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feat: day 1

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Lucy 2024-12-02 07:25:29 +01:00
commit 7f5c391656
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1
.envrc Normal file
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use flake

4
.gitignore vendored Normal file
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.cache
target
.direnv
inputs/*/input.txt

7
Cargo.lock generated Normal file
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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 4
[[package]]
name = "aoc2024"
version = "0.1.0"

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Cargo.toml Normal file
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[package]
name = "aoc2024"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]

128
flake.lock Normal file
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{
"nodes": {
"flake-parts": {
"inputs": {
"nixpkgs-lib": "nixpkgs-lib"
},
"locked": {
"lastModified": 1730504689,
"narHash": "sha256-hgmguH29K2fvs9szpq2r3pz2/8cJd2LPS+b4tfNFCwE=",
"owner": "hercules-ci",
"repo": "flake-parts",
"rev": "506278e768c2a08bec68eb62932193e341f55c90",
"type": "github"
},
"original": {
"owner": "hercules-ci",
"repo": "flake-parts",
"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"
}
},
"nixpkgs-lib": {
"locked": {
"lastModified": 1730504152,
"narHash": "sha256-lXvH/vOfb4aGYyvFmZK/HlsNsr/0CVWlwYvo2rxJk3s=",
"type": "tarball",
"url": "https://github.com/NixOS/nixpkgs/archive/cc2f28000298e1269cea6612cd06ec9979dd5d7f.tar.gz"
},
"original": {
"type": "tarball",
"url": "https://github.com/NixOS/nixpkgs/archive/cc2f28000298e1269cea6612cd06ec9979dd5d7f.tar.gz"
}
},
"nixpkgs_2": {
"locked": {
"lastModified": 1728538411,
"narHash": "sha256-f0SBJz1eZ2yOuKUr5CA9BHULGXVSn6miBuUWdTyhUhU=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "b69de56fac8c2b6f8fd27f2eca01dcda8e0a4221",
"type": "github"
},
"original": {
"owner": "NixOS",
"ref": "nixpkgs-unstable",
"repo": "nixpkgs",
"type": "github"
}
},
"nixpkgs_3": {
"locked": {
"lastModified": 1731890469,
"narHash": "sha256-D1FNZ70NmQEwNxpSSdTXCSklBH1z2isPR84J6DQrJGs=",
"owner": "nixos",
"repo": "nixpkgs",
"rev": "5083ec887760adfe12af64830a66807423a859a7",
"type": "github"
},
"original": {
"owner": "nixos",
"ref": "nixpkgs-unstable",
"repo": "nixpkgs",
"type": "github"
}
},
"root": {
"inputs": {
"flake-parts": "flake-parts",
"nixpkgs": "nixpkgs",
"rust-overlay": "rust-overlay",
"treefmt": "treefmt"
}
},
"rust-overlay": {
"inputs": {
"nixpkgs": "nixpkgs_2"
},
"locked": {
"lastModified": 1733020719,
"narHash": "sha256-Chv9+3zrf1DhdB9JyskjoV0vJbCQEgkVqrU3p4RPLv8=",
"owner": "oxalica",
"repo": "rust-overlay",
"rev": "8e18f10703112e6c33e1c0d8b93e8305f6f0a75c",
"type": "github"
},
"original": {
"owner": "oxalica",
"repo": "rust-overlay",
"type": "github"
}
},
"treefmt": {
"inputs": {
"nixpkgs": "nixpkgs_3"
},
"locked": {
"lastModified": 1732894027,
"narHash": "sha256-2qbdorpq0TXHBWbVXaTqKoikN4bqAtAplTwGuII+oAc=",
"owner": "numtide",
"repo": "treefmt-nix",
"rev": "6209c381904cab55796c5d7350e89681d3b2a8ef",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "treefmt-nix",
"type": "github"
}
}
},
"root": "root",
"version": 7
}

