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Last active December 6, 2022 15:58
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AoC 2022 day06b extra p{1..94}
[package]
name = "day06b"
version = "0.1.0"
authors = ["Tim Visee <3a4fb3964f@sinenomine.email>"]
edition = "2021"
[dependencies]
rayon = "1.6"
[profile.release]
codegen-units = 1
lto = true
strip = true
panic = "abort"
use rayon::prelude::*;
const DATA: &[u8; 10_000_000] = include_bytes!("../input_extra.txt");
pub fn main() {
println!("{}", (2..=94).into_par_iter().map(p).sum::<usize>() + 1);
}
#[inline]
fn p(n: usize) -> usize {
let mut w = 0;
'main: loop {
let mut seen = 0u128;
for i in (1..=n).rev() {
let mask = 1 << DATA[w + i];
if seen & mask == mask {
w += i;
continue 'main;
}
seen |= mask;
}
return w + n + 1;
}
}
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