1.1 solved

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -23,3 +23,5 @@ cabal.project.local~
 .HTF/
 .ghc.environment.*
 
+.envrc
+.direnv/

CHANGELOG.md

@@ -0,0 +1,5 @@
+# Revision history for aoc
+
+## 0.1.0.0 -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.

aoc.cabal

@@ -0,0 +1,211 @@
+cabal-version:      3.4
+name:               aoc
+version:            0.1.0.0
+-- synopsis:
+-- description:
+license:            AGPL-3.0-or-later
+license-file:       LICENSE
+author:             Nor Führ
+maintainer:         nor@acorneroftheweb.com
+-- copyright:
+build-type:         Simple
+extra-doc-files:    CHANGELOG.md
+-- extra-source-files:
+
+common warnings
+    ghc-options: -Wall
+
+executable 1
+    import:           warnings
+    main-is:          1.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+                    , split
+    hs-source-dirs:   app
+    default-language: GHC2021
+
+executable 2
+    import:           warnings
+    main-is:          2.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 3
+    import:           warnings
+    main-is:          3.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 4
+    import:           warnings
+    main-is:          4.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 5
+    import:           warnings
+    main-is:          5.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 6
+    import:           warnings
+    main-is:          6.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 7
+    import:           warnings
+    main-is:          7.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 8
+    import:           warnings
+    main-is:          8.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 9
+    import:           warnings
+    main-is:          9.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 10
+    import:           warnings
+    main-is:          10.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 11
+    import:           warnings
+    main-is:          11.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 12
+    import:           warnings
+    main-is:          12.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 13
+    import:           warnings
+    main-is:          13.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 14
+    import:           warnings
+    main-is:          14.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 15
+    import:           warnings
+    main-is:          15.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 16
+    import:           warnings
+    main-is:          16.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 17
+    import:           warnings
+    main-is:          17.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 18
+    import:           warnings
+    main-is:          18.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 19
+    import:           warnings
+    main-is:          19.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 20
+    import:           warnings
+    main-is:          20.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 21
+    import:           warnings
+    main-is:          21.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 22
+    import:           warnings
+    main-is:          22.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 23
+    import:           warnings
+    main-is:          23.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021
+executable 24
+    import:           warnings
+    main-is:          24.hs
+    -- other-modules:
+    -- other-extensions:
+    build-depends:    base ^>=4.18.2.1
+    hs-source-dirs:   app
+    default-language: GHC2021

app/1.hs

@@ -0,0 +1,26 @@
+{-# LANGUAGE LambdaCase #-}
+{-# OPTIONS_GHC -Wno-unrecognised-pragmas #-}
+{-# HLINT ignore "Redundant <&>" #-}
+module Main where
+
+import Data.Functor
+import Data.List.Split
+import Data.Char
+import Data.Function
+import Data.List
+
+parse :: String -> ([Int], [Int])
+parse = unzip .
+  ((\case
+      [a,b] -> (read a, read b)
+      e -> error $ "Parsing failed on: " ++ show e
+      ) <$>) .
+  (filter (/= mempty) <$>) .
+  (splitWhen isSpace <$>)  .
+  lines
+
+solve1 :: ([Int], [Int]) -> Int
+solve1 = sum . uncurry (zipWith ((abs .) . (-)) `on` sort)
+
+main :: IO ()
+main = readFile "inputs/1" <&> solve1 . parse >>= print

flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1732837521,
+        "narHash": "sha256-jNRNr49UiuIwaarqijgdTR2qLPifxsVhlJrKzQ8XUIE=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "970e93b9f82e2a0f3675757eb0bfc73297cc6370",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,86 @@
+{
+  description = "aoc goes flakes";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  nixConfig.allow-import-from-derivation = true; # cabal2nix uses IFD
+
+  outputs = { self, nixpkgs, flake-utils }:
+    let
+      ghcVer = "ghc96";
+      makeHaskellOverlay = overlay: final: prev: {
+        haskell = prev.haskell // {
+          packages = prev.haskell.packages // {
+            ${ghcVer} = prev.haskell.packages."${ghcVer}".override (oldArgs: {
+              overrides =
+                prev.lib.composeExtensions (oldArgs.overrides or (_: _: { }))
+                  (overlay prev);
+            });
+          };
+        };
+      };
+
+      out = system:
+        let
+          pkgs = import nixpkgs {
+            inherit system;
+            overlays = [ self.overlays.default ];
+            config.allowBroken = true;
+          };
+
+        in
+        {
+          packages = rec {
+            default = aoc;
+            aoc = pkgs.haskell.packages.${ghcVer}.aoc;
+          };
+
+          checks = {
+            inherit (self.packages.${system}) aoc;
+          };
+
+          # for debugging
+          # inherit pkgs;
+
+          devShells.default =
+            let haskellPackages = pkgs.haskell.packages.${ghcVer};
+            in
+            haskellPackages.shellFor {
+              packages = p: [ self.packages.${system}.aoc ];
+              withHoogle = true;
+              buildInputs =
+                (with pkgs; [
+                  zlib
+                  tailwindcss
+                  just
+                ]) ++
+                (with haskellPackages; [
+                  haskell-language-server
+                  cabal-install
+                ]);
+              # Change the prompt to show that you are in a devShell
+              # shellHook = "export PS1='\\e[1;34mdev > \\e[0m'";
+            };
+        };
+    in
+    flake-utils.lib.eachDefaultSystem out // {
+      # this stuff is *not* per-system
+      overlays = {
+        default = makeHaskellOverlay (prev: hfinal: hprev:
+          let hlib = prev.haskell.lib; in
+          {
+            aoc = hprev.callCabal2nix "aoc" ./. { };
+
+            # here's how to do hacks to the package set
+            # don't run the test suite
+            # fast-tags = hlib.dontCheck hprev.fast-tags;
+            #
+            # don't check version bounds
+            # friendly = hlib.doJailbreak hprev.friendly;
+          });
+      };
+    };
+}