2022 day2/rust: add solution

This commit is contained in:
Xiretza 2022-12-02 07:36:18 +01:00
parent e904ed4d34
commit 56eb362c3d
4 changed files with 134 additions and 0 deletions

View file

@ -0,0 +1,8 @@
[package]
name = "rust_2022_02"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]

121
2022/day2/rust/src/main.rs Normal file
View file

@ -0,0 +1,121 @@
use std::{
io::{stdin, Read},
str::FromStr,
};
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
enum Rps {
Rock,
Paper,
Scissors,
}
impl Rps {
fn outcome_against(&self, other: Rps) -> Outcome {
match (self, other) {
(Rps::Rock, Rps::Scissors) | (Rps::Paper, Rps::Rock) | (Rps::Scissors, Rps::Paper) => {
Outcome::Win
}
(Rps::Rock, Rps::Rock) | (Rps::Paper, Rps::Paper) | (Rps::Scissors, Rps::Scissors) => {
Outcome::Draw
}
(Rps::Rock, Rps::Paper) | (Rps::Paper, Rps::Scissors) | (Rps::Scissors, Rps::Rock) => {
Outcome::Lose
}
}
}
fn score(&self) -> u64 {
match self {
Rps::Rock => 1,
Rps::Paper => 2,
Rps::Scissors => 3,
}
}
fn with_outcome(&self, outcome: Outcome) -> Rps {
match (self, outcome) {
(r, Outcome::Draw) => *r,
(Rps::Rock, Outcome::Lose) => Rps::Scissors,
(Rps::Paper, Outcome::Lose) => Rps::Rock,
(Rps::Scissors, Outcome::Lose) => Rps::Paper,
(Rps::Rock, Outcome::Win) => Rps::Paper,
(Rps::Paper, Outcome::Win) => Rps::Scissors,
(Rps::Scissors, Outcome::Win) => Rps::Rock,
}
}
}
impl FromStr for Rps {
type Err = ();
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"A" | "X" => Ok(Rps::Rock),
"B" | "Y" => Ok(Rps::Paper),
"C" | "Z" => Ok(Rps::Scissors),
_ => Err(()),
}
}
}
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
enum Outcome {
Lose,
Draw,
Win,
}
impl Outcome {
fn score(&self) -> u64 {
match self {
Outcome::Lose => 0,
Outcome::Draw => 3,
Outcome::Win => 6,
}
}
}
impl FromStr for Outcome {
type Err = ();
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"X" => Ok(Outcome::Lose),
"Y" => Ok(Outcome::Draw),
"Z" => Ok(Outcome::Win),
_ => Err(()),
}
}
}
fn main() {
let mut data = String::new();
stdin().read_to_string(&mut data).unwrap();
let mut sum1 = 0u64;
let mut sum2 = 0u64;
for line in data.lines() {
let parts: Vec<_> = line.split_whitespace().collect();
let other: Rps = parts[0].parse().unwrap();
{
let me: Rps = parts[1].parse().unwrap();
let outcome = me.outcome_against(other);
sum1 += me.score() + outcome.score();
}
{
let outcome = parts[1].parse().unwrap();
let me = other.with_outcome(outcome);
sum2 += me.score() + outcome.score();
}
}
println!("{}", sum1);
println!("{}", sum2);
}

4
Cargo.lock generated
View file

@ -465,6 +465,10 @@ dependencies = [
name = "rust_2022_01" name = "rust_2022_01"
version = "0.1.0" version = "0.1.0"
[[package]]
name = "rust_2022_02"
version = "0.1.0"
[[package]] [[package]]
name = "ryu" name = "ryu"
version = "1.0.11" version = "1.0.11"

View file

@ -10,4 +10,5 @@ members = [
"2021/day16/rust", "2021/day16/rust",
"2021/day22/rust", "2021/day22/rust",
"2022/day1/rust", "2022/day1/rust",
"2022/day2/rust",
] ]