mirror of
https://github.com/wezm/advent-of-code.git
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Day 3 2018
This commit is contained in:
parent
f78231443c
commit
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4 changed files with 1544 additions and 0 deletions
92
2018/Cargo.lock
generated
92
2018/Cargo.lock
generated
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@ -1,4 +1,96 @@
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[[package]]
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name = "advent-of-code"
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version = "0.1.0"
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dependencies = [
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"lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "aho-corasick"
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version = "0.6.9"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"memchr 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "cfg-if"
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version = "0.1.6"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "lazy_static"
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version = "1.2.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "libc"
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version = "0.2.44"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "memchr"
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version = "2.1.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
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"version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "regex"
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version = "1.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"aho-corasick 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"memchr 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"regex-syntax 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "regex-syntax"
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version = "0.6.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "thread_local"
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version = "0.3.6"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "ucd-util"
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version = "0.1.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "utf8-ranges"
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version = "1.0.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "version_check"
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version = "0.1.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[metadata]
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"checksum aho-corasick 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)" = "1e9a933f4e58658d7b12defcf96dc5c720f20832deebe3e0a19efd3b6aaeeb9e"
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"checksum cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "082bb9b28e00d3c9d39cc03e64ce4cea0f1bb9b3fde493f0cbc008472d22bdf4"
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"checksum lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a374c89b9db55895453a74c1e38861d9deec0b01b405a82516e9d5de4820dea1"
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"checksum libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)" = "10923947f84a519a45c8fefb7dd1b3e8c08747993381adee176d7a82b4195311"
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"checksum memchr 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0a3eb002f0535929f1199681417029ebea04aadc0c7a4224b46be99c7f5d6a16"
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"checksum regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "37e7cbbd370869ce2e8dff25c7018702d10b21a20ef7135316f8daecd6c25b7f"
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"checksum regex-syntax 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "4e47a2ed29da7a9e1960e1639e7a982e6edc6d49be308a3b02daf511504a16d1"
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"checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
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"checksum ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "535c204ee4d8434478593480b8f86ab45ec9aae0e83c568ca81abf0fd0e88f86"
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"checksum utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "796f7e48bef87609f7ade7e06495a87d5cd06c7866e6a5cbfceffc558a243737"
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"checksum version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
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@ -4,3 +4,5 @@ version = "0.1.0"
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authors = ["Wesley Moore <wes@wezm.net>"]
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[dependencies]
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lazy_static = "1.2.0"
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regex = "1.1.0"
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1331
2018/input/2018/day3.txt
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1331
2018/input/2018/day3.txt
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File diff suppressed because it is too large
Load diff
119
2018/src/bin/day3.rs
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119
2018/src/bin/day3.rs
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@ -0,0 +1,119 @@
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#[macro_use]
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extern crate lazy_static;
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extern crate regex;
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use regex::Regex;
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use std::fs;
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const FABRIC_SIZE: usize = 1000;
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#[derive(Clone)]
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struct Rect {
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x: u32,
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y: u32,
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width: u32,
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height: u32,
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}
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#[derive(Clone)]
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struct Claim {
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id: u32,
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rect: Rect,
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}
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fn main() {
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let input = fs::read_to_string("input/2018/day3.txt").expect("input");
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let claims = input
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.lines()
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.map(parse_claim)
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.collect::<Option<Vec<_>>>()
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.expect("input error");
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let fabric = claim_counts(&claims);
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part1(&fabric);
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part2(&fabric);
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}
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fn part1<'a>(input: &[Vec<&'a Claim>]) {
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let over_two_claims = input.into_iter().filter(|claims| claims.len() >= 2).count();
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println!("{}", over_two_claims);
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}
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fn part2<'a>(input: &[Vec<&'a Claim>]) {
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let non_overlapping_claim = input
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.into_iter()
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.filter_map(|claims| {
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if claims.len() == 1 {
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Some(claims[0])
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} else {
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None
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}
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}).find(|candidate| winner(input, candidate))
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.expect("did not find non-overlapping claim");
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println!("{}", non_overlapping_claim.id);
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}
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fn parse_claim(line: &str) -> Option<Claim> {
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lazy_static! {
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static ref RE: Regex = Regex::new(r#"\A#(\d+) @ (\d+),(\d+): (\d+)x(\d+)\z"#).unwrap();
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}
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let captures = RE.captures(line)?;
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let id = captures[1].parse().ok()?;
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let x = captures[2].parse().ok()?;
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let y = captures[3].parse().ok()?;
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let width = captures[4].parse().ok()?;
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let height = captures[5].parse().ok()?;
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Some(Claim {
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id,
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rect: Rect {
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x,
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y,
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width,
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height,
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},
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})
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}
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fn claim_counts<'a>(claims: &'a [Claim]) -> Vec<Vec<&'a Claim>> {
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let mut claim_counts = vec![Vec::new(); FABRIC_SIZE * FABRIC_SIZE];
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for claim in claims {
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for y in claim.rect.y..claim.rect.max_y() {
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for x in claim.rect.x..claim.rect.max_x() {
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let existing = claim_counts
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.get_mut(y as usize * FABRIC_SIZE + x as usize)
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.unwrap();
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existing.push(claim)
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}
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}
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}
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claim_counts
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}
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fn winner<'a>(claims: &[Vec<&'a Claim>], candidate: &Claim) -> bool {
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for y in candidate.rect.y..candidate.rect.max_y() {
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for x in candidate.rect.x..candidate.rect.max_x() {
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if claims[y as usize * FABRIC_SIZE + x as usize].len() != 1 {
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return false;
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}
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}
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}
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true
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}
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impl Rect {
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fn max_x(&self) -> u32 {
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self.x + self.width
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}
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fn max_y(&self) -> u32 {
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self.y + self.height
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}
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}
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