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flake.nix Normal file
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{
description = "Description for the project";
inputs = {
flake-parts.url = "github:hercules-ci/flake-parts";
nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
rust-overlay.url = "github:oxalica/rust-overlay";
treefmt.url = "github:numtide/treefmt-nix";
};
outputs =
inputs@{ flake-parts, ... }:
flake-parts.lib.mkFlake { inherit inputs; } {
imports = [ inputs.treefmt.flakeModule ];
systems = [
"x86_64-linux"
"aarch64-linux"
"aarch64-darwin"
"x86_64-darwin"
];
perSystem =
{
config,
self',
inputs',
pkgs,
system,
...
}:
let
runtimeDeps = with pkgs; [
alsa-lib
speechd
];
buildDeps = with pkgs; [
pkg-config
rustPlatform.bindgenHook
];
devDeps = with pkgs; [ gdb ];
cargoToml = builtins.fromTOML (builtins.readFile ./Cargo.toml);
rustPackage =
features:
(pkgs.makeRustPlatform {
cargo = pkgs.rust-bin.stable.latest.minimal;
rustc = pkgs.rust-bin.stable.latest.minimal;
}).buildRustPackage
{
inherit (cargoToml.package) name version;
src = ./.;
cargoLock.lockFile = ./Cargo.lock;
buildFeatures = features;
buildInputs = runtimeDeps;
nativeBuildInputs = buildDeps;
# Uncomment if your cargo tests require networking or otherwise
# don't play nicely with the Nix build sandbox:
# doCheck = false;
};
in
{
_module.args.pkgs = import inputs.nixpkgs {
inherit system;
overlays = [ (import inputs.rust-overlay) ];
};
packages.default = self'.packages.example;
devShells.default = pkgs.mkShell {
shellHook = ''
export RUST_SRC_PATH=${pkgs.rustPlatform.rustLibSrc}
'';
buildInputs = runtimeDeps;
nativeBuildInputs = buildDeps ++ devDeps ++ [ (pkgs.rust-bin.selectLatestNightlyWith (toolchain: toolchain.default)) ];
};
packages.example = (rustPackage "foobar");
packages.example-base = (rustPackage "");
treefmt = {
projectRootFile = "./flake.nix";
programs = {
nixfmt.enable = true;
rustfmt.enable = true;
};
};
};
flake = {
# The usual flake attributes can be defined here, including system-
# agnostic ones like nixosModule and system-enumerating ones, although
# those are more easily expressed in perSystem.
};
};
}

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inputs/day01/example.txt Normal file
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3 4
4 3
2 5
1 3
3 9
3 3

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src/day01.rs Normal file
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pub fn pt1(input: &str) -> i32 {
let elems = input
.lines()
.filter_map(|l| l.split_once(" "))
.map(|(l, r)| (l.parse::<i32>(), r.parse::<i32>()))
.filter(|(l, r)| l.is_ok() && r.is_ok())
.map(|(l, r)| (l.unwrap(), r.unwrap()));
let mut lefts = elems.clone().map(|(l, _)| l).collect::<Vec<_>>();
let mut rights = elems.map(|(_, r)| r).collect::<Vec<_>>();
lefts.sort_unstable();
rights.sort_unstable();
let res: u32 = lefts
.iter()
.zip(rights.iter())
.map(|(l, r)| l.abs_diff(*r))
.sum();
res as i32
}
pub fn pt2(input: &str) -> i32 {
let elems = input
.lines()
.filter_map(|l| l.split_once(" "))
.map(|(l, r)| (l.parse::<i32>(), r.parse::<i32>()))
.filter(|(l, r)| l.is_ok() && r.is_ok())
.map(|(l, r)| (l.unwrap(), r.unwrap()));
let lefts = elems.clone().map(|(l, _)| l);
let rights = elems.map(|(_, r)| r).collect::<Vec<_>>();
lefts
.map(|l| rights.clone().iter().filter(|r| **r == l).count() as i32 * l)
.sum()
}
#[cfg(test)]
mod tests {
use std::fs::read_to_string;
use crate::day01::{pt1, pt2};
#[test]
pub fn test_pt1() {
let input =
read_to_string("./inputs/day01/example.txt").expect("Missing example.txt for day01");
assert_eq!(pt1(&input), 11)
}
#[test]
pub fn test_pt2() {
let input =
read_to_string("./inputs/day01/example.txt").expect("Missing example.txt for day01");
assert_eq!(pt2(&input), 31)
}
}

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src/main.rs Normal file
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use std::fs::read_to_string;
use crate::day01::{pt1, pt2};
mod day01;
fn main() {
println!("day 01!");
let input = read_to_string("./inputs/day01/input.txt").expect("Missing input.txt for day01");
println!("And the result is: {}", pt1(&input));
println!("Part 2: {}", pt2(&input));
}