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AoC 2022 day06b extra p{1..94}
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[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" |
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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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