summary refs log tree commit diff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--15/Cargo.toml11
-rw-r--r--15/input100
-rw-r--r--15/src/main.rs218
-rw-r--r--15/src/main.rs.bak181
-rw-r--r--15/tests/main.rs17
-rw-r--r--Cargo.lock8
-rw-r--r--Cargo.toml1
7 files changed, 536 insertions, 0 deletions
diff --git a/15/Cargo.toml b/15/Cargo.toml
new file mode 100644
index 0000000..dcc368c
--- /dev/null
+++ b/15/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "advent_15"
+version = "0.1.0"
+authors = ["Irene Knapp <ireneista@gmail.com>"]
+edition = "2018"
+
+[dependencies]
+advent_lib = { path = "../lib" }
+
+[dev-dependencies]
+assert_cmd = "0.10"
diff --git a/15/input b/15/input
new file mode 100644
index 0000000..1ec5758
--- /dev/null
+++ b/15/input
@@ -0,0 +1,100 @@
+8656175343119439947311919179279377257689197682985752287249881788527977345924133329967132199899199876
+4281288396984115627338957853913949146812568775798196289991176529889498798259196976277683981565984526
+8169838335918963371547591999342191683995972519179929683978126291855319511168245582651697938949414963
+9911589184911198759466719191189995157885898771177913669999436998997781742478168921196176418888127932
+2332856729917591158935782911513226531793881992469468248251991718456991551657621249229316797949388969
+6488738222981127824819626661531168733698299313631126969162927725778914183239351484699921454131481322
+3456499223985116399353928681116846939429849384129296119943791119497551946593566977823982927391143399
+9297612841849646148511299569971197927971682598351883892842936977227795411959211782251399118676896328
+1685688918999598249622886442487951289969917848948815999749154287969297396481891239821819247914959943
+2855192597719945162116189119381795158862162959133647579913886639586438893695967226719685616432291318
+3893139873964939791913261811173979825213968972939996181992593113695976322782892995939891783998623789
+5964671772545917912328949994999514157618987654288269789931394913375316999489275494179994919117119365
+3216339828898396212733674969295762442389789119366989996931919596282992864471192938639162947919972647
+7879826444123912118829914949989194219763533694839431198212319893181151696157671388992581982743988967
+7876122492176935838133394839673532581399474449569117478121989273123412313151952891988698552384251637
+8786999269197821985731819155537259938991261919979365751539876866146174376911518943778479997131942722
+7239919942299391891898171771589178983916281118889294494829292752139999754571391999826947791975394972
+2727617215141959982544247383138498917281833932371546394891963994434638187617528821379728933335772342
+6712949984729176138535147942577311588399869767114795759883948915177671474313191789814718292236422124
+8689792116597916131779139899373471282726812338914773516383771158691551851991689929199689197212298649
+6228175894997691471313338136819712699979449476188196729899628851391971728199959981585798691881191415
+9491157288112631922166642933446197292729817888649185515198768537925149995158353829229269894798938589
+5199389142294542461535132814487861987422485947698739199748986652229272998164982399192268248929567161
+6881119581991538187539159493621999896486112182779617795198955921614753699796171837819179999654231813
+6996595113784151975521879415898217119639999975184518599369743127684295298268259495226623211591871888
+1779949977648145993713949919359399998812143513534984334127763318649997689919849157137418761137512977
+9223292971993981422528813498119387921238194638215641911218326517839287886478991147999899894724396962
+7451983891767995938972123465939918261682281929689989464297789895588752221375859586787938391672994381
+1579954176878141996516584483611183926131694919877929897576151469657864935819598781814826881644187861
