diff options
| author | Jesse Luehrs <doy@tozt.net> | 2023-12-03 00:47:43 -0500 |
|---|---|---|
| committer | Jesse Luehrs <doy@tozt.net> | 2023-12-03 00:47:43 -0500 |
| commit | 6c05e1f8daffabd71be5aac7c0bc9d7586b5c359 (patch) | |
| tree | dd619560f7a8aad91e30ca068df1e7b6b6d59ccf | |
| parent | f6a8a5ef3ecb69962ca2dbd09327639bd959dc8f (diff) | |
| download | advent-of-code-6c05e1f8daffabd71be5aac7c0bc9d7586b5c359.tar.gz advent-of-code-6c05e1f8daffabd71be5aac7c0bc9d7586b5c359.zip | |
day 3
| -rw-r--r-- | benches/2023.rs | 5 | ||||
| -rw-r--r-- | data/2023/3.txt | 140 | ||||
| -rw-r--r-- | src/bin/2023/day3.rs | 114 | ||||
| -rw-r--r-- | src/bin/2023/main.rs | 2 |
4 files changed, 261 insertions, 0 deletions
diff --git a/benches/2023.rs b/benches/2023.rs index 9f34794..29e15b6 100644 --- a/benches/2023.rs +++ b/benches/2023.rs @@ -5,10 +5,13 @@ mod helpers; mod day1; #[path = "../src/bin/2023/day2.rs"] mod day2; +#[path = "../src/bin/2023/day3.rs"] +mod day3; // NEXT MOD day!(2023, 1, day1); day!(2023, 2, day2); +day!(2023, 3, day3); // NEXT DAY fn bench_2023(c: &mut criterion::Criterion) { @@ -16,6 +19,7 @@ fn bench_2023(c: &mut criterion::Criterion) { b.iter(|| { day_combined!(2023, 1, day1); day_combined!(2023, 2, day2); + day_combined!(2023, 3, day3); // NEXT DAY COMBINED }) }); @@ -26,5 +30,6 @@ criterion::criterion_main!( benches_2023, bench_2023day1, bench_2023day2, + bench_2023day3, // NEXT GROUP ); diff --git a/data/2023/3.txt b/data/2023/3.txt new file mode 100644 index 0000000..e401c84 --- /dev/null +++ b/data/2023/3.txt @@ -0,0 +1,140 @@ +.........232.633.......................803..........................361................192............539.................973.221...340..... +.............*..............#.....256.#.........329....................*313............*.......766.......*..........472..-...........+..249. +670-..@.......181......814..865.........968......@.......605....128.............%......798.638...+....776...........*......%...........*.... +.......563........741....*..........&.....-...............*........*....815*....921...........*..............428.219..993.584...990.431..... +.........................466.971..815...&....634.197.%...887....114.........521.........&..796.......-.......+..........*......*............ +................713.546......*........941......*..*..837............903...............910.........988....61..........&..946..240......697... +........563........*....707-..895...........223..160......618..........*..................................&...61...603............495.=..... +..........$............................+633............................697.910.....@70..................................497......*.......... +...568..........+832......@.......551............#863...324*......................................837......701..740.................72...... +.....*.98..................245....#.........&...............145................#...832.......580.....*.......$../.....432..........*........ +..315....../......4.......................174......*971............76.......472..............*.......66...................260.....348....... +.......179.908.....%.......-....-108.726........654......422.................................501.644....279.....&.....528*.................. +........*.................913..........*.639*............-...........-131..5.....%......................*.......228.........900..148........ +......665..........220.......................561...........................*...237..576.381.........../.......................*............. +771................*.................416.................996.799........441..........*..=..........355...........570.481*422..798........... +....+924..#462..420..659@.404.........#...................*..*......*..........233.........................955...%.......................... +..........................................265.........86..43..1.398..624......*........896.53.855............/........301...............#... +...............688.................#..614*..............*........#............103.486...@....*....+........................672.725....508... +...........993...=.....906.124....92.............208@.626...298.....................*..........810........428*461..619........*............. +590*......*........636..*..*...........683..................@.....*128...524...../...507..@636........................=...........991.....52 +....61.993............*....627...=796..*.......................841..........#....105...........313......=...................555...#......... +715........625..963.194.................505..841......&442.............108*....................=.........58.......450..........*............ +............*....*..........343.138*560.......-............................561..........*53.................$........#.327......766....234.. +.....-...276....370..........%............913..................16.825.............