldable +- DeriveFunctor +- DeriveGeneric +- DeriveTraversable +- EmptyCase +- FlexibleContexts +- FlexibleInstances +- FunctionalDependencies +- GADTs +- GeneralizedNewtypeDeriving +- ImplicitParams +- KindSignatures +- LambdaCase +- MonadComprehensions +- MonoLocalBinds +- MultiParamTypeClasses +- MultiWayIf +- NegativeLiterals +- NumDecimals +- OverloadedLists +- OverloadedStrings +- PartialTypeSignatures +- PatternGuards +- PatternSynonyms +- PolyKinds +- RankNTypes +- RecordWildCards +- ScopedTypeVariables +- TemplateHaskell +- TransformListComp +- TupleSections +- TypeApplications +- TypeInType +- TypeOperators +- ViewPatterns + + +executables: + advent25: + main: advent25.hs + source-dirs: src + dependencies: + - base >= 2 && < 6 + - text + - containers + - intcode diff --git a/advent25/src/advent25.hs b/advent25/src/advent25.hs new file mode 100644 index 0000000..c3c0c1f --- /dev/null +++ b/advent25/src/advent25.hs @@ -0,0 +1,84 @@ +-- import Debug.Trace + +import Intcode + +import qualified Data.Text.IO as TIO +import qualified Data.Text as T +import Data.Char +import Data.List + +main :: IO () +main = do + text <- TIO.readFile "data/advent25.txt" + let mem = parseMachineMemory text + print $ length mem + (machine, instructions, items) <- runPreamble mem + -- runGameM machine instructions + putStrLn $ passSecurity machine instructions items + +runPreamble :: [Integer] -> IO (Machine, [String], [String]) +runPreamble mem = + do + instr <- TIO.readFile "data/advent25-instructions.txt" + let instructions = lines $ T.unpack instr + -- runGame mem $ lines $ T.unpack instructions + let (machine, _output) = runCommand mem instructions + let (_s, _machine1, output1) = runMachine (encodeCommands (instructions ++ ["inv"])) machine + putStrLn $ decodeOutput output1 + let items = extractItems $ decodeOutput output1 + -- print items + return (machine, instructions, items) + + +encodeCommands :: [String] -> [Integer] +encodeCommands cmds = map (fromIntegral . ord) $ concat $ map (++ "\n") cmds + +decodeOutput :: [Integer] -> String +decodeOutput = map (chr . fromIntegral) + +extractItems :: String -> [String] +extractItems text = items + where candidates = lines text + items = map (drop 2) $ filter (isPrefixOf "- ") candidates + + +powerList :: [a] -> [[a]] +powerList [] = [[]] +powerList (x:xs) = powerList xs ++ map (x:) (powerList xs) + + +passSecurity :: Machine -> [String] -> [String] -> String +passSecurity machine instructions items = + "You keep: " ++ (intercalate ", " keeps) ++ "\n\n" ++ (attemptSecurity machine instructions validDropset) + where + dropsets = powerList items + validDropset = head $ filter (passesSecurity machine instructions) dropsets + keeps = items \\ validDropset + +passesSecurity :: Machine -> [String] -> [String] -> Bool +passesSecurity machine instructions drops = not ("Alert" `isInfixOf` output) + where output = attemptSecurity machine instructions drops + +attemptSecurity :: Machine -> [String] -> [String] -> String +attemptSecurity machine instructions drops = decodeOutput output + where dropCommands = map ("drop " ++ ) drops + (_, _, output) = runMachine (encodeCommands (instructions ++ dropCommands ++ ["north"])) machine + +runCommand :: [Integer] -> [String] -> (Machine, String) +runCommand mem inputs = ( machine, decodeOutput output ) + where (_state, machine, output) = runProgram inputCodes mem + inputCodes = encodeCommands inputs + +runGame :: [Integer] -> [String] -> IO () +runGame mem inputs = + do let (_, outputs) = runCommand mem inputs + putStrLn outputs + nextIn <- getLine + runGame mem (inputs ++ [nextIn]) + +runGameM :: Machine -> [String] -> IO () +runGameM machine inputs = + do nextIn <- getLine + let (_s, machine1, output1) = runMachine (encodeCommands (inputs ++ [nextIn])) machine + putStrLn $ decodeOutput output1 + runGameM machine1 (inputs ++ [nextIn]) diff --git a/data/advent25-instructions.txt b/data/advent25-instructions.txt new file mode 100644 index 0000000..dcb2407 --- /dev/null +++ b/data/advent25-instructions.txt @@ -0,0 +1,32 @@ +south +take boulder +west +take asterisk +east +east +take food ration +west +north +east +take candy cane +north +north +take mutex +north +take prime number +south +south +east +north +take mug +south +west +south +east +north +take loom +south +east +south +east +east diff --git a/data/advent25.txt b/data/advent25.txt new file mode 100644 index 0000000..1de6cdf --- /dev/null +++ b/data/advent25.txt @@ -0,0 +1 @@ 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diff --git a/problems/day25.html b/problems/day25.html new file mode 100644 index 0000000..307a686 --- /dev/null +++ b/problems/day25.html @@ -0,0 +1,142 @@ + + + + +Day 25 - Advent of Code 2019 + + + + + + + +