+8934595321937914584995177237653199951582515953621782173159453287575529819242531191989113518599339361
+3214791137819868237121897913928328682928239268681975567994149694512799167598489194267554981611157817
+3161289322443822496458312797912957538349962328948955764669152944278622928929944477635195993465821714
+3769985892295265479971729196428585411214871889139731131516448815999122871374996159138497416978598848
+4926877381218811127939655759733739111889455359949289979523168797571871445191441719179859376969393872
+7159871151274214979637977982939997337182139971896511115912187982698278842961545125121242636339621282
+8423118867997391616931374681582965659184916625321536161483641999294114251928796446618889979683993218
+6824788915976897879897933391998341399228914119912289149511515799142181679965255395897688149876629889
+4794395837416911945432167619882718499181629123717219977896911277339851349162195299228963994667691947
+1465122112768881153591399679274839985297692314947884169719151181986711822112796246416415955915718319
+7114797833579933611249299912348294873921288555119486979959982462111791467394161781467316779796883775
+9767795467854144194712742294766968549329117618283754959873952489784997597669593796889571883816748771
+1759974879458746414925558868197241214751687661841649999221178613679929261984417289292556869111324941
+9557955429999672993612951916598187741611893112948813816999484953994151249931191942493691497559992158
+1469791219499218437828194894539893191199115998162227659757698173867329816328599398544492677817272998
+6696472832532492295279572315976884291727999732161858916985514872395367168971969865959582923387918951
+9722652752119479169481198119314728131429449798379179119171791999189878174319864498112912224658495939
+9581794449119116165418178711351481129242636919987948291451161695541253977174231393582734959682898495
+4757727865924728111221629983989222587789999361791192917315287219922119718827676188689966872358484669
+1982319969915242121935864989286462118395187369193933592791414764965279817872197863615512262358899223
+1811379712999278717898361849316989959114612857179582117839285399618929182259624916911439331479239488
+1377519658968884779897799292198595917148591218821239614925192183128211371959295299959221257811239131
+2627929612263297913663198357736594275199769318118546371628241929618769991214845296132728799271417791
+7576972138942696587693261199467749912936563131454674591315468112333812659454789393699615918167338715
+1778985995949591574849625759667137792111923771976687288498928179271746938986792658149697999719931492
+1497174992519427759719169714342998311421419197412331399469329847692794191181111339933357161599799597
+7158163932199423259572847121198873491117119999919996985599149129919588579223518511588378639685891315
+6219361855573892912131718991998196749251949481814844299182119621344738991784149679694476483378729929
+1398599388779918861183115593522489331874978727922373471991219247115944295163699192776967648639268659
+8246143812623927544154898631717811662213981175534335932638718171969421398421692892399791789186618487
+4457134139841167885881924949364884427839314973843366971997383189398399657998961185159781215111619878
+2889934549617841969369167119338852267887359654637229634658717722728239549585928482358431813296859898
+9968328746979669249145999585143117898196251944175462877716129989773292878848966999379983436559934934
+6493994193996595991299891992438695916166928199197254269991979292986895799985938128881229638182945947
+7266928918675112795879219714929968471352931229592623394713393869269941181318972192169271548316892574
+2174196776119149368951321419512925818641848291921584561885586189445194773817792112569311611884895234
+5617593683181229369984148191819568774125471789395181874847932736429929334265516997661987796259692831