%..111.....561..........446............................... +.....372...............................@............@..........././....*8.......136......758....&..349.................666.....*............ +.........340..639............214......364..31&.......440..644$......577....................&......*.....................#...382............. +........*.......................*..........................................175..........84........931..692.......................*.......... +.......860..........@..........400............235.....797.................*...............*...863................683/....778..367.79........ +..................192.....%...........897..............*.....320*634......................32..............556...........................$... +...........783...........475.............*.781......875..891...........867......322...............8..........*...938..318.462*........&..620 +....#.......*....$293.................330.....*............*...........*.....26*.......668.205.......32.%....975.....#........750...25...... +..521......388.........116.....33.............2...........519..717..859..............&....*....*881.*...109...............828............... +................................*...927.........................*.....................240....66.....27.......482.227*...................#968 +...$479...........91*...%.......598........102../.........615.....184..@......456.385....................+.....*.....476...13+...391........ +........................526..................+...90..............*....500.......$....*.....14......*......206.57............................ +.........53&...134*...........%784....=................775.692.88..........873......115..9.*....937.242..................729...342......344. +....*568.....#.....................-..140...=.............*..................*..............521................185......*......*............ +.462..........331...$......337...90........829.....$.........262=.....376..787.........*352...................*..........227..413....518.... +......&............796.698...@.................346..277....=.........*............%.918......902.....327.....120....320...............*..... +....902.....488..%...............................*........150.688...822.........721...........*......................*.............*3.445... +...........*....132...........71..880.........770.....150..................................674.............924........746.......403......... +.....929...771..................*..................$.....*..110....63..................847.............423...-....651....................... +................./......729...927..867..........577...763...*........*..55.....320*......../..674.962..............*.............421........ +.../...........707.........*...........222.................301....702....*.........943...431..+....#....59.600..756...593..352..=......*579. +.965...607............669.406.704........*..............#......*......720.................................*..........@.......@.............. +...........333.........*......*..........839.............449...210.........219........=84...842............................................. +.......582...-..........350.831..394.835.....184...........................*.....676........*............755.........22..................... +..710.....&............................#........+.....................86.889..............86..625..........*...........*......195.547....... +......549....945.601.........*.......+......975..............285.................743.........*............433..........619..........*....675 +.........+.............204..161.......493..*.......896...576..*........328...............902.819....362..........373..............854..-.... 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+....*...$./................727..................787..=.....*.....*......593....*.....+...........736...191.609.774.................*........ +.....62.......325*.....372....*994../...........-..........513.853.907.........43...........*........................511-.850.......49..696. +..........856.....651....*.........314...213..........+.............*..............%.....718.70...................*..........*.........=.... +....659*...*..........453..............................123.........921.......11=..32...............312....795..467.689.......760............ +............997................545.597.................................@.................$........*.........*...........................808. +..565...............115.522.....*...........-..179...606.269.........885...733*.........857.857.252....510.842...518.......678........$..... +....%..............*.....*.......420.426..92.....*......*......................447..........*............*...........995.....*.761.158...... 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+........717.................#.344........................*...........970.................*.......#...953....546........162.............637.. +........*.................37...