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dbd12f59f1
...
09be63205f
3 changed files with 0 additions and 260 deletions
140
inputs/day3.txt
140
inputs/day3.txt
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....929...299....................*.................249........-...........*.373.....*.............*.....*.*....*.............549............
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.../..........864.683.215....*......%.........702..166..46..........&....341..........694..496.......528.%...........839...105..*...887.....
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...........@....594.........................*..........*675...........345..52...$..................-..............899.........804.$.........
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.................*................835....................578......*502...............*..416.............................................391.
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....610&...514...501......./........*....*71.........../.......674......925...............*.869.....966........393................/.687.*...
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............*...............786...248.104........92.633.....%..............*104...&466..138..@.........*.525...+......974......339..=...260.
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....372/.889..............................55.406........134..250.=228..609...........................69...............*.....................
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...........................................*........976...*...........=.......357...........................191.....150.....................
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...-...........595.634.........*396......592..594......*......411.856...760....../..................201.....#...709................168......
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.936..236.........*....@....436.....100....../......35...../.....*........*....................917%............*.....................*..#63.
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.......*..............542..........................*........689.........26....667.&...................738....831..$.............513.53......
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........10.....529........*250..........162.......390...........................*..70.............................701..........*............
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..355.........&........394......301@..........542..............................142..........%..............%..........*.....507.............
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.....*.........................................*.....%..283.....*.........997&.......@670....402..........808......308.459.......712...152..
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..291......246.@....+986.....336/.......976...468.264...*....739.187.............................................................*.....*....
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........../....46...................186.$..............674............................227......-............975...............436.......492.
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...................706......=......415..................=.199......235......*...47........................72.607...................443......
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......277......320.............937.....*.....+....632...........&374..............................*....................898.....642%.........
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.........#....................*.......716....229./.........................$................934...233...............98............../.......
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.....*........-659..457.........964...................659....786....619.666........277...@.....*......930*460..618...........910..265.......
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..794...487....&..81...........*...................@............666@.....*981.937.............*.....%..........888....+...81................
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...619.977.........859..#....235....230*......*..............429........335....-.......*......631.......=.......27...................192....
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.......*............=...........&.........121..680.195.959......*417.....*..938.............../..........739..#..............194.750........
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....309...439.............14...............*..........*...............723.........163..748...........853.....885.........175*........487....
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................383............/......................*...................@....348............*.....*.......*........./...*...811.......*158
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.....680.........871....17+................117.................*.............506..................#...410...................616.........519.
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....&..........40.......86.122..........&....450....................1....202............42...51....*..............*.....215.................
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................64%....704...928.........470...125............*....708.15...*.............193.......*........641....*......687..............
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........$..............*...................&.....*..........582......*....652.@358..643..........125.....458........168....$.......$194.....
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........293.........305......417...............117....................612............*......262.............*903............................
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.....$...................615*..........581.........335...139..505.419.............656.........+.......506................710.....956........
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776..110.....+............................-........#..........*....*...447......*......................*...*.....938.366*.......#....376....
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.................669$.......$.......=............*220./.....+665........495................*.@103....992....................&........600....
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.......*......................812/.........................................$............940...........+...................146...975.........
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....410.650.282.....*...............696.833....957...............996...*......772.287...................921..935................%.....$.....
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............*....413.921...713....................%.....769.........@.390.216..#.....@..........................=...........*.......46......
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.....798.136..............%....150.....236..............*......31...........*..........@.64..17......616..........901......344..............
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..947+....36....270....*............517....521..258.*............108..812.............*................*........................*372........
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857.........843............*........794......................677..27........................121...........670.........548.837*....&.....664.
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....*..400...........810=.300@...13.15.537.....997........./......*.....*.........+.........407.758...674............604....500.............
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..970..........409...............*...*...*................159...788....338..............636*...../....#.......#895....*......./.............
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...103............284......./...999....................=.....640.....284..............566.982..........$...........476...478.793..556.......
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...............*.404=.....*910..703@...20......266......815.....201.....54.332...........................@......*...........95..............
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.............898........................*........*..........13.....*806...*.......280.........................905........63*................
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....$....518.......@......*......*..323..............-............477....*4...*...........*....979......810.................366....697......
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.....+......-...557.349...........217............................./105..........527..387....394...*...........#..430*.....501.......393.190.