+7882228973393795938729341656949619511272988446634311621871394678132831899299832311614174939261965429
+1131881592984545192978449637151892697525357924197922698921549791127287595929496515499876251183628176
+9922954913893559597663824459627321943979599969474976998899879429185892995511392872381956558981867119
+5166385448694129439797196837181355547743133114829285275149516986685925813416161972979872853196155916
+3292899922794159291851551956738911971988929383861879921354871787791695284999126375594873179426338749
+3971894752927483651131869717199971871964396958991799413921821198121691265888799954912311963139425236
+5778565318498395151591219315499879273943817921588123199611531989674238272218198865913747444419629892
+1148956123134785152496887782841669964225944272953163717879528194631986997718971481186872943816456591
+5982998155291779554662769986899318991622943125199743569463317913185991442772122148595119965486877247
+1592622221626611159996955945922614981222438358385913259412688295754161193293194979914999974739594393
+1735995389872189896282749844299933869588931688619645726996959149185997128397635694766944945458588326
+8969839951998899979864239155832982419271118982882915197745124695321464198748765361499779978719441246
+6625484228731161195646227911299498172947526327866775111148173468799729895761595437743769876911891521
+6742199381937628999297557371399872217983581247138899399239252389649491949578491998528132446741686888
+9212328164223895178547771855976415127193137191217188318191949238429129518281919843229126971963111111
+8589368771155989697277997492471969978917117589192916193887975787949771588121551699971132275182798898
+1321997349438946615383211392181979153964221243634922639112684529286794272849757186396714797832698913
+5499455959999492339698359789213323519479768626457859213487938838995348379392231623595879353861382977
+4612129999347379911982695394862437936254989311441326295994617191963497895691479282499959828989987571
+3953949985681978999897341375236798381973326952579319464522624134872231113676167279146985521828793431
+2547232255918288952326674861524529119719429148626615319818611241832868529862499874951986568635799957
+2181959929952711246913363617991144311613441799129546223661433628933579819732979148127949974997119951
+1369158892917379123998253242599392893199998853969933983592129813969821127281951849151627687114757833
+9629699176294886577773394197932998769278865351155516385519239971147785457838922269188195227329168368
+1788912961677399663173822433232514884848179868666798987368382881226468481869127998236137881926332779
+4811241997249159619241887142461943467819366815858371379792287198271563986876852729186927761281942192
+2121993996798639492562961751217922319969898368461919218459919713413366292171628639922554153774327219
+3489591127775295131639799492971117993637992434115331278511281997587996291111198123428588991837368589
+1283798883941983912985615991541417994114453747887836936186431822993881123911799962749981389292178586
+8392631553657936578372199916912973193995216848776811924799769959318889717919172521769363698292447429
+9587697134368994212916856845984875416273418561198913859115983139967143891991617853289936814265113512
+9111571922348271733199797953979536915998195916688317991255916216419817129423728913622269119972958686
+9959599568987335314713638999897919449512991684446347789183915679567141547281548619496728636288445972
+8391247911139217869276338998734496391173478717461631572924754792241695917352991662734191814376765142
diff --git a/15/src/main.rs b/15/src/main.rs
new file mode 100644
index 0000000..5fba0e8
--- /dev/null
+++ b/15/src/main.rs
@@ -0,0 +1,218 @@
+use advent_lib::prelude::*;
+
+use std::collections::BinaryHeap;
+use std::cmp::Reverse;
