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Setup + Days 1, 2, 3

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Christian
2023-12-03 21:20:45 +01:00
commit 6e60a3f2e6
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/target

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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
[[package]]
name = "aho-corasick"
version = "1.1.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b2969dcb958b36655471fc61f7e416fa76033bdd4bfed0678d8fee1e2d07a1f0"
dependencies = [
"memchr",
]
[[package]]
name = "anyhow"
version = "1.0.75"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a4668cab20f66d8d020e1fbc0ebe47217433c1b6c8f2040faf858554e394ace6"
[[package]]
name = "aoc-2023"
version = "0.1.0"
dependencies = [
"anyhow",
"regex",
]
[[package]]
name = "memchr"
version = "2.6.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
[[package]]
name = "regex"
version = "1.10.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "380b951a9c5e80ddfd6136919eef32310721aa4aacd4889a8d39124b026ab343"
dependencies = [
"aho-corasick",
"memchr",
"regex-automata",
"regex-syntax",
]
[[package]]
name = "regex-automata"
version = "0.4.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5f804c7828047e88b2d32e2d7fe5a105da8ee3264f01902f796c8e067dc2483f"
dependencies = [
"aho-corasick",
"memchr",
"regex-syntax",
]
[[package]]
name = "regex-syntax"
version = "0.8.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"

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Cargo.toml Normal file
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[package]
name = "aoc-2023"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
anyhow = "1.0.75"
regex = "1.10.2"

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Game 1: 1 green, 2 red, 6 blue; 4 red, 1 green, 3 blue; 7 blue, 5 green; 6 blue, 2 red, 1 green
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Game 3: 6 red, 15 blue, 15 green; 1 green, 4 red, 12 blue; 14 blue, 9 red, 1 green; 2 red, 15 blue, 12 green
Game 4: 8 green, 10 blue, 6 red; 20 blue, 4 red; 17 blue, 2 green, 3 red; 4 blue, 2 green, 3 red; 10 red, 3 blue, 3 green; 5 green, 14 blue, 6 red
Game 5: 3 green, 8 blue, 2 red; 11 red, 6 green, 11 blue; 8 red, 5 blue, 2 green
Game 6: 2 blue, 12 red, 2 green; 3 green, 2 red; 3 green, 3 blue, 10 red; 7 red, 2 blue, 4 green; 1 red, 2 blue, 5 green
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Game 11: 14 green; 2 green, 2 red, 11 blue; 9 blue, 3 green
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26
flake.lock generated Normal file
View File

@@ -0,0 +1,26 @@
{
"nodes": {
"nixpkgs": {
"locked": {
"lastModified": 1701068326,
"narHash": "sha256-vmMceA+q6hG1yrjb+MP8T0YFDQIrW3bl45e7z24IEts=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "8cfef6986adfb599ba379ae53c9f5631ecd2fd9c",
"type": "github"
},
"original": {
"id": "nixpkgs",
"ref": "nixos-unstable",
"type": "indirect"
}
},
"root": {
"inputs": {
"nixpkgs": "nixpkgs"
}
}
},
"root": "root",
"version": 7
}

27
flake.nix Normal file
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{
description = "Advent Of Code 2023";
inputs = {
nixpkgs.url = "nixpkgs/nixos-unstable";
};
outputs = { self, nixpkgs }:
let
forAllSystems = function:
nixpkgs.lib.genAttrs [
"x86_64-linux"
"aarch64-darwin"
] (system: function nixpkgs.legacyPackages.${system});
in
{
devShells = forAllSystems (pkgs: with pkgs; {
default = mkShell {
nativeBuildInputs = [ rustc cargo ];
};
});
};
}

60
src/bin/day01.rs Normal file
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use std::env;
use std::fs;
use anyhow::{Context, Result};
fn p1(line: &str) -> Option<u32> {
let digits = line.chars().filter_map(|a| a.to_digit(10));
let first = digits.clone().next()?;
let last = digits.rev().next()?;
Some(first * 10 + last)
}
const DIGIT_NAMES: [&'static str; 9] = [
"one", "two", "three", "four", "five", "six", "seven", "eight", "nine",
];
const REV_DIGIT_NAMES: [&'static str; 9] = [
"eno", "owt", "eerht", "ruof", "evif", "xis", "neves", "thgie", "enin",
];
fn find_first_digit(line: &str, digit_names: &[&'static str; 9]) -> Option<usize> {
let digit_char_position = line.as_bytes().iter().position(u8::is_ascii_digit)?;
let digit_value = usize::from(line.as_bytes()[digit_char_position] - b'0');
(0..digit_char_position)
.find_map(|start| {
let sliced = &line[start..];
digit_names
.into_iter()
.position(|&digit_name| sliced.starts_with(digit_name))
.map(|v| v + 1)
})
.or(Some(digit_value))
}
fn p2(line: &str) -> Option<usize> {
let first = find_first_digit(line, &DIGIT_NAMES)?;
let rev_line = line.chars().rev().collect::<String>();
let last = find_first_digit(rev_line.as_str(), &REV_DIGIT_NAMES)?;
Some(first * 10 + last)
}
fn main() -> Result<()> {
let filename = env::args()
.nth(1)
.context("./day01 <path to puzzle input")?;
let input = fs::read_to_string(filename)?;
let ans1: u32 = input.lines().map(|line| p1(line).unwrap()).sum();
let ans2: usize = input.lines().map(|line| p2(line).unwrap()).sum();
println!("1) {}", ans1);
println!("2) {}", ans2);
Ok(())
}

