Fortune for day3's current commit: Future small blessing − 末小吉day3-part2
parent
b6d4da87fe
commit
57bb493815
GPG Key ID:
284488987C31F630
@ -0,0 +1,181 @@
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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"cc",
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"cfg-if",
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"libc",
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"miniz_oxide",
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"object",
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"rustc-demangle",
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"backtrace",
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"eyre",
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"indenter",
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"once_cell",
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"owo-colors",
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]
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[[package]]
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name = "day3"
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"color-eyre",
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"lazy_static",
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"linebuffer",
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"smallmap",
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]
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"indenter",
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source = "registry+https://github.com/rust-lang/crates.io-index"
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name = "lazy_static"
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name = "libc"
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name = "linebuffer"
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version = "0.1.0"
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[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"memchr",
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]
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[[package]]
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name = "once_cell"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"semver",
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]
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[[package]]
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name = "semver"
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version = "0.9.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
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dependencies = [
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"semver-parser",
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]
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[[package]]
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name = "semver-parser"
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version = "0.7.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
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[[package]]
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name = "smallmap"
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version = "1.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "2df0ae8eb5af9e6e00be6ba531cc6860ba93d5226d6d1d4f80ead510a5d6296e"
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dependencies = [
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"rustc_version",
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]
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@ -0,0 +1,23 @@
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[package]
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name = "day3"
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version = "0.1.0"
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edition = "2021"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[profile.release]
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opt-level = 3
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lto = "fat"
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codegen-units = 1
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strip = true
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[profile.prof]
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inherits="release"
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strip = false
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[dependencies]
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color-eyre = { version = "0.6.2", default-features = false }
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lazy_static = "1.4.0"
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linebuffer = { path = "/home/avril/work/linebuffer" }
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smallmap = "1.4.0"
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@ -0,0 +1,32 @@
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//! Extensions
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use super::*;
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use std::{
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iter::{self, Fuse,}
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};
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pub trait TaekTwoExt: Iterator
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{
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fn take_two(self) -> TakeTwo<Self>;
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}
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#[derive(Debug, Clone)]
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pub struct TakeTwo<I: ?Sized + Iterator>(I);
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impl<T, I: Iterator<Item=T> + ?Sized> Iterator for TakeTwo<I>
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{
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type Item = (T, Option<T>);
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#[inline]
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fn next(&mut self) -> Option<Self::Item>
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{
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let first = self.0.next()?;
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Some((first, self.0.next()))
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}
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}
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impl<I: Iterator> TaekTwoExt for I
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where I: Iterator + Sized
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{
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#[inline]
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fn take_two(self) -> TakeTwo<Self> {
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TakeTwo(self)
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}
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}
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@ -0,0 +1,117 @@
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#[macro_use] extern crate lazy_static;
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use smallmap::{
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Map,
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smallmap,
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};
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use std::{
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collections::BTreeSet,
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};
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use linebuffer::{
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buf::forward,
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TryFromBuf,
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FromBuf,
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ParsedLines,
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};
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use color_eyre::{
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eyre::{
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self, eyre,
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WrapErr as _,
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},
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Help as _, SectionExt as _,
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};
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mod ext;
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pub use ext::*;
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fn init() -> eyre::Result<()>
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{
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color_eyre::install()
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}
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#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
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struct Sack {
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split_by: usize,
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containers: Vec<BTreeSet<char>>,
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full: BTreeSet<char>,
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}
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impl Sack
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{
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/// Compute the intersection of each `N` part of the container
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pub fn intersection(&self) -> impl Iterator<Item = char> + '_
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{
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self.containers.iter().take_two().flat_map(|(a, b)| b.map(move |b| (a, b)))
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.map(|(a, b)| a.intersection(b)).flatten().copied()
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}
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}
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#[inline]
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fn read_input_from<R: std::io::Read>(input: R) -> ParsedLines<R, forward::FromStr<Sack>>
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{
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ParsedLines::new(input)
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}
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fn read_input() -> eyre::Result<ParsedLines<impl std::io::Read + 'static, forward::FromStr<Sack>>>
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{
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let reader = std::fs::OpenOptions::new()
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.read(true)
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.open("input")
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.wrap_err("Failed to open input file for reading")?;
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Ok(read_input_from(reader))
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}
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#[derive(Debug)]
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pub struct SackParseError{
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expected_div: usize,
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size: usize,
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}
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impl std::str::FromStr for Sack
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{
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type Err = SackParseError;
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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let (first, second) = s.split_at(s.len()/2);
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Ok(Self {
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split_by: 2,
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containers: vec![
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first.chars().collect(),
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second.chars().collect(),
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],
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full: s.chars().collect(),
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})
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}
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}
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#[inline]
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fn prop_swivle<'a>(sigh: impl IntoIterator<Item = char>+ 'a) -> impl Iterator<Item = usize> + 'a
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{
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lazy_static! {
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static ref PMAP: Map<char, usize> = ('a'..='z').enumerate().map(|(i, n)| (i+1, n))
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.chain (('A'..='Z').enumerate().map(|(i, n)| (i + 27, n)))
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.map(|(i, n)| (n, i))
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.collect();
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}
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sigh.into_iter().map(|ref ch| PMAP.get(ch)).flat_map(std::convert::identity).copied()
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}
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fn main() -> eyre::Result<()> {
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init().wrap_err("Panic hook failed to install")?;
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let mut input = read_input()?;
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let mut psum = 0;
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while let Some(sack) = input.try_next()
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{
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let sack = sack.expect("Failed to parse input line");
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psum += prop_swivle(sack.intersection())
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.sum::<usize>();
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// TODO: part2: find sack.full's intersection through *all other* lines, up to two where the intersection is exactly 1 between all three. This is boring, I give up.
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}
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println!("{psum}");
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Ok(())
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}
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Reference in new issue