diff --git a/inputs/day3.txt b/inputs/day3.txt new file mode 100644 index 0000000..28e848f --- /dev/null +++ b/inputs/day3.txt @@ -0,0 +1,140 @@ +..975..95..................717..........................................747................................................622.............. +................/47...........@....701...610.........252.660*.............*..236.....323..........108........653............................ +.......69............313..............$...$...*....@.........640........81.....*................................*332..92.................... +........................*...210.............767...912...367.......505.......817..................*.........478.........=....223.....568..... +..76...968............108...@.....556.....................=..........*...............412..313...575......../...........................*107. +............773/..891............*....................744.....805...14................../..../................320&.567..#................... +.962..708............&........399....146.....385.................*..........825.......................................-..655....485...-..... +...*.........+..........................*76...+..................242....997..*......185..........207.390..870...883............*.......337.. +....929...299....................*.................249........-...........*.373.....*.............*.....*.*....*.............549............ +................196.745.996...364..............409...-.926.....273.....580.........31...........545..547...862......810..................... +................*.......*..............900+....*..........*........586.........936...................................*.........673.......... +.../..........864.683.215....*......%.........702..166..46..........&....341..........694..496.......528.%...........839...105..*...887..... +....506...617.....*........51.807....942..424...............................*..........@..+............@.84...................*......=...... +...........@....594.........................*..........*675...........345..52...$..................-..............899.........804.$......... +.362*366.................487+.48&.......600..180....845........................535...18...........397.#908....432*........229......346...... +.................*................835....................578......*502...............*..416.............................................391. +....610&...514...501......./........*....*71.........../.......674......925...............*.869.....966........393................/.687.*... +............*...............786...248.104........92.633.....%..............*104...&466..138..@.........*.525...+......974......339..=...260. +....372/.889..............................55.406........134..250.=228..609...........................69...............*..................... +...........................................*........976...*...........=.......357...........................191.....150..................... +...-...........595.634.........*396......592..594......*......411.856...760....../..................201.....#...709................168...... +.936..236.........*....@....436.....100....../......35...../.....*........*....................917%............*.....................*..#63. +.......*..............542..........................*........689.........26....667.&...................738....831..$.............513.53...... +........10.....529........*250..........162.......390...........................*..70.............................701..........*............ +..355.........&........394......301@..........542..............................142..........%..............%..........*.....507............. +.....*.........................................*.....%..283.....*.........997&.......@670....402..........808......308.459.......712...152.. +..291......246.@....+986.....336/.......976...468.264...*....739.187.............................................................*.....*.... +........../....46...................186.$..............674............................227......-............975...............436.......492. +.491........................810.......*........................772*.........742........%....198.....*702.......*.596=....64.......=......... +...................706......=......415..................=.199......235......*...47........................72.607...................443...... +.214..............*.....771.............302...........230..+..............810.....*219.606........912.....................=................. +......277......320.............937.....*.....+....632...........&374..............................*....................898.....642%......... +.........#....................*.......716....229./.........................$................934...233...............98............../....... +.....*........-659..457.........964...................659....786....619.666........277...@.....*......930*460..618...........910..265....... +..845.877.343......................*537.../120.......*.......*.....*.................&...175..631.............=.................#........... +............*....................+................@...35.949..34.381......273...880......................451........326..................... +............876..880......827..733.......645.......38......*.........402.....+..........902....459.775........837.....*.185.......813....... +........578................/............*...............622..18.........*234..............+....%..........448.......935....#.............350 +..........*...468.....546................588....146=.........*..142.795..............*424................../.....................=.......... +........245............@...746.......362..................970......*..............593...............487.......+.............709..593........ +...990......&415..............*381......*.....................435.......214..908..................*....*.....351.....876.25....*............ +......*............293*.....%...........271.............135......*......=........540............177....604...........&.....-.46..........166 +...609.....................910.................@........$.......321..........141....+.45.....................750......................98.... +.......#....779........944.....653...........797...........788.................*......+....164.724....475&...+.............-.471......&..... +..794...487....&..81...........*...................@............666@.....*981.937.............*.....%..........888....+...81................ +.....*...........+......694.............748...104..859..............................675.434.......290.............*..352........353=..$..... +...619.977.........859..#....235....230*......*..............429........335....-.......*......631.......=.......27...................192.... +.......*............=...........&.........121..680.195.959......*417.....*..938.............../..........739..#..............194.750........ +....309...439.............14...............*..........*...............723.........163..748...........853.....885.........175*........487.... +.............*707..-626..........464.....382................356...........868#....*...*.....13......*............450............#.....*..... +........216......................*...619......$..270........*.....892............25.494.841*.....971.............*............157.+...119... +...