2024-01 in haskell
This commit is contained in:
parent
72a9d740bf
commit
e51c318b87
4 changed files with 1099 additions and 0 deletions
6
2024/01-Historian_Hysteria/example
Normal file
6
2024/01-Historian_Hysteria/example
Normal file
|
@ -0,0 +1,6 @@
|
||||||
|
3 4
|
||||||
|
4 3
|
||||||
|
2 5
|
||||||
|
1 3
|
||||||
|
3 9
|
||||||
|
3 3
|
46
2024/01-Historian_Hysteria/first.hs
Normal file
46
2024/01-Historian_Hysteria/first.hs
Normal file
|
@ -0,0 +1,46 @@
|
||||||
|
-- requires cabal install --lib megaparsec parser-combinators heap vector
|
||||||
|
module Main (main) where
|
||||||
|
|
||||||
|
import Control.Monad (void, when)
|
||||||
|
import qualified Data.List as L
|
||||||
|
import Data.Void (Void)
|
||||||
|
import Text.Megaparsec
|
||||||
|
import Text.Megaparsec.Char
|
||||||
|
|
||||||
|
exampleExpectedOutput = 11
|
||||||
|
|
||||||
|
type Pair = (Int, Int)
|
||||||
|
type Input = [Pair]
|
||||||
|
|
||||||
|
type Parser = Parsec Void String
|
||||||
|
|
||||||
|
parseNumber :: Parser Int
|
||||||
|
parseNumber = read <$> some digitChar <* optional hspace
|
||||||
|
|
||||||
|
parsePair :: Parser Pair
|
||||||
|
parsePair = (,) <$> parseNumber
|
||||||
|
<*> parseNumber
|
||||||
|
|
||||||
|
parseInput' :: Parser Input
|
||||||
|
parseInput' = some (parsePair <* eol) <* eof
|
||||||
|
|
||||||
|
parseInput :: String -> IO Input
|
||||||
|
parseInput filename = do
|
||||||
|
input <- readFile filename
|
||||||
|
case runParser parseInput' filename input of
|
||||||
|
Left bundle -> error $ errorBundlePretty bundle
|
||||||
|
Right input' -> return input'
|
||||||
|
|
||||||
|
compute :: Input -> Int
|
||||||
|
compute input = sum compute'
|
||||||
|
where
|
||||||
|
(l, r) = unzip input
|
||||||
|
compute' = fmap abs $ zipWith (-) (L.sort l) (L.sort r)
|
||||||
|
|
||||||
|
main :: IO ()
|
||||||
|
main = do
|
||||||
|
example <- parseInput "example"
|
||||||
|
let exampleOutput = compute example
|
||||||
|
when (exampleOutput /= exampleExpectedOutput) (error $ "example failed: got " ++ show exampleOutput ++ " instead of " ++ show exampleExpectedOutput)
|
||||||
|
input <- parseInput "input"
|
||||||
|
print $ compute input
|
1000
2024/01-Historian_Hysteria/input
Normal file
1000
2024/01-Historian_Hysteria/input
Normal file
File diff suppressed because it is too large
Load diff
47
2024/01-Historian_Hysteria/second.hs
Normal file
47
2024/01-Historian_Hysteria/second.hs
Normal file
|
@ -0,0 +1,47 @@
|
||||||
|
-- requires cabal install --lib megaparsec parser-combinators heap vector
|
||||||
|
module Main (main) where
|
||||||
|
|
||||||
|
import Control.Monad (void, when)
|
||||||
|
import qualified Data.List as L
|
||||||
|
import Data.Void (Void)
|
||||||
|
import Text.Megaparsec
|
||||||
|
import Text.Megaparsec.Char
|
||||||
|
|
||||||
|
exampleExpectedOutput = 31
|
||||||
|
|
||||||
|
type Pair = (Int, Int)
|
||||||
|
type Input = [Pair]
|
||||||
|
|
||||||
|
type Parser = Parsec Void String
|
||||||
|
|
||||||
|
parseNumber :: Parser Int
|
||||||
|
parseNumber = read <$> some digitChar <* optional hspace
|
||||||
|
|
||||||
|
parsePair :: Parser Pair
|
||||||
|
parsePair = (,) <$> parseNumber
|
||||||
|
<*> parseNumber
|
||||||
|
|
||||||
|
parseInput' :: Parser Input
|
||||||
|
parseInput' = some (parsePair <* eol) <* eof
|
||||||
|
|
||||||
|
parseInput :: String -> IO Input
|
||||||
|
parseInput filename = do
|
||||||
|
input <- readFile filename
|
||||||
|
case runParser parseInput' filename input of
|
||||||
|
Left bundle -> error $ errorBundlePretty bundle
|
||||||
|
Right input' -> return input'
|
||||||
|
|
||||||
|
compute :: Input -> Int
|
||||||
|
compute input = L.foldl' similarity 0 l
|
||||||
|
where
|
||||||
|
(l, r) = unzip input
|
||||||
|
similarity :: Int -> Int -> Int
|
||||||
|
similarity acc i = acc + i * (length $ L.elemIndices i r)
|
||||||
|
|
||||||
|
main :: IO ()
|
||||||
|
main = do
|
||||||
|
example <- parseInput "example"
|
||||||
|
let exampleOutput = compute example
|
||||||
|
when (exampleOutput /= exampleExpectedOutput) (error $ "example failed: got " ++ show exampleOutput ++ " instead of " ++ show exampleExpectedOutput)
|
||||||
|
input <- parseInput "input"
|
||||||
|
print $ compute input
|
Loading…
Add table
Reference in a new issue