From 66b1e7128b29f2c3d1ae78536630040021d960fe Mon Sep 17 00:00:00 2001
From: Gattix <gattix@cock.li>
Date: Sat, 3 Dec 2022 16:51:46 +0100
Subject: [PATCH] day3

---
 2022/day03/day03.hs  |  17 +++
 2022/day03/input     | 300 +++++++++++++++++++++++++++++++++++++++++++
 2022/day03/testinput |   6 +
 3 files changed, 323 insertions(+)
 create mode 100644 2022/day03/day03.hs
 create mode 100644 2022/day03/input
 create mode 100644 2022/day03/testinput

diff --git a/2022/day03/day03.hs b/2022/day03/day03.hs
new file mode 100644
index 0000000..ba56320
--- /dev/null
+++ b/2022/day03/day03.hs
@@ -0,0 +1,17 @@
+import Data.List
+import Data.List.Split
+import Control.Arrow
+
+main :: IO ()
+main = do
+  input <- lines <$> readFile "input"
+  print $ (day3a &&& day3b >>> sum *** sum) input
+
+day3a :: [String] -> [Int]
+day3a = map $ convert . uncurry intersect . (nub *** nub) . (flip splitAt <*> flip div 2 . length)
+
+day3b :: [String] -> [Int]
+day3b = map (convert . foldl1 intersect) . chunksOf 3
+
+convert :: String -> Int
+convert = (\x->if x>90 then x - 96 else x - 38) . fromEnum . head
diff --git a/2022/day03/input b/2022/day03/input
new file mode 100644
index 0000000..9b16a3c
--- /dev/null
+++ b/2022/day03/input
@@ -0,0 +1,300 @@
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diff --git a/2022/day03/testinput b/2022/day03/testinput
new file mode 100644
index 0000000..f17e726
--- /dev/null
+++ b/2022/day03/testinput
@@ -0,0 +1,6 @@
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