Advent of Code

Neil Smith (AoC++) 50*

        //2019

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--- Day 25: Cryostasis ---

As you approach Santa's ship, your sensors report two important details:

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First, that you might be too late: the internal temperature is -40 degrees.

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Second, that one faint life signature is somewhere on the ship.

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The airlock door is locked with a code; your best option is to send in a small droid to investigate the situation. You attach your ship to Santa's, break a small hole in the hull, and let the droid run in before you seal it up again. Before your ship starts freezing, you detach your ship and set it to automatically stay within range of Santa's ship.

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This droid can follow basic instructions and report on its surroundings; you can communicate with it through an Intcode program (your puzzle input) running on an ASCII-capable computer.

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As the droid moves through its environment, it will describe what it encounters. When it says Command?, you can give it a single instruction terminated with a newline (ASCII code 10). Possible instructions are:

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  • Movement via north, south, east, or west.
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  • To take an item the droid sees in the environment, use the command take <name of item>. For example, if the droid reports seeing a red ball, you can pick it up with take red ball.
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  • To drop an item the droid is carrying, use the command drop <name of item>. For example, if the droid is carrying a green ball, you can drop it with drop green ball.
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  • To get a list of all of the items the droid is currently carrying, use the command inv (for "inventory").
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Extra spaces or other characters aren't allowed - instructions must be provided precisely.

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Santa's ship is a Reindeer-class starship; these ships use pressure-sensitive floors to determine the identity of droids and crew members. The standard configuration for these starships is for all droids to weigh exactly the same amount to make them easier to detect. If you need to get past such a sensor, you might be able to reach the correct weight by carrying items from the environment.

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Look around the ship and see if you can find the password for the main airlock.

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Your puzzle answer was 269520896.

--- Part Two ---

As you move through the main airlock, the air inside the ship is already heating up to reasonable levels. Santa explains that he didn't notice you coming because he was just taking a quick nap. The ship wasn't frozen; he just had the thermostat set to "North Pole".

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You make your way over to the navigation console. It beeps. "Status: Stranded. Please supply measurements from 49 stars to recalibrate."

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"49 stars? But the Elves told me you needed fifty--"

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Santa just smiles and nods his head toward the window. There, in the distance, you can see the center of the Solar System: the Sun!

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The navigation console beeps again.

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If you like, you can .

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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.

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If you still want to see it, you can get your puzzle input.

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You can also this puzzle.

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+ + + + + + \ No newline at end of file diff --git a/stack.yaml b/stack.yaml index 50f56d8..2a50d8c 100644 --- a/stack.yaml +++ b/stack.yaml @@ -62,6 +62,7 @@ packages: - advent22 - advent23 - advent24 +- advent25 # Dependency packages to be pulled from upstream that are not in the resolver.