#40...../............343..559.425.......536........718....739...#.......284...............726.....985..136...597.621.173.......203....... +................383............/......................*...................@....348............*.....*.......*........./...*...811.......*158 +...=..............$......@....................776.829.85...&........541.......*....*...&....700......341.995.....73......114....*....267.... +.700.203....591.*.....924..........$217.......@.....*.......590....*.........812.579....517.......................*.............730......... +......#......*...586.........312..................806............435...259...........................573........453.282*132.243............. +..........224.................#.......468@............-...%.............*..............453...................$.....................-........ +....................................................227.673....881......828..&.....632*...................589.....................284..-.... +.....680.........871....17+................117.................*.............506..................#...410...................616.........519. +........*..386................78*762.........@........28..557.655.......359........-............124..#......&..........843./................ +......724...*..584.....552............................*...&.................209..857...633-..............602...932......*........132&....... +..........41../.........*..........................#..427.............=370....*................................*...353...902...........529.. +.....................150.......868.......370....549.........779...................284...........431.....3.....889.............189..103.=.... +.......530..355..........442...*............*63............+.......852.....935.....*..............%.....*..................@....*.-......... +..........*...*...976.....*...500....@...........572...........940....*990..*....627.790.................460..904..601-..821..930....699.... +..........643.824.......248........358...4.........&..301.........&........538.........*.%436....565..........*......................../.... +.768..$.....................186..........*...178........*.......................*.&520..............%........782..........497.-......*...... +......762..828*...972......*..............3.*.......................@....../..836...............278..............666......*...927.413.185... +....&..........40.......86.122..........&....450....................1....202............42...51....*..............*.....215................. +.353.................94*.................995.....655.....520...828....*...........612..........&.119...........486...............713........ +.........................255........................*.......+.....-..463..........*........235........836....................668............ +...................................................286........338........=.393....398........*....199./............631..........*631........ +................64%....704...928.........470...125............*....708.15...*.............193.......*........641....*......687.............. +........$..............*...................&.....*..........582......*....652.@358..643..........125.....458........168....$.......$194..... +........293.........305......417...............117....................612............*......262.............*903............................ +.....$...................615*..........581.........335...139..505.419.............656.........+.......506................710.....956........ +776..110.....+............................-........#..........*....*...447......*......................*...*.....938.366*.......#....376.... +..........366............844....305..761......780......560........236........725.272.....450.............67.126.....................*....... +.................669$.......$.......=............*220./.....+665........495................*.@103....992....................&........600.... +.......*......................812/.........................................$............940...........+...................146...975......... +....410.650.282.....*...............696.833....957...............996...*......772.287...................921..935................%.....$..... +............*....413.921...713....................%.....769.........@.390.216..#.....@..........................=...........*.......46...... +.....798.136..............%....150.....236..............*......31...........*..........@.64..17......616..........901......344.............. +..............................-........*.....402......873.......*......692...592....390...*.............*277................................ +......539.....799.../.....272....%.@....694.#.............667...318.......=...............762.......71%.......-153......................531. +..........556*......573.......465...916...................*..........602.........................=.......145...........................*.... +........................451.............../....%.....625.401.........*........428-.....493......479.427....$.........60......951......281... +..947+....36....270....*............517....521..258.*............108..812.............*................*........................*372........ +...........*....*....957.823...290.....*.............415..........*...............908..730..........589......+.............................. +857.........843............*........794......................677..27........................121...........670.........548.837*....&.....664. +......175..........-.....=........................422.......*..................226-..344.......*...................2....%..........474...... +...................283..190..@...........458........*.162@.666.517....202...............*..@...545.%.........705.............*.............. +...............*............296.466.....#.........................*..*.....852..208...999.475......256..........=....642..188.386........... +............504.888..................52....416......394...349.....53.953...*......*...........@521.........213........*..................... +......225...............272*32........*.....*..........*...%..............728.........827.513..........287*.........924..388%.........&..... +..453...*..................................71.....*..437.......501...869.......928....%...#....................%225.............734@..157... +....*..400...........810=.300@...13.15.537.....997........./......*.....*.........+.........407.758...674............604....500............. +..970..........409...............*...*...*................159...788....338..............636*...../....#.......#895....*......./............. +..................................52.....872........+...........................-........................524.........297............314..... +...........=...469.....408.............&.........641......364%.780...526.........540.865....742............*..............549..505...*...... +........404.......*...-....58..%....577...............655......*.............613......*.............343..779./854............*....*...567... +...103............284......./...999....................=.....640.....284..............566.982..........$...........476...478.793..556....... +......*.....436........916.................941.............@.........&...........284.........*183.........857.953........................... +...............