+
+
+#[derive(Eq)]
+struct Exploration {
+  x: usize,
+  y: usize,
+  risk_so_far: i64,
+}
+
+impl Ord for Exploration {
+  fn cmp(&self, other: &Self) -> std::cmp::Ordering {
+    Reverse(&self.risk_so_far).cmp(&Reverse(&other.risk_so_far))
+  }
+}
+
+impl PartialOrd for Exploration {
+  fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
+    Some(Reverse(&self.risk_so_far).cmp(&Reverse(&other.risk_so_far)))
+  }
+}
+
+impl PartialEq for Exploration {
+  fn eq(&self, other: &Self) -> bool {
+    self.risk_so_far == other.risk_so_far
+  }
+}
+
+
+fn main() -> Result<()> {
+  let mut args = std::env::args();
+  if args.len() != 2 {
+    eprintln!("Usage: advent input");
+  }
+  let _ = args.next();
+  let filename = args.next().unwrap();
+
+  let input = advent_lib::read_lines_file(&filename)?;
+
+  let mut value_grid = Vec::new();
+  let mut risk_grid: Vec<Vec<Option<i64>>> = Vec::new();
+  for line in &input{
+    let mut value_row = Vec::new();
+    let mut risk_row = Vec::new();
+    for c in line.chars() {
+      let value = c.to_digit(10).unwrap() as i64;
+      value_row.push(value);
+      risk_row.push(None);
+    }
+    value_grid.push(value_row);
+    risk_grid.push(risk_row);
+  }
+
+  let height = value_grid.len();
+  let width = value_grid[0].len();
+
+  risk_grid[0][0] = Some(0);
+  find_path(0, 0, &value_grid, &mut risk_grid, false);
+  let risk = risk_grid[height - 1][width - 1].unwrap();
+  println!("{}", risk);
+
+  let mut big_risk_grid = Vec::new();
+  for _ in 0 .. height * 5 {
+    let mut big_risk_grid_row = Vec::new();
+    for _ in 0 .. width * 5 {
+      big_risk_grid_row.push(None);
+    }
+    big_risk_grid.push(big_risk_grid_row);
+  }
+  big_risk_grid[0][0] = Some(0);
+  find_path(0, 0, &value_grid, &mut big_risk_grid, true);
+  let big_risk = big_risk_grid[height * 5 - 1][width * 5 - 1].unwrap();
+  println!("{}", big_risk);
+
+  Ok(())
+}
+
+
+#[allow(dead_code)]
+fn debug_risk_grid(risk_grid: &Vec<Vec<Option<i64>>>) {
+  for row in risk_grid {
+    for cell in row {
+      match cell {
+        None => { print!(" ."); }
+        Some(n) => { print!(" {}", n); }
+      }
+    }
+    println!("");
+  }
+  println!("");
+}
+
+
+fn find_path(x: usize, y: usize, value_grid: &Vec<Vec<i64>>,
+    risk_grid: &mut Vec<Vec<Option<i64>>>, repeat: bool)
+{
+  let mut height = value_grid.len();
+  let mut width = value_grid[0].len();
+  if repeat {
+    width *= 5;
+    height *= 5;
+  }
+
+  let mut exploration_queue = BinaryHeap::new();
+  exploration_queue.push(Exploration { x, y, risk_so_far: 0 });
+
+  loop {
+    let Exploration { x, y, risk_so_far: _ } = match exploration_queue.pop() {
+      None => { return; }
+      Some(value) => { value }
+    };
+    let risk_so_far = risk_grid[y][x].unwrap();
+
+    if x > 0 {
+      let value_left = get_value(x - 1, y, value_grid);
+      let new_risk_left = risk_so_far + value_left;
+
+      let risk_left = risk_grid[y][x-1];
+      let should_move = match risk_left {
+        None => true,
+        Some(prior_best_risk) => {
+          new_risk_left < prior_best_risk
+        }
+      };
+      if should_move {
+        risk_grid[y][x-1] = Some(new_risk_left);
+
+        exploration_queue.push(Exploration {
+          x: x - 1,
+          y,
+          risk_so_far: new_risk_left
+        });
+      }
+    }
+
+    if y > 0 {
+      let value_up = get_value(x, y - 1, value_grid);
+      let new_risk_up = risk_so_far + value_up;
+
+      let risk_up = risk_grid[y-1][x];
+      let should_move = match risk_up {
+        None => true,
+        Some(prior_best_risk) => {
+          new_risk_up < prior_best_risk
+        }
+      };
+      if should_move {
+        risk_grid[y-1][x] = Some(new_risk_up);