48
src/bin/day02.rs Normal file
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use std::env;
use std::fs;
use anyhow::{Context, Result};
const MALFORMED: &str = "malformed input.";
fn main() -> Result<()> {
let filename = env::args()
.nth(1)
.context("./day02 <path to puzzle input>")?;
let input = fs::read_to_string(filename)?;
let mut part1 = 0;
let mut part2 = 0;
for line in input.lines() {
let (game_name, game) = line.split_once(": ").context(MALFORMED)?;
let game_id: usize = game_name.split_once(' ').context(MALFORMED)?.1.parse()?;
let mut draw_max = (0u32, 0u32, 0u32);
for draw in game.split("; ") {
for color in draw.split(", ") {
let (count_str, color) = color.split_once(' ').context(MALFORMED)?;
let count: u32 = count_str.parse()?;
match color {
"red" => draw_max.0 = draw_max.0.max(count),
"green" => draw_max.1 = draw_max.1.max(count),
"blue" => draw_max.2 = draw_max.2.max(count),
_ => unreachable!(),
};
}
}
if draw_max.0 <= 12 && draw_max.1 <= 13 && draw_max.2 <= 14 {
part1 += game_id
}
part2 += draw_max.0 * draw_max.1 * draw_max.2;
}
println!("1) {}", part1);
println!("2) {}", part2);
Ok(())
}

62
src/bin/day03.rs Normal file
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use std::collections::HashMap;
use std::env;
use std::fs;
use regex::bytes::Regex;
use anyhow::{Context, Result};
fn main() -> Result<()> {
let filename = env::args()
.nth(1)
.context("./day03 <path to puzzle input>")?;
let input = fs::read_to_string(filename)?;
let lines = input
.lines()
.map(|line| line.as_bytes())
.collect::<Vec<_>>();
let number_re = Regex::new(r"\d+")?;
let h = lines.len();
let w = lines[0].len();
let is_symbol = |c: u8| !c.is_ascii_digit() && c != b'.';
let mut part1: usize = 0;
let mut gears: HashMap<(usize, usize), Vec<_>> = HashMap::new();
for (row, line) in lines.iter().enumerate() {
for number_str in number_re.find_iter(line) {
let value = std::str::from_utf8(number_str.as_bytes())?.parse::<usize>()?;
let mut has_symbol_neighbour = false;
for x in [row.saturating_sub(1), row, row + 1] {
for y in number_str.start().saturating_sub(1)..=number_str.end() {
if x < h && y < w {
has_symbol_neighbour |= is_symbol(lines[x][y]);
if lines[x][y] == b'*' {
gears.entry((x, y)).or_default().push(value);
}
}
}
}
if has_symbol_neighbour {
part1 += value;
}
}
}
let part2: usize = gears
.values()
.filter(|v| v.len() == 2)
.map(|v| v[0] * v[1])
.sum();
println!("1) {}", part1);
println!("2) {}", part2);
Ok(())
}

83
src/main.rs Normal file
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use std::fs;
// fn part2(line: &str) -> (u32, u32) {
// (0, 0)
// }
// fn part1(line: &str) -> (u32, u32) {
// let mut digits = line.chars()
// .filter_map(|a| a.to_digit(10));
// let d1 = digits.next().unwrap();
// (d1, digits.last().unwrap_or(d1))
// }
fn possible(line: &str) -> (bool, u32) {
let a = line.split(':').collect::<Vec<_>>()[1].trim();
let mut power = [0, 0, 0];
let mut possible = true;
for game in a.split(';') {
let game = game.trim();
let parts = game.split(',');
let mut l = [0,0,0];
for part in parts {
let part = part.trim();
let num = part.split(' ').next().unwrap().parse::<u32>().unwrap();
if part.ends_with("red") {
l[0] += num;
power[0] = power[0].max(num);
} else if part.ends_with("green") {
l[1] += num;
power[1] = power[1].max(num);
} else if part.ends_with ("blue") {
l[2] += num;
power[2] = power[2].max(num);
} else {
todo!()
}
}
if l[0] > 12 || l[1] > 13 || l[2] > 14 {
possible = false;
}
}
(true, power[0] * power[1] * power[2])
}
fn main() {
let contents = fs::read_to_string("./data/2.in").expect("");
let ans= contents.lines().enumerate().filter(|(_, line)| possible(line).0).map(|(i, _)| i+1).collect::<Vec<_>>();
let ans2: u32 = contents.lines().map(|line| possible(line).1).sum();
println!("{:?}", ans2);
// let contents = fs::read_to_string("./data/1.in").expect("");
// let data = contents.lines().map(|line| {
// let b = line.to_string()
// .replace("one", "one1one")
// .replace("two", "two2two")
// .replace("three", "three3three")
// .replace("four", "four4four")
// .replace("five", "five5five")
// .replace("six", "six6six")
// .replace("seven", "seven7seven")
// .replace("eight", "eight8eight")
// .replace("nine", "nine9nine");
// let it = b.chars().filter(|a| a.is_digit(10)).collect::<Vec<_>>();
// (it[0], it[it.len() - 1])
// });
// let ans: u32 = data.map(|(c1, c2)| c1.to_digit(10).unwrap() * 10 + c2.to_digit(10).unwrap()).sum();
// println!("{:?}", ans);
}