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2022 day10/rust: cleanup

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This commit is contained in:
Xiretza 2022-12-10 06:38:47 +01:00
parent e0ff12f770
commit 135a5017f7
1 changed files with 10 additions and 13 deletions
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23
2022/day10/rust/src/main.rs
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@ -2,11 +2,10 @@
use std::{
io::{stdin, Read},
iter,
str::FromStr,
};
use aoc::*;
enum Instruction {
Noop,
Addx(i32),
@ -17,10 +16,10 @@ impl FromStr for Instruction {
fn from_str(s: &str) -> Result<Self, Self::Err> {
let mut args = s.split_whitespace();
match args.next().unwrap() {
match args.next().ok_or(())? {
"noop" => Ok(Self::Noop),
"addx" => {
let i = args.next().unwrap().parse().unwrap();
let i = args.next().ok_or(())?.parse().map_err(|_| ())?;
Ok(Self::Addx(i))
}
_ => Err(()),
@ -43,27 +42,25 @@ fn main() {
*acc += i;
Some(*acc)
});
let values = [1, 1]
.into_iter()
let values = iter::once(1)
.chain(values)
.enumerate()
.map(|(i, x)| (i32::try_from(i).unwrap(), x));
.map(|(i, x)| (i32::try_from(i).unwrap() + 1, x));
let sum: i32 = values
.clone()
.skip(20)
.skip(20 - 1)
.step_by(40)
.map(|(i, x)| i * x)
.sum();
println!("{:?}", sum);
let crt: Vec<_> = values
.skip(1)
.map(|(i, x)| ((i - 1) % 40 - x).abs() < 2)
.map(|(i, x)| ((i - 1) % 40).abs_diff(x) < 2)
.map(|x| if x { '#' } else { '.' })
.collect();
let (_, crt) = crt.split_last().unwrap();
println!("{:?}", sum);
for line in crt.chunks(40) {
for line in crt.chunks_exact(40) {
println!("{}", line.iter().collect::<String>());
}
}