add 2023/03/1
This commit is contained in:
parent
db91d6dcc3
commit
be085ab131
140
2023/inputs/day03
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140
2023/inputs/day03
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......429...836..$............../..960........*.............+..........*...=....381.....*........67......426.....=..../...304...............
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64
2023/src/bin/day03.rs
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64
2023/src/bin/day03.rs
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#![feature(test, try_blocks)]
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extern crate test;
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use aoc2023::{
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boilerplate,
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common::*,
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grid::{Position2D, PositionND},
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};
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use itertools::Itertools;
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const DAY: usize = 3;
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type Parsed<'a> = Vec<&'a [u8]>;
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fn parse_input(raw: &str) -> Parsed {
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raw.lines().map(|l| l.as_bytes()).collect()
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}
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fn part1(parsed: &Parsed) -> usize {
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let number_positions = parsed
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.iter()
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.enumerate()
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.flat_map(|(x, l)| l.iter().enumerate().filter_map(move |(y, c)| matches!(c, b'0'..=b'9').then_some((x, y..=y))))
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.coalesce(
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|(x1, y1), (x2, y2)| if y1.end() + 1 == *y2.start() { Ok((x1, *y1.start()..=*y2.end())) } else { Err(((x1, y1), (x2, y2))) },
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)
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.collect_vec();
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let mut sum = 0usize;
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for (x, ys) in number_positions {
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let start = Position2D::from([x, *ys.start()]);
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let end = Position2D::from([x, *ys.end()]);
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if start
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.neighbors()
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.into_iter()
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.chain(end.neighbors())
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.any(|PositionND([x, y])| !matches!(parsed.get(x as usize).and_then(|ys| ys.get(y as usize)), Some(b'0'..=b'9' | b'.') | None))
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{
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sum += String::from_utf8_lossy(&parsed[x][ys]).parse::<usize>().unwrap();
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}
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}
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sum
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}
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fn part2(parsed: &Parsed) -> usize {
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unimplemented!()
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}
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boilerplate! {
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TEST_INPUT == "467..114..
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...*......
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..35..633.
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......#...
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617*......
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.....+.58.
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......755.
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...$.*....
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.664.598..",
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tests: {
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part1: { TEST_INPUT => 4361 },
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part2: { TEST_INPUT => 0 },
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},
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bench1 == 536202,
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bench2 == 0,
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bench_parse: Vec::len => 0,
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}
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Loading…
Reference in New Issue
Block a user