*.404=.....*910..703@...20......266......815.....201.....54.332...........................@......*...........95.............. +.............898........................*........*..........13.....*806...*.......280.........................905........63*................ +........&.........642..271.627..920.+....534...96..780......@....=...........246../......99........................................../...... +....$....518.......@......*......*..323..............-............477....*4...*...........*....979......810.................366....697...... +.....439........................364.........161..594.....647..................802.........234..............*17......125..82....*............ +................187....667....................*..#.......*.......*................604..................946.............*....414............. +....585...218.....*...*.............-....536.396........950...200......296*935...*..........#...382..........883......182.......326....*.... +.....+......-...557.349...........217............................./105..........527..387....394...*...........#..430*.....501.......393.190. +.......*474.............16....................675.....999..............362..............*..........576...................*.................. +....449.....+.296*468.....................607....*...........-..#.................619....177...............31...........194..198..187....... +.........156......................330.......+..332...631...936...477................*...........658..........%..845..........*.............. +....*262.........$......362......*.....429=..............................*324....296...........+.......161.....*....57.....309.............. +.403............492..97.@.....695..696......$.840..&.................21.....................@.........*.......178...+....$.............364.. +......178..692*.....%.....82..........=...176.......456.....517........+...238.704.......682......266.................&..222..........*..... +......*........993........*....931*...........445..............*.................=...........@...*.......448.......251................222... +.......824............467..232.......664..299*.......322*512..850..............@..........585....259........$..................&............ +...458.....572.................379....*........123.....................-........298..................-................336...908....*........ +....&......*....&..732...701/....*....440.....$...........739..636.....65..../.......%151.............823.455............&..........119..... +........550....391..%.............259....................#....*............834............232.179............*.........4...795.784.......... +.............%...............729...............568.............936...............952........*..*..............726..........*.........-...... +...627.....87....@...........-...........6.....%...106.......................458*.....281..811..282..500..............=....833....214..780.. +..............320................665..............*........584.........................*............................343...............*..... +..................997....84.590.....*795.90*487.842..%431....*.......233..692....259....391.113*........*338............./..391............. +.....62.....#689.*.........*.................................444.......*...*......*.............445..861...........498/.857..*.....505*..... +......*...........436.869.....634@..663...599..901*678.100..........666....301..493.986....174.............838*492..........454........313.. +.....362.....983....../................+..*.............=.............................*....*.......259.............+....464.........27...... +...%........................580....68.....45.........................................21..768...267....*.+....661..879..@....&......$........ +.643....545......./435.....*.........+.............................823....919.......................20..102.*..............267.690.....55... +.........*...............557....247.......653....584.5*....430....*........../...529+...........856..........305.254..212.............*..... +........945...528................/...775..+............204...-.537....$..528................276*...................%....*....863......612... +....572.......*.........614.........+................................810...............842........438.....26...&.....%.........*............ +.......*....201.@......*....671..$........................../.............................*...832*.......*....214.899..........795.421+..... +994..797.........684.390....*....452../..................989..728............685....23+.856...........498.............443................... +.....................................424.......%...............@.......228.....+..............+.......................$..................... +.....2...812.517.........602*967.........262....953...*.....*....67...*...........+......1.431.....721.....402%..&.......*.....504.......... +.............*....%..................963*...........96...287.255.*...548.........534....*.............*..........896..531.789.=.......855... +...........579....595...........8................................781...............................547...................................... diff --git a/src/bin/day3.rs b/src/bin/day3.rs new file mode 100644 index 0000000..c0bcdae --- /dev/null +++ b/src/bin/day3.rs @@ -0,0 +1,86 @@ +#![forbid(elided_lifetimes_in_paths, unsafe_code)] + +use aoc23::read; +use chumsky::{prelude::*, text::int}; +use std::collections::HashMap; + +enum Entity { + Void, + Symbol(char), + Number { num: usize, len: usize } +} + +impl Entity { + fn len(&self) -> usize { + match self { + Self::Void | Self::Symbol(_) => 1, + Self::Number { len, .. } => *len + } + } + + fn parser() -> impl Parser> { + choice(( + just('.').map(|_| Self::Void), + int(10).map(|num: String| Self::Number { + num: num.parse().unwrap(), + len: num.len() + }), + none_of(['\n']).map(Self::Symbol) + )) + } +} + +struct Line { + entities: HashMap +} + +impl Line { + fn parser() -> impl Parser> { + Entity::parser().repeated().map(|line| { + let mut col = 0; + let mut entities = HashMap::new(); + for ent in line { + let len = ent.len(); + entities.insert(col, ent); + col += len; + } + Line { entities } + }) + } +} + +fn parser() -> impl Parser, Error = Simple> { + Line::parser() + .then_ignore(just("\n")) + .repeated() + .then_ignore(end()) +} + +fn main() -> anyhow::Result<()> { + let grid = read("inputs/day3.txt", parser())?; + + let mut sum = 0; + for (i, line) in grid.iter().enumerate() { + 'entities: for (col, ent) in &line.entities { + let Entity::Number { num, len } = ent else { + continue; + }; + + // see if adjacent + for search_row in i.saturating_sub(1) ..= i + 1 { + let Some(row) = grid.get(search_row) else { + continue; + }; + for search_col in col.saturating_sub(1) ..= col + len { + if let Some(Entity::Symbol(_)) = row.entities.get(&search_col) { + sum += num; + continue 'entities; + } + } + } + } + } + println!("{sum}"); + + Ok(()) +} diff --git a/src/lib.rs b/src/lib.rs index f1d53fb..ee9fb00 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -70,3 +70,13 @@ where anyhow!("Failed to parse input") }) } + +pub fn read_from_str(from: &str, parser: C) -> anyhow::Result +where + C: Parser> +{ + parser.parse(from).map_err(|errors| { + report_err(from, "", errors); + anyhow!("Failed to parse input") + }) +}