aoc - heh


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#![allow(
    confusable_idents,
    uncommon_codepoints,
    non_upper_case_globals,
    internal_features,
    mixed_script_confusables,
    static_mut_refs,
    incomplete_features
)]
#![feature(
    slice_swap_unchecked,
    generic_const_exprs,
    iter_array_chunks,
    get_many_mut,
    maybe_uninit_uninit_array,
    iter_collect_into,
    let_chains,
    anonymous_lifetime_in_impl_trait,
    array_windows,
    slice_take,
    test,
    slice_as_chunks,
    array_chunks,
    slice_split_once,
    core_intrinsics
)]
extern crate test;
pub mod util;
use atools::prelude::*;
use hinted::HintExt;
pub use util::prelude::*;
fn p1(i: &str) -> impl Display {
    static mut a: [i32; 1000] = [0; 1000];
    static mut b: [i32; 1000] = [0; 1000];

    let i = i.as_bytes();
    unsafe {
        for n in 0..1000 {
            let i = C! { &i[n * 14..] };
            let n1 = reading::八(
                u64::from_le_bytes(util::nail(C! { &i[..8] })) << 24 | (0x3030303030303030 & !24),
            ) as i32;
            let n2 = reading::八(u64::from_le_bytes(util::nail(C! { &i[5..]}))) as i32;

            *a.get_unchecked_mut(n) = n1;
            *b.get_unchecked_mut(n) = n2;
        }
        radsort::sort(&mut a);
        radsort::sort(&mut b);
        a.iter()
            .copied()
            .zip(b)
            .map(|(x, y)| (x - y).abs())
            .sum::<i32>()
    }
}

pub fn run(i: &str) -> impl Display {
    static mut a: [u32; 1000] = [0; 1000];
    static mut map: [u32; 100000] = [0; 100000];
    let i = i.as_bytes();

    unsafe {
        let x = C! { &i[..14] };
        let (x, y) = (reading::all(&x[0..5]), reading::all::<u32>(&x[8..13]));
        *a.get_unchecked_mut(0) = x;
        *map.get_unchecked_mut(y as usize) += 1;

        for n in 1..1000 {
            let x = util::reading::八(
                u64::from_le_bytes(util::nail::<8>(i.get_unchecked(n * 14 - 3..)))
                    & 0xffffffffff000000,
            );
            let y = util::reading::八(u64::from_le_bytes(util::nail::<8>(
                i.get_unchecked(n * 14 + 5..),
            )));
            *a.get_unchecked_mut(n) = x as u32;
            *map.get_unchecked_mut(y as usize) += 1;
        }
        a.iter()
            .copied()
            .map(|x| x * map.get_unchecked(x as usize))
            .sum::<u32>()
    }

    // let (mut a, b) = i
    //     .行()
    //     .map(|x| x.κ::<u32>().carr().tuple())
    //     .collect::<(Vec<_>, Vec<u32>)>();
    // let mut map = HashMap::<u32, u32>::default();
    // for elem in b {
    //     map.entry(elem).and_modify(|x| *x += 1).or_insert(1);
    // }
    // a.sort_unstable();
    // a.iter().map(|x| x * map.get(x).unwrap_or(&0)).sum::<u32>()
}

fn main() {
    // let mut s = String::new();
    // for i in 0..1280 {
    let i = include_str!("inp.txt");
    //     s.push_str(i);
    // }
    // std::fs::write("src/inp.txt", s);
    println!("{}", p1(i));
    // println!("{}", experiment(i));
    println!("{}", run(i));
}

#[bench]
fn bench(b: &mut test::Bencher) {
    let i = boxd(include_str!("inp.txt").trim());
    b.iter(|| run(i));
}

#[bench]
fn bench2(b: &mut test::Bencher) {
    let i = boxd(include_str!("inp.txt").trim());
    b.iter(|| p1(i));
}