2024 day 1
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6
2024/01/example.txt
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6
2024/01/example.txt
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3 4
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4 3
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2 5
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1 3
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3 9
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3 3
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59
2024/01/flake.lock
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59
2024/01/flake.lock
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@ -0,0 +1,59 @@
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{
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"nodes": {
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"nixpkgs": {
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"locked": {
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"lastModified": 1732837521,
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"narHash": "sha256-jNRNr49UiuIwaarqijgdTR2qLPifxsVhlJrKzQ8XUIE=",
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"owner": "nixos",
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"repo": "nixpkgs",
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"rev": "970e93b9f82e2a0f3675757eb0bfc73297cc6370",
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"type": "github"
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},
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"original": {
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"owner": "nixos",
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"ref": "nixos-unstable",
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"repo": "nixpkgs",
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"type": "github"
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}
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},
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"nixpkgs_2": {
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"locked": {
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"lastModified": 1703013332,
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"narHash": "sha256-+tFNwMvlXLbJZXiMHqYq77z/RfmpfpiI3yjL6o/Zo9M=",
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"path": "/nix/store/50bgi74d890mpkp90w1jwc5g0dw4dccr-source",
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"rev": "54aac082a4d9bb5bbc5c4e899603abfb76a3f6d6",
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"type": "path"
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},
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"original": {
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"id": "nixpkgs",
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"type": "indirect"
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}
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},
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"root": {
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"inputs": {
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"nixpkgs": "nixpkgs",
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"tix": "tix"
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}
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},
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"tix": {
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"inputs": {
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"nixpkgs": "nixpkgs_2"
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},
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"locked": {
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"lastModified": 1704309534,
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"narHash": "sha256-U9qeMl0WBlpy335gL06WFGvPxLBTd+ToiiCHUHWrgR0=",
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"ref": "refs/heads/master",
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"rev": "5007770e88c4d5f67c3790761a1125904a9ef257",
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"revCount": 20,
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"type": "git",
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"url": "https://git.tristans.cloud/tristan/tix"
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},
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"original": {
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"type": "git",
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"url": "https://git.tristans.cloud/tristan/tix"
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}
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}
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},
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"root": "root",
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"version": 7
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}
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31
2024/01/flake.nix
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31
2024/01/flake.nix
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{
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description = "A very basic flake";
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inputs = {
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nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
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tix.url = "git+https://git.tristans.cloud/tristan/tix";
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};
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outputs = { self, nixpkgs, tix }: let
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pkgs = import nixpkgs {system = "x86_64-linux";};
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solution = import ./solution.nix pkgs;
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in {
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part1example = (solution {file = ./example.txt;}).part1result;
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part1 = (solution {file = ./input.txt;}).part1result;
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part2example = (solution {file = ./example.txt;}).part2result;
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part2 = (solution {file = ./input.txt;}).part2result;
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packages.x86_64-linux.watch = tix.watch {
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cmd = ''
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nix run .\#test --impure --extra-experimental-features pipe-operators
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'';
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};
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packages.x86_64-linux.test = tix.run [
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./solution.test.nix
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];
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};
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}
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1000
2024/01/input.txt
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1000
2024/01/input.txt
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File diff suppressed because it is too large
Load diff
42
2024/01/solution.nix
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42
2024/01/solution.nix
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{lib, ...}: {file}: rec {
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rawContent = builtins.readFile file;
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content = lib.strings.removeSuffix "\n" rawContent;
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lines = lib.strings.splitString "\n" content;
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getLeftAndRight = s: s
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|> lib.strings.splitString " "
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|> map lib.strings.toInt
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;
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splitLists = s: s
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|> map getLeftAndRight
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|> builtins.foldl'
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(prev: next: {
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left = prev.left ++ [(builtins.elemAt next 0)];
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right = prev.right ++ [ ( builtins.elemAt next 1 ) ];})
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{left = []; right = [];}
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;
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sortLists = l: {
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left = lib.lists.sort (a: b: a < b) l.left;
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right = lib.lists.sort (a: b: a < b) l.right;
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};
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distance = l: l
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|> sortLists
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|> ({left, right}: lib.zipListsWith (ln: rn: abs (ln - rn)) left right)
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;
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total = l: builtins.foldl' (x: y: x+y) 0 l;
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abs = n: if n > 0 then n else -n;
