2022 day10/rust: add solution

This commit is contained in:
Xiretza 2022-12-10 06:29:51 +01:00
parent 6cae81cd65
commit e0ff12f770
4 changed files with 86 additions and 0 deletions

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@ -0,0 +1,9 @@
[package]
name = "rust_2022_10"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
aoc = { path = "../../../common/rust" }

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@ -0,0 +1,69 @@
#![warn(clippy::pedantic)]
use std::{
io::{stdin, Read},
str::FromStr,
};
use aoc::*;
enum Instruction {
Noop,
Addx(i32),
}
impl FromStr for Instruction {
type Err = ();
fn from_str(s: &str) -> Result<Self, Self::Err> {
let mut args = s.split_whitespace();
match args.next().unwrap() {
"noop" => Ok(Self::Noop),
"addx" => {
let i = args.next().unwrap().parse().unwrap();
Ok(Self::Addx(i))
}
_ => Err(()),
}
}
}
fn main() {
let mut data = String::new();
stdin().read_to_string(&mut data).unwrap();
let values = data
.lines()
.map(|l| l.parse().unwrap())
.flat_map(|i: Instruction| match i {
Instruction::Noop => vec![0],
Instruction::Addx(i) => vec![0, i],
})
.scan(1, |acc, i| {
*acc += i;
Some(*acc)
});
let values = [1, 1]
.into_iter()
.chain(values)
.enumerate()
.map(|(i, x)| (i32::try_from(i).unwrap(), x));
let sum: i32 = values
.clone()
.skip(20)
.step_by(40)
.map(|(i, x)| i * x)
.sum();
let crt: Vec<_> = values
.skip(1)
.map(|(i, x)| ((i - 1) % 40 - x).abs() < 2)
.map(|x| if x { '#' } else { '.' })
.collect();
let (_, crt) = crt.split_last().unwrap();
println!("{:?}", sum);
for line in crt.chunks(40) {
println!("{}", line.iter().collect::<String>());
}
}

7
Cargo.lock generated
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@ -531,6 +531,13 @@ dependencies = [
"aoc", "aoc",
] ]
[[package]]
name = "rust_2022_10"
version = "0.1.0"
dependencies = [
"aoc",
]
[[package]] [[package]]
name = "ryu" name = "ryu"
version = "1.0.11" version = "1.0.11"

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@ -19,4 +19,5 @@ members = [
"2022/day7/rust", "2022/day7/rust",
"2022/day8/rust", "2022/day8/rust",
"2022/day9/rust", "2022/day9/rust",
"2022/day10/rust",
] ]