*.......740......331......564.....................556.................*.....*....843.......*................. +..195............2*...........937......*.......-.......*..........=..255.349.....=.......*837.......342....411.*.......537...337.....791.... +........=..........641...............424.............24..........261....*.............667.....551&.............324..........%..........*.... +..330...841./465.......486......................&.......*996.........#..................................227...........&.........33.681..354. +....@..................$........................455..........304.....542.#....64..624........./........*........716...245...166...*......... +..........331*738...............249.................126..833...*..........913.................690....943..284..................*........938. 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+.286.....*...775../.......274/....74...774.986.................96.469.......................335..526..................344..31.942.31...846.. +..........72.......582...................*..............#......*..........380&........570....../....*.........$....*........*............... +......................................201....*648......838..253....101*.@................/..........606.....744..792.........396..-990..+609 +.938...............*..896..125*...........842...........................485...510............801.....................329.983................ +...*............963....*.......761..............................................*...927.........*...................*.....*........45....... +....981................675.........676.............156.............30...........998............697......14..366....960...874..497........278 diff --git a/src/bin/2023/day3.rs b/src/bin/2023/day3.rs new file mode 100644 index 0000000..2f7dcb0 --- /dev/null +++ b/src/bin/2023/day3.rs @@ -0,0 +1,114 @@ +#![allow(dead_code)] +#![allow(unused_variables)] + +use advent_of_code::prelude::*; + +pub fn parse(fh: File) -> Result<Grid<u8>> { + Ok(parse::grid(parse::raw_lines(fh), |c, _, _| c)) +} + +pub fn part1(schematic: Grid<u8>) -> Result<i64> { + let mut numbers = vec![]; + for row in schematic.each_row() { + let mut current_number = None; + for col in schematic.each_col() { + let c = schematic[row][col]; + if c.is_ascii_digit() { + match current_number { + Some(n) => { + current_number = Some(n * 10 + i64::from(c - b'0')) + } + None => current_number = Some(i64::from(c - b'0')), + } + } else if let Some(n) = current_number.take() { + numbers.push((n, row, col)); + } + } + if let Some(n) = current_number.take() { + numbers.push((n, row, schematic.cols())); + } + } + + let mut total = 0; + 'number: for (n, row, col) in numbers { + let len = n.ilog10() + 1; + for offset in 0..=n.ilog10() { + let col = Col(col.0 - usize::try_from(offset).unwrap() - 1); + for (row, col) in schematic.adjacent(row, col, true) { + let c = schematic[row][col]; + if !c.is_ascii_digit() && c != b'.' { + total += n; + continue 'number; + } + } + } + } + + Ok(total) +} + +pub fn part2(schematic: Grid<u8>) -> Result<i64> { + let mut numbers = vec![]; + for row in schematic.each_row() { + let mut current_number = None; + for col in schematic.each_col() { + let c = schematic[row][col]; + if c.is_ascii_digit() { + match current_number { + Some(n) => { + current_number = Some(n * 10 + i64::from(c - b'0')) + } + None => current_number = Some(i64::from(c - b'0')), + } + } else if let Some(n) = current_number.take() { + numbers.push((n, row, col)); + } + } + if let Some(n) = current_number.take() { + numbers.push((n, row, schematic.cols())); + } + } + + let mut gears: HashMap<_, HashSet<_>> = HashMap::new(); + for (n, nrow, ncol) in numbers { + let len = n.ilog10() + 1; + for offset in 0..=n.ilog10() { + for (grow, gcol) in schematic.adjacent( + nrow, + Col(ncol.0 - usize::try_from(offset).unwrap() - 1), + true, + ) { + let c = schematic[grow][gcol]; + if c == b'*' { + gears + .entry((grow, gcol)) + .or_default() + .insert((n, nrow, ncol)); + } + } + } + } + + Ok(gears + .values() + .filter_map(|s| { + if s.len() == 2 { + Some(s.iter().map(|(n, _, _)| n).product::<i64>()) + } else { + None + } + }) + .sum()) +} + +#[test] +fn test() { + assert_eq!( + part1(parse(parse::data(2023, 3).unwrap()).unwrap()).unwrap(), + 540212 + ); + assert_eq!( + part2(parse(parse::data(2023, 3).unwrap()).unwrap()).unwrap(), + 87605697 + ); +} diff --git a/src/bin/2023/main.rs b/src/bin/2023/main.rs index cb9aa54..652bf26 100644 --- a/src/bin/2023/main.rs +++ b/src/bin/2023/main.rs @@ -13,6 +13,7 @@ use advent_of_code::prelude::*; mod day1; mod day2; +mod day3; // NEXT MOD #[paw::main] @@ -21,6 +22,7 @@ fn main(opt: Opt) -> Result<()> { match opt.day { 1 => advent_of_code::day!(2023, opt.day, opt.puzzle, day1), 2 => advent_of_code::day!(2023, opt.day, opt.puzzle, day2), + 3 => advent_of_code::day!(2023, opt.day, opt.puzzle, day3), // NEXT PART _ => panic!("unknown day {}", opt.day), } |