2023 day2/rust: add solution
This commit is contained in:
parent
02c5511c02
commit
e2433598c3
10
2023/day2/rust/Cargo.toml
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10
2023/day2/rust/Cargo.toml
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@ -0,0 +1,10 @@
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[package]
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name = "rust_2023_02"
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version = "0.1.0"
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edition = "2021"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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aoc = { path = "../../../common/rust" }
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enum-map = "2.7.3"
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115
2023/day2/rust/src/main.rs
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115
2023/day2/rust/src/main.rs
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@ -0,0 +1,115 @@
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#![warn(clippy::pedantic)]
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use std::{cmp::max, io::stdin, str::FromStr};
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use enum_map::{enum_map, Enum, EnumMap};
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Enum)]
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enum Colour {
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Red,
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Green,
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Blue,
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}
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impl FromStr for Colour {
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type Err = ();
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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match s {
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"red" => Ok(Self::Red),
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"green" => Ok(Self::Green),
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"blue" => Ok(Self::Blue),
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_ => Err(()),
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}
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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struct Draw {
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cubes: EnumMap<Colour, usize>,
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}
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impl Draw {
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pub fn is_valid(&self) -> bool {
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let max_values = enum_map! {
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Colour::Red => 12,
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Colour::Green => 13,
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Colour::Blue => 14,
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};
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self.cubes.iter().all(|(c, n)| *n <= max_values[c])
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}
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}
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impl FromStr for Draw {
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type Err = ();
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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let cubes = s
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.split(", ")
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.map(|c| {
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let (n, colour) = c.split_once(' ').unwrap();
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let n = n.parse().unwrap();
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let colour = colour.parse().unwrap();
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(colour, n)
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})
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.collect();
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Ok(Draw { cubes })
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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struct Game {
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draws: Vec<Draw>,
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}
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impl Game {
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pub fn is_valid(&self) -> bool {
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self.draws.iter().all(Draw::is_valid)
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}
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pub fn minimum_cubes_power(&self) -> usize {
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self.draws
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.iter()
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.map(|draw| draw.cubes)
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.fold(EnumMap::default(), |mut acc, cubes| {
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for (c, n) in cubes {
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acc[c] = max(acc[c], n);
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}
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acc
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})
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.values()
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.product()
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}
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}
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impl FromStr for Game {
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type Err = ();
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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let (_, draws) = s.split_once(": ").unwrap();
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let draws = draws
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.split("; ")
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.map(|draw| draw.parse().unwrap())
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.collect();
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Ok(Game { draws })
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}
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}
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fn main() {
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let games: Vec<Game> = stdin()
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.lines()
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.map(|l| l.unwrap().parse().unwrap())
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.collect();
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let valid_game_ids = games
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.iter()
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.enumerate()
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.filter_map(|(i, g)| g.is_valid().then_some(i + 1));
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println!("{}", valid_game_ids.sum::<usize>());
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let powers = games.iter().map(Game::minimum_cubes_power);
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println!("{}", powers.sum::<usize>());
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}
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57
Cargo.lock
generated
57
Cargo.lock
generated
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@ -197,6 +197,26 @@ version = "1.8.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "90e5c1c8368803113bf0c9584fc495a58b86dc8a29edbf8fe877d21d9507e797"
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[[package]]
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name = "enum-map"
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version = "2.7.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "6866f3bfdf8207509a033af1a75a7b08abda06bbaaeae6669323fd5a097df2e9"
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dependencies = [
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"enum-map-derive",
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]
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[[package]]
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name = "enum-map-derive"
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version = "0.17.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "f282cfdfe92516eb26c2af8589c274c7c17681f5ecc03c18255fe741c6aa64eb"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn 2.0.39",
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]
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[[package]]
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name = "fixedbitset"
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version = "0.4.2"
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@ -393,9 +413,9 @@ dependencies = [
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[[package]]
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name = "proc-macro2"
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version = "1.0.47"
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version = "1.0.70"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
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checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
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dependencies = [
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"unicode-ident",
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]
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@ -408,9 +428,9 @@ checksum = "42ecc0faae16de3ca772d9083ce96872ab6758767deb1efb46e954dfc1d98342"
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[[package]]
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name = "quote"
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version = "1.0.21"
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version = "1.0.33"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
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checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
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dependencies = [
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"proc-macro2",
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]
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@ -635,6 +655,14 @@ dependencies = [
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"aoc",
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]
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[[package]]
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name = "rust_2023_02"
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version = "0.1.0"
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dependencies = [
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"aoc",
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"enum-map",
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]
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[[package]]
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name = "rustversion"
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version = "1.0.11"
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@ -686,7 +714,7 @@ checksum = "a55492425aa53521babf6137309e7d34c20bbfbbfcfe2c7f3a047fd1f6b92c0c"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn",
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"syn 1.0.105",
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]
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[[package]]
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@ -719,7 +747,7 @@ dependencies = [
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"proc-macro2",
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"quote",
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"rustversion",
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"syn",
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"syn 1.0.105",
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]
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[[package]]
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@ -733,6 +761,17 @@ dependencies = [
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"unicode-ident",
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]
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[[package]]
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name = "syn"
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version = "2.0.39"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
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dependencies = [
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"proc-macro2",
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"quote",
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"unicode-ident",
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]
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[[package]]
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name = "textwrap"
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version = "0.11.0"
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@ -759,7 +798,7 @@ checksum = "1fb327af4685e4d03fa8cbcf1716380da910eeb2bb8be417e7f9fd3fb164f36f"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn",
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"syn 1.0.105",
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]
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[[package]]
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@ -825,7 +864,7 @@ dependencies = [
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"once_cell",
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"proc-macro2",
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"quote",
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"syn",
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"syn 1.0.105",
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"wasm-bindgen-shared",
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]
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@ -847,7 +886,7 @@ checksum = "07bc0c051dc5f23e307b13285f9d75df86bfdf816c5721e573dec1f9b8aa193c"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn",
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"syn 1.0.105",
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"wasm-bindgen-backend",
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"wasm-bindgen-shared",
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]
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@ -28,4 +28,5 @@ members = [
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"2022/day15/rust",
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"2022/day18/rust",
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"2023/day1/rust",
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"2023/day2/rust",
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]
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