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getDiff = s: s
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|> splitLists
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|> distance
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|> total
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;
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similarity = l: l
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|> ({left, right}: map (ln: ln * lib.count (rn: ln == rn) right) left)
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;
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getSimilarity = s: s
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|> splitLists
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|> similarity
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|> total
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;
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part1result = getDiff lines;
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part2result = getSimilarity lines;
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}
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100
2024/01/solution.test.nix
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100
2024/01/solution.test.nix
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{describe, it, ...}:
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let
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pkgs = import <nixpkgs> {};
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solution = import ./solution.nix pkgs;
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example = (solution {file = ./example.txt;});
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in [
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(describe "part1" [
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(it "gets file content" {
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expected = ''
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3 4
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4 3
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2 5
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1 3
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3 9
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3 3'';
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actual = example.content;
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})
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(it "splits lines" {
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expected = [
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"3 4"
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"4 3"
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"2 5"
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"1 3"
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"3 9"
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"3 3"
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];
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actual = example.lines;
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})
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(it "splits left and right" {
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expected = [
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3 4
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];
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actual = example.getLeftAndRight "3 4";
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})
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(it "splits list into left and right" {
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expected = {
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left = [ 3 4 2 1 3 3 ];
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right = [ 4 3 5 3 9 3 ];
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};
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actual = example.splitLists [
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"3 4"
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"4 3"
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"2 5"
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"1 3"
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"3 9"
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"3 3"
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];
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})
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(it "splits list into left and right" {
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expected = {
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left = [ 1 2 3 3 3 4 ];
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right = [ 3 3 3 4 5 9 ];
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};
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actual = example.sortLists {
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left = [ 3 4 2 1 3 3 ];
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right = [ 4 3 5 3 9 3 ];
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};
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})
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(it "calculates the distance between each item" {
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expected = [2 1 0 1 2 5];
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actual = example.distance {
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left = [ 3 4 2 1 3 3 ];
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right = [ 4 3 5 3 9 3 ];
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};
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})
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(it "calculates the total" {
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expected = 11;
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actual = example.total [2 1 0 1 2 5];
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})
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(it "gets diff of list of strings" {
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expected = 11;
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actual = example.getDiff [
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"3 4"
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"4 3"
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"2 5"
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"1 3"
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"3 9"
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"3 3"
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];
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})
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(it "gets similarity" {
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expected = [9 4 0 0 9 9];
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actual = example.similarity {
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left = [ 3 4 2 1 3 3 ];
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right = [ 4 3 5 3 9 3 ];
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};
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})
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(it "gets similarity of list of strings" {
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expected = 31;
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actual = example.getSimilarity [
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"3 4"
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"4 3"
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"2 5"
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"1 3"
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"3 9"
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"3 3"
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];
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})
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])
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]
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10
README.md
10
README.md
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1. [:star: :star:](https://adventofcode.com/2023/day/1 "see puzzle")
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2. [:star: :star:](https://adventofcode.com/2023/day/2 "see puzzle")
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3. [:star: :star:](https://adventofcode.com/2023/day/3 "see puzzle")
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4. [:star: :star:](https://adventofcode.com/2023/day/4 "see puzzle")
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5. [:star: :star:](https://adventofcode.com/2023/day/5 "see puzzle")
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6. [:star: :star:](https://adventofcode.com/2023/day/6 "see puzzle")
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7. [:star: :star:](https://adventofcode.com/2023/day/7 "see puzzle")
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8. [:star: :star:](https://adventofcode.com/2023/day/8 "see puzzle")
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9. [:star: :star:](https://adventofcode.com/2023/day/9 "see puzzle")
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10. [:star: :star:](https://adventofcode.com/2023/day/10 "see puzzle")
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#### [2024](https://adventofcode.com/2024 "2024 puzzle calendar")
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1. [:star: :star:](https://adventofcode.com/2024/day/1 "see puzzle")
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