2024

5 files changed, 1044 insertions, 0 deletions

diff --git a/2024/.gitignore b/2024/.gitignore
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index 0000000..de2cdbd
--- /dev/null
+++ b/2024/.gitignore
@@ -0,0 +1,12 @@
+aoc-cookie.txt
+*.o
+*.hi
+1
+2
+3
+4
+5
+6
+7
+8
+9
diff --git a/2024/1.hs b/2024/1.hs
new file mode 100644
index 0000000..c3871d6
--- /dev/null
+++ b/2024/1.hs
@@ -0,0 +1,13 @@
+{-# OPTIONS_GHC -Wno-incomplete-uni-patterns #-}
+import Data.Bifunctor (bimap)
+import Data.List (sort)
+import qualified Data.Map.Strict as Map
+
+main :: IO ()
+main = do
+  (a, b) <- bimap sort sort . unzip
+          . map (\l -> let [x,y] = words l in (read @Int x, read y))
+          . lines <$> getContents
+  print $ sum (zipWith (\x y -> abs (x - y)) a b)
+  let hist = Map.fromListWith (+) (map (,1 :: Int) b)
+  print $ sum [n * Map.findWithDefault 0 n hist | n <- a]
diff --git a/2024/1.in b/2024/1.in
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index 0000000..0209f1e
--- /dev/null
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+19763   41974
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+35286   97345
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+93438   91603
+60752   53106
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+63280   35027
+43747   71810
+22803   66237
+75256   75256
+70441   72003
+77992   57743
+70884   21412
+91936   77547
+39673   53183
+31518   19763
+23066   48344
+45455   77547
+58606   32254
+33075   21971
+12200   19763
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+45004   94858
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diff --git a/2024/Makefile b/2024/Makefile
new file mode 100644
index 0000000..0d5001f
--- /dev/null
+++ b/2024/Makefile
@@ -0,0 +1,16 @@
+HS_SRC := $(wildcard *.hs)
+HS_EXE := $(HS_SRC:.hs=)
+OBJDIR := .obj
+
+.PHONY: all clean
+
+all: $(HS_EXE)
+
+clean:
+	rm -rf $(HS_EXE) $(OBJDIR)
+
+$(HS_EXE): %: %.hs | $(OBJDIR)
+	ghc -Wall -hidir $(OBJDIR) -odir $(OBJDIR) -o $@ $<
+
+$(OBJDIR):
+	mkdir $(OBJDIR)
diff --git a/2024/get_input.sh b/2024/get_input.sh
new file mode 100755
index 0000000..a94f7ce
--- /dev/null
+++ b/2024/get_input.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+set -eu
+curl -H "Cookie: session=$(cat aoc-cookie.txt)" https://adventofcode.com/2024/day/"$1"/input >"$1".in