+
+        exploration_queue.push(Exploration {
+          x,
+          y: y - 1,
+          risk_so_far: new_risk_up
+        });
+      }
+    }
+
+    if x + 1 < width {
+      let value_right = get_value(x + 1, y, value_grid);
+      let new_risk_right = risk_so_far + value_right;
+
+      let risk_right = risk_grid[y][x+1];
+      let should_move = match risk_right {
+        None => true,
+        Some(prior_best_risk) => {
+          new_risk_right < prior_best_risk
+        }
+      };
+      if should_move {
+        risk_grid[y][x+1] = Some(new_risk_right);
+
+        exploration_queue.push(Exploration {
+          x: x + 1,
+          y,
+          risk_so_far: new_risk_right
+        });
+      }
+    }
+
+    if y + 1 < height {
+      let value_down = get_value(x, y + 1, value_grid);
+      let new_risk_down = risk_so_far + value_down;
+
+      let risk_down = risk_grid[y+1][x];
+      let should_move = match risk_down {
+        None => true,
+        Some(prior_best_risk) => {
+          new_risk_down < prior_best_risk
+        }
+      };
+      if should_move {
+        risk_grid[y+1][x] = Some(new_risk_down);
+
+        exploration_queue.push(Exploration {
+          x,
+          y: y + 1,
+          risk_so_far: new_risk_down
+        });
+      }
+    }
+  }
+}
+
+
+fn get_value(x: usize, y: usize, value_grid: &Vec<Vec<i64>>) -> i64 {
+  let height = value_grid.len();
+  let width = value_grid[0].len();
+
+  let tile_x = x / width;
+  let tile_y = y / height;
+  let increment: i64 = (tile_x + tile_y) as i64;
+  let raw_value = value_grid[y % height][x % width];
+  (raw_value + increment - 1) % 9 + 1
+}
+
diff --git a/15/src/main.rs.bak b/15/src/main.rs.bak
new file mode 100644
index 0000000..33f76e3
--- /dev/null
+++ b/15/src/main.rs.bak
@@ -0,0 +1,181 @@
+use advent_lib::prelude::*;
+
+
+fn main() -> Result<()> {
+  let mut args = std::env::args();
+  if args.len() != 2 {
+    eprintln!("Usage: advent input");
+  }
+  let _ = args.next();
+  let filename = args.next().unwrap();
+
+  let input = advent_lib::read_lines_file(&filename)?;
+
+  let mut value_grid = Vec::new();
+  let mut risk_grid: Vec<Vec<Option<i64>>> = Vec::new();
+  for line in &input{
+    let mut value_row = Vec::new();
+    let mut risk_row = Vec::new();
+    for c in line.chars() {
+      let value = c.to_digit(10).unwrap() as i64;
+      value_row.push(value);
+      risk_row.push(None);
+    }
+    value_grid.push(value_row);
+    risk_grid.push(risk_row);
+  }
+
+  let height = value_grid.len();
+  let width = value_grid[0].len();
+
+  /*
+  risk_grid[0][0] = Some(0);
+  find_path(0, 0, &value_grid, &mut risk_grid, false);
+  let risk = risk_grid[height - 1][width - 1].unwrap();
+  println!("{}", risk);
+  */
+
+  let mut big_risk_grid = Vec::new();
+  for _ in 0 .. height * 5 {
+    let mut big_risk_grid_row = Vec::new();
+    for _ in 0 .. width * 5 {
+      big_risk_grid_row.push(None);
+    }
+    big_risk_grid.push(big_risk_grid_row);
+  }
+  big_risk_grid[0][0] = Some(0);
+  find_path(0, 0, &value_grid, &mut big_risk_grid, true);
+  let big_risk = big_risk_grid[height * 5 - 1][width * 5 - 1].unwrap();
+  println!("{}", big_risk);
+
+  Ok(())
+}
+
+
+#[allow(dead_code)]
+fn debug_risk_grid(risk_grid: &Vec<Vec<Option<i64>>>) {
+  for row in risk_grid {
+    for cell in row {
+      match cell {
+        None => { print!(" ."); }
+        Some(n) => { print!(" {}", n); }
+      }
+    }
+    println!("");
+  }
+  println!("");
+}
+
+
+fn find_path(x: usize, y: usize, value_grid: &Vec<Vec<i64>>,
+    risk_grid: &mut Vec<Vec<Option<i64>>>, repeat: bool)
+{
+  let mut height = value_grid.len();
+  let mut width = value_grid[0].len();
+  if repeat {
+    width *= 5;
