feat: day 3
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e82c119589
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GPG key ID:
83B789081A0878FB
3 changed files with 317 additions and 0 deletions
140
.aoc-cache/3.txt
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140
.aoc-cache/3.txt
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............830..743.......59..955.......663..........................................367...........895....899...............826...220......
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.......284.....*............*.....$...+.....*...377..................*.......419.............488...*.......*...................*..-....939..
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....%.........976..679.461.7..........350..33.........$.380...$...151.897..........295..#......*....105.....418.............481........&....
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...992.....#......=...../........701................508...*..578........................259...331.................795..945........79........
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........360......471........../.........573-.702.............866...@...........*......772....../........259....*.........430....136.742.543.
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.............-..........340.................103....*..........$...51*..................74................438......%...776...+.23*..663......
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......................448........489................*.................................*....440...889...715..........351.....39..............
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.138....../766...........*.......................152.........................377....599.......*...*...........................@.............
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...........................954.....*397.........................394...........614..307*74..457..............+.514.......................327.
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501-.......805..........285...*..................6....335.167...*........18...332.............741...127......+.............246..............
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......616.......752*276.....470.848..599.........*............779..=................539...961..$.........204.......-..201*.....%............
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......150...................................+..70.565=.&320.........983....155................=.....54.......%............*....@......../...
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568-...@.552%....-.-................*.................957................93......74...........*........156.566../....#...........285........
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.....565..............693....443......................*....394.@58...362...................383.583.............542.38............./..890....
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..612..459..........462....663......125....................720..............355.....253...............904......................*............
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............&.999....&.......................%........240....295*681.846....53.....806......793..646....626./76..737....479.........558.@...
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.........892..#.......885.....804..587*....340.........*..............%............*.........*..........*................%............/.....
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660..635...........-............./.....213........$....512.....551.............*....910........................@............................
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........*..........361..270*.....................328..............*.........853........................*.....985...965............232...948.
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..501@......................213...412$.....375..................631..916.......................254...284.........#....*..252........*.......
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...................695............................872*876..622..........-.........*..575...851*..................910.395..*....*717.248.....
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.....91.........80....*..390...........497....496............*.......@.........297..*................&....873.............946.8.........647.
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.......*.424.......108.....=.............*..................686....418.............131........600.96.327...=...561...321............343*....
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.........811...=....................680...........167...*...601.....................892..#.......142*.......151..108............201.........
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................653........879....@.*.........%...*...699..*..............726............695.870.....526.$................*8............234.
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...*........*......450*............................................*...786.625.......804.850.....674..........305...........................
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..593.512....517.......155.....646*239....286......+...........96..264....*......471.*......*.........314*901..............879..............
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..........................................=.....419....820......&..................+.......163....148........................*....586.......
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.....331.....................637....126.................*..147............650...............................................315....*........
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.......%......................$....../.................392....@...943..34...*......752.............................161..30.........970.521..
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.........984.412#.......-.569...@................464....................*.275..&.....#.126*506....................*.......=.168-............
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.724..................570....*.914.388.........%..$.........274.......263.......130..............102.....2....21+.268....................226
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..........776=...6........759.......*..283..309.....682......$..........................................%........................446........
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........37.#..............14.......*........../.......586.............*........623.......129........324.....601...%.....@...................
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...165................#.........861............463.......*.......361*..............356........175.....*.........906.897..716....118..#......