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.403............492..97.@.....695..696......$.840..&.................21.....................@.........*.......178...+....$.............364..
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.....62.....#689.*.........*.................................444.......*...*......*.............445..861...........498/.857..*.....505*.....
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994..797.........684.390....*....452../..................989..728............685....23+.856...........498.............443...................
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110
src/bin/day3.rs
110
src/bin/day3.rs
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@ -1,110 +0,0 @@
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#![forbid(elided_lifetimes_in_paths, unsafe_code)]
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use aoc23::read;
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use chumsky::{prelude::*, text::int};
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use std::collections::HashMap;
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enum Entity {
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Void,
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Symbol(char),
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Number { num: usize, len: usize }
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}
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impl Entity {
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fn len(&self) -> usize {
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match self {
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Self::Void | Self::Symbol(_) => 1,
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Self::Number { len, .. } => *len
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}
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}
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fn parser() -> impl Parser<char, Self, Error = Simple<char>> {
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choice((
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just('.').map(|_| Self::Void),
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int(10).map(|num: String| Self::Number {
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num: num.parse().unwrap(),
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len: num.len()
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}),
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none_of(['\n']).map(Self::Symbol)
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))
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}
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}
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struct Line {
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entities: HashMap<usize, Entity>
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}
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impl Line {
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fn parser() -> impl Parser<char, Self, Error = Simple<char>> {
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Entity::parser().repeated().map(|line| {
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let mut col = 0;
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let mut entities = HashMap::new();
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for ent in line {
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let len = ent.len();
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entities.insert(col, ent);
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col += len;
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}
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Line { entities }
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})
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}
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}
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fn parser() -> impl Parser<char, Vec<Line>, Error = Simple<char>> {
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Line::parser()
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.then_ignore(just("\n"))
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.repeated()
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.then_ignore(end())
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}
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fn main() -> anyhow::Result<()> {
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let grid = read("inputs/day3.txt", parser())?;
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let mut sum = 0;
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let mut possible_gears: HashMap<(usize, usize), Vec<usize>> = HashMap::new();
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for (i, line) in grid.iter().enumerate() {
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for (col, ent) in &line.entities {
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let Entity::Number { num, len } = ent else {
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continue;
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};
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let mut adjacent = false;
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for search_row in i.saturating_sub(1) ..= i + 1 {
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|
||||||
let Some(row) = grid.get(search_row) else {
|
|
||||||
continue;
|
|
||||||
};
|
|
||||||
for search_col in col.saturating_sub(1) ..= col + len {
|
|
||||||
if let Some(Entity::Symbol(symbol)) = row.entities.get(&search_col) {
|
|
||||||
adjacent = true;
|
|
||||||
if *symbol == '*' {
|
|
||||||
possible_gears
|
|
||||||
.entry((search_row, search_col))
|
|
||||||
.or_default()
|
|
||||||
.push(*num);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
if adjacent {
|
|
||||||
sum += num;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
println!("{sum}");
|
|
||||||
println!(
|
|
||||||
"{}",
|
|
||||||
possible_gears
|
|
||||||
.values()
|
|
||||||
.filter_map(|nums| {
|
|
||||||
let mut nums = nums.iter();
|
|
||||||
let ratio = nums.next()? * nums.next()?;
|
|
||||||
let None = nums.next() else {
|
|
||||||
return None;
|
|
||||||
};
|
|
||||||
Some(ratio)
|
|
||||||
})
|
|
||||||
.sum::<usize>()
|
|
||||||
);
|
|
||||||
|
|
||||||
Ok(())
|
|
||||||
}
|
|
||||||
10
src/lib.rs
10
src/lib.rs
|
|
@ -70,13 +70,3 @@ where
|
||||||
anyhow!("Failed to parse input")
|
anyhow!("Failed to parse input")
|
||||||
})
|
})
|
||||||
}
|
}
|
||||||
|
|
||||||
pub fn read_from_str<C, T>(from: &str, parser: C) -> anyhow::Result<T>
|
|
||||||
where
|
|
||||||
C: Parser<char, T, Error = Simple<char>>
|
|
||||||
{
|
|
||||||
parser.parse(from).map_err(|errors| {
|
|
||||||
report_err(from, "<input>", errors);
|
|
||||||
anyhow!("Failed to parse input")
|
|
||||||
})
|
|
||||||
}
|
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue