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Add day 10 

Ugly for now
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kageru 2021-12-10 14:08:55 +01:00
parent ed3b0b579c
commit 2103005872
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<[<<<<[{[<({{({}<>)<[]{}>}[<<>{}>{<>{}}]}{(({}<>){()<>}){{[]<>}{[]}}})>([{{(()[])[{}()]}}(<{{}<>}
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#![feature(test)]
extern crate test;
use aoc2021::common::*;
const DAY: usize = 10;
type Parsed<'a> = Vec<&'a str>;
fn parse_input(raw: &str) -> Parsed {
raw.lines().collect()
}
fn solve(parsed: &Parsed) -> (usize, usize) {
let mut points = 0;
let mut p2_points = Vec::new();
for &line in parsed {
let mut stack = Vec::new();
let mut invalid = false;
for c in line.bytes() {
match c {
b'(' | b'[' | b'<' | b'{' => stack.push(c),
b')' if stack.last() == Some(&b'(') => {
stack.pop();
}
b']' if stack.last() == Some(&b'[') => {
stack.pop();
}
b'>' if stack.last() == Some(&b'<') => {
stack.pop();
}
b'}' if stack.last() == Some(&b'{') => {
stack.pop();
}
b')' => {
points += 3;
invalid = true;
break;
}
b']' => {
points += 57;
invalid = true;
break;
}
b'}' => {
points += 1197;
invalid = true;
break;
}
b'>' => {
points += 25137;
invalid = true;
break;
}
_ => unreachable!(),
}
}
if invalid {
continue;
}
p2_points.push(autocomplete_points(stack));
}
let p2_len = p2_points.len();
(points, *p2_points.select_nth_unstable(p2_len / 2).1)
}
fn autocomplete_points(stack: Vec<u8>) -> usize {
let mut points = 0;
for p in stack.into_iter().rev() {
points *= 5;
match p {
b'(' => points += 1,
b'[' => points += 2,
b'{' => points += 3,
b'<' => points += 4,
_ => unreachable!(),
}
}
points
}
fn main() {
let raw = read_file(DAY);
let input = parse_input(&raw);
let (p1, p2) = solve(&input);
println!("Part 1: {p1}");
println!("Part 2: {p2}");
}
#[cfg(test)]
mod tests {
use super::*;
use aoc2021::*;
const TEST_INPUT: &str = "[({(<(())[]>[[{[]{<()<>>
[(()[<>])]({[<{<<[]>>(
{([(<{}[<>[]}>{[]{[(<()>
(((({<>}<{<{<>}{[]{[]{}
[[<[([]))<([[{}[[()]]]
[{[{({}]{}}([{[{{{}}([]
{<[[]]>}<{[{[{[]{()[[[]
[<(<(<(<{}))><([]([]()
<{([([[(<>()){}]>(<<{{
<{([{{}}[<[[[<>{}]]]>[]]";
#[test]
fn test_autocomplete_points() {
assert_eq!(autocomplete_points(vec![b'<', b'{', b'(', b'[']), 294);
}
#[test]
fn part1_test() {
let input = parse_input(TEST_INPUT);
assert_eq!(solve(&input).0, 26397);
}
#[test]
fn part2_test() {
let input = parse_input(TEST_INPUT);
assert_eq!(solve(&input).1, 288957);
}
#[bench]
fn bench_solution(b: &mut test::Bencher) {
let raw = read_file(DAY);
let input = parse_input(&raw);
b.iter(|| assert_eq!(solve(test::black_box(&input)), (358737, 4329504793)))
}
bench_input!(Vec::len => 90);
}