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167
src/bin/day_3.rs
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167
src/bin/day_3.rs
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use aoc_2022::prelude::*;
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type Input = Vec<String>;
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fn parse(s: &str) -> Result<Input> {
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Ok(s.lines()
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.map(ToOwned::to_owned)
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.filter(|line| line.len() != 0)
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.collect::<Vec<_>>())
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}
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enum ScanState {
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WaitingForNumber {
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possible: bool,
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},
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ReadingNumber {
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progress: String,
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possible: bool,
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},
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}
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#[derive(Debug)]
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struct NumberSpan {
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value: u32,
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start_position: (usize, usize),
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length: usize,
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}
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impl NumberSpan {
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fn is_adjacent(&self, position: (usize, usize)) -> bool {
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let min_x = if self.start_position.0 > 0 {
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self.start_position.0 - 1
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} else {
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0
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};
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let max_x = self.start_position.0 + self.length;
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if position.0 < min_x || position.0 > max_x {
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return false;
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}
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if position.1 == self.start_position.1 {
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return true;
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}
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if position.1 >= 1 && (position.1 - 1) == self.start_position.1 {
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return true;
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}
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(position.1 + 1) == self.start_position.1
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}
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}
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struct PartSymbol {
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symbol: char,
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position: (usize, usize),
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}
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#[aoc(day = 3, parse = parse, test_cases = ["day_3.txt"])]
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fn day_3(mut input: Input) -> Result<()> {
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// Part 1
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println!("Part one: ");
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let spare = ".".repeat(input[0].len());
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let mut total = 0;
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let mut symbols = Vec::new();
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let mut spans = Vec::new();
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for y in 0..(input.len()) {
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let above = if y > 0 {
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&input[y - 1]
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} else {
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&spare
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};
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let below = if y < input.len() - 1 {
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&input[y + 1]
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} else {
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&spare
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};
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let current = &input[y];
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let mut state = ScanState::WaitingForNumber { possible: false };
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for (x, ((above_char, current_char), below_char)) in above.chars().zip(current.chars()).zip(below.chars()).enumerate() {
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if current_char != '.' && !current_char.is_numeric() {
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symbols.push(PartSymbol {
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position: (x, y),
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symbol: current_char,
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});
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}
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let now_possible = (above_char != '.' && !above_char.is_numeric()) || (below_char != '.' && !below_char.is_numeric());
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state = match state {
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ScanState::WaitingForNumber { possible } => {
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if current_char.is_numeric() {
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// transition to number state
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ScanState::ReadingNumber {
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progress: {
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let mut s = String::new();
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s.push(current_char);
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s
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},
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possible: possible | now_possible,
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}
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} else {
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ScanState::WaitingForNumber {
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possible: (current_char != '.') | now_possible,
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}
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}
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},
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ScanState::ReadingNumber { ref progress, possible } => {
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let mut progress = progress.clone();
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if current_char.is_numeric() {
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progress.push(current_char);
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ScanState::ReadingNumber {
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progress,
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possible: possible | now_possible,
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}
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} else {
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if possible | now_possible | (current_char != '.') {
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total += progress.parse::<u32>()?;
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spans.push(NumberSpan {
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start_position: (x - progress.len(), y),
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length: progress.len(),
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value: progress.parse()?,
|
||||
});
|
||||
ScanState::WaitingForNumber {
|
||||
possible: now_possible | (current_char != '.'),
|
||||
}
|
||||
} else {
|
||||
ScanState::WaitingForNumber { possible: now_possible }
|
||||
}
|
||||
}
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
if let ScanState::ReadingNumber { progress, possible } = state {
|
||||
if possible {
|
||||
total += progress.parse::<u32>()?;
|
||||
spans.push(NumberSpan {
|
||||
start_position: (current.len() - progress.len(), y),
|
||||
length: progress.len(),
|
||||
value: progress.parse()?,
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
println!("{total}");
|
||||
|
||||
// Part 2
|
||||
println!("Part two: ");
|
||||
|
||||
let mut ratios = 0;
|
||||
for part in symbols {
|
||||
if part.symbol != '*' { continue; }
|
||||
let adjacent = spans.iter()
|
||||
.filter(|span| span.is_adjacent(part.position))
|
||||
.collect::<Vec<_>>();
|
||||
println!("{adjacent:?}");
|
||||
if adjacent.len() == 2 {
|
||||
println!("{:?}", part.position);
|
||||
ratios += dbg!(adjacent[0].value) * dbg!(adjacent[1].value);
|
||||
}
|
||||
}
|
||||
|
||||
println!("{ratios}");
|
||||
|
||||
Ok(())
|
||||
}
|
||||
10
test_cases/day_3.txt
Normal file
10
test_cases/day_3.txt
Normal file
|
|
@ -0,0 +1,10 @@
|
|||
467..114..
|
||||
...*......
|
||||
..35..633.
|
||||
......#...
|
||||
617*......
|
||||
.....+.58.
|
||||
..592.....
|
||||
......755.
|
||||
...$.*....
|
||||
.664.598..
|
||||
Loading…
Reference in a new issue