+    height *= 5;
+  }
+
+  let mut exploration_stack = Vec::new();
+  exploration_stack.push((x, y));
+
+  let mut counter = 0;
+
+  loop {
+    let (x, y) = match exploration_stack.pop() {
+      None => { return; }
+      Some(value) => { value }
+    };
+    let risk_so_far = risk_grid[y][x].unwrap();
+    counter += 1;
+    if counter % 100000 == 0 {
+      print!(" [{},{} {}]", x, y, risk_so_far);
+    }
+
+    if x > 0 {
+      let value_left = get_value(x - 1, y, value_grid);
+      let new_risk_left = risk_so_far + value_left;
+
+      let risk_left = risk_grid[y][x-1];
+      let should_move = match risk_left {
+        None => true,
+        Some(prior_best_risk) => {
+          new_risk_left < prior_best_risk
+        }
+      };
+      if should_move {
+        risk_grid[y][x-1] = Some(new_risk_left);
+
+        exploration_stack.push((x - 1, y));
+      }
+    }
+
+    if y > 0 {
+      let value_up = get_value(x, y - 1, value_grid);
+      let new_risk_up = risk_so_far + value_up;
+
+      let risk_up = risk_grid[y-1][x];
+      let should_move = match risk_up {
+        None => true,
+        Some(prior_best_risk) => {
+          new_risk_up < prior_best_risk
+        }
+      };
+      if should_move {
+        risk_grid[y-1][x] = Some(new_risk_up);
+
+        exploration_stack.push((x, y - 1));
+      }
+    }
+
+    if x + 1 < width {
+      let value_right = get_value(x + 1, y, value_grid);
+      let new_risk_right = risk_so_far + value_right;
+
+      let risk_right = risk_grid[y][x+1];
+      let should_move = match risk_right {
+        None => true,
+        Some(prior_best_risk) => {
+          new_risk_right < prior_best_risk
+        }
+      };
+      if should_move {
+        risk_grid[y][x+1] = Some(new_risk_right);
+
+        exploration_stack.push((x + 1, y));
+      }
+    }
+
+    if y + 1 < height {
+      let value_down = get_value(x, y + 1, value_grid);
+      let new_risk_down = risk_so_far + value_down;
+
+      let risk_down = risk_grid[y+1][x];
+      let should_move = match risk_down {
+        None => true,
+        Some(prior_best_risk) => {
+          new_risk_down < prior_best_risk
+        }
+      };
+      if should_move {
+        risk_grid[y+1][x] = Some(new_risk_down);
+
+        exploration_stack.push((x, y + 1));
+      }
+    }
+  }
+}
+
+
+fn get_value(x: usize, y: usize, value_grid: &Vec<Vec<i64>>) -> i64 {
+  let height = value_grid.len();
+  let width = value_grid[0].len();
+
+  let tile_x = x / width;
+  let tile_y = y / height;
+  let increment: i64 = (tile_x + tile_y) as i64;
+  let raw_value = value_grid[y % height][x % width];
+  (raw_value + increment - 1) % 9 + 1
+}
+
diff --git a/15/tests/main.rs b/15/tests/main.rs
new file mode 100644
index 0000000..3e205b0
--- /dev/null
+++ b/15/tests/main.rs
@@ -0,0 +1,17 @@
+use assert_cmd::prelude::*;
+//use predicates::prelude::*;
+use std::process::Command;
+
+
+#[test]
+fn personal_input() -> Result<(), Box<dyn std::error::Error>> {
+  let mut command = Command::cargo_bin("advent_14")?;
+
+  command.arg("input");
+  command.assert().success().stdout(
+      "562\n\
+      2874\n");
+
+  Ok(())
+}
+
diff --git a/Cargo.lock b/Cargo.lock
index 841bb26..751fe79 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -113,6 +113,14 @@ dependencies = [
 ]
 
 [[package]]
+name = "advent_15"
+version = "0.1.0"
+dependencies = [
+ "advent_lib",
+ "assert_cmd",
+]
+
+[[package]]
 name = "advent_lib"
 version = "0.1.0"
 dependencies = [
diff --git a/Cargo.toml b/Cargo.toml
index 1bdc5f3..d8cc993 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,4 +15,5 @@ members = [
   "12",
   "13",
   "14",
+  "15",
 ]
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-21 21:14:57 +0000