things.

.gitignore

@@ -1,3 +1,5 @@
 /target
 2016/twenty16/target
 2024/rust/target
+2023/rust/target
+*/target

2024/rust/Cargo.lock

@@ -6,9 +6,19 @@ version = 3
 name = "advent-of-code-2024"
 version = "0.1.0"
 dependencies = [
+ "regex",
  "tabled",
 ]
 
+[[package]]
+name = "aho-corasick"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "bytecount"
 version = "0.6.8"
@@ -27,6 +37,12 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "papergrid"
 version = "0.13.0"
@@ -78,6 +94,35 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "regex"
+version = "1.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b544ef1b4eac5dc2db33ea63606ae9ffcfac26c1416a2806ae0bf5f56b201191"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-automata",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.4.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "809e8dc61f6de73b46c85f4c96486310fe304c434cfa43669d7b40f711150908"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"
+
 [[package]]
 name = "syn"
 version = "1.0.109"

2024/rust/Cargo.toml

@@ -5,4 +5,5 @@ edition = "2021"
 authors = ["Dan Chadwick <dan@danchadwickdesign.com>"]
 
 [dependencies]
+regex = "1.11.1"
 tabled = "0.17.0"

2024/rust/inputs/day3.txt

@@ -0,0 +1,6 @@
+$]~?,'mul(268,621)why() mul(668,915)mul(887,633)from()!where(998,493)how(230,27) mul(940,760);'/when()*!;~mul(71,701)-{mul(448,270)mul(925,62)mul(414,959)when() % select()how() ;><mul(416,836)#where()>@*<>why()mul(703,154))&how()*]select()+>;(mul(480,365)mul(724,324)what()from()~!(:,who()mul(226,399)'~mul(212,790)#!&]-mul(876,690){mul(233,661)!   don't()~+-how()from(){mul(509,769)<when()}select()why()what()}mul(451,517)&*~select()>when()->mul(87,282) *$;how()what(),mul(617,13)+where() when()mul(657,513)#>(( %#&%]mul(320,507):$%from()select();!what()mul(724,705)how()$why()~select(),,how(959,725)mul(149,615)}mul(450,692)mul(170,701)how()$mul(59,770)how()!,[$[what()mul(436,740)#+%mul(14,222),'when()who()>+]+{mul(116,16):(~@#!{who()mul(349,134)%select()when():^?{from()@*mul(933,635)?mul(653,875)>:,(->how()'}mul(963,506)when(280,474)where())+when()select()mul(568,226)[;mul(181,212)%+where()mul(720,273)don't()%mul(954,188)how()^mul(518,842)}#%what():mul(990,844)what()?<when()]mul(151,203)( (+>why()when()~@mul(434,665)@]mul(603,96)#'}&}/mul(878,991)#-&select()select()!]what()*mul(10,199) #from()*%>];mul(197,660)-mul(921,878)where()what()-<from()when()mul(414,11)do()&}how() ++#mul(834,70)^++]do()*('(;%}+mul(229,122)<-mul(246,512)@#,~@)$mul(144,702),select()^^what()[where()where(989,666)~mul(641,578)$!mul(854,445)'{)when()mul(485,421),]mul(203,14)(mul(964,896)#what(219,318)}@why()when()}:#mul(40,891)$]mul(593,751)where()mul(755,69)what()'!mul(295,76)when()[~(}when(815,693)mul(115,764)what()from()mul(572,436)[#) #?where(641,661)+mul(582,92)[/&when()/</:: mul(653,493)mul(516,59)<'}[what(257,655)mul(15-^why(279,495)!]!#%?why()&mul(273,379)how()+){!?mul(317,463)when() ]!what()}mul(188,340)mul(274,697):@mul(546,487)!mul(412,582){^**{)?@mul(477,785)where()(?mul(376,158)@*don't()#^mul(178,395)/&[?%$/mul(411,217))[)(,'mul(538,300);&+~who()@mul(469,107)$:,?$~]when()>mul(447,619)who(300,310)}+-when()where()<mul(872,71)$why()'when()/,($when()mul(238,409))[):mul(60,472)*{do()@#how(520,828)from()>mul(727,831)from()^mul(982,400)/-who()+(>(&select()mul(508,679)^('*'mul(549,463)']*select()>'+?'mul(149,313),':)mul(226,577)^how()who()mul(347,528)]~<mul(633,771) ([;}}<}:{mul(271,100)where()$from(587,500)$*mul(974,539)}*?:[+/>mul(323,513)mul(204,877),,select(){mul(290,987)>when()select()~what()()mul(131,943)why(726,908)when()why()/&$what() >mul(629,63))&mul(281,287)!^ /mul(615,191)mul(932,78)%&)]when()/~%%#mul(769,253)+@}/what()@]mul(118,261)how()when();*why()?why()mul(886,136)from()why()>]+[$mul(825,656)>mul(150,646)+:# ))(!select(72,556)who(247,255)mul(560,142)<&&'&]}};mul(821,966(mul(965,238)^:!'^%)$(where()mul(59,811)how()/from()-<from()}[*when()mul(146,176)
+/what()what(){?mul(835,756)how()]where()'<!'!#why(636,26)mul(655,281)-($<;#when()when()%'mul(553,980)+,why()+when()&how()%mul(976,110)<from()>mul(125,745)[{~@{/where()^when()mul(135,726)what()+>where(),}( mul(777,401);why()*what()>mul(273,895))who()what()^~}mul(262,790[<}?mul(63,369)how()>-@what()why()how()who()$don't()<~!why()@&{where()mul(826,512)-}&when():where()!&mul(450,950)mul(419,483)$from()how()do()who(178,159)mul(683,505)how()^mul(455,197)&select()/'what()'do() ^,[&^*mul(82,385)^;&from()!mul(204,650)what()<* mul(740,616)+(~*&+}>mul(960,112)*>}?^[(mul(514,803)why()}mul(444,392)#<&when(716,989)^mul(561,408<{don't()when()select();!)%%'*mul(443,654)how()!where(),-where()+{why()what()mul(662,268)]-!@)mul(112:@][[+how()&;how()mul(795,729)how())#$:~+where(869,115)^!do()(/+><#mul(825,562)#,when()@+?,<)how()mul(234,478)do(),$ [>mul(256,258)from()}{%how()#]mul(128,475) why()>:&mul(551,920;how()/select()&@'/$-?mul(162,185)-!)}select()*//$mul>$!where()/?/*}'mul(638,747)+who()(how()[from()(mul(703,27)select()when()when()mul(930,930)}don't()?[]why()^]who()when()[mul(776,659)</,-mul]mul(855,370)&-/}]]@'mul(591,102)from()mul(62,380){from()?)mul(44,125)?where()mul(149,129)from(),where()]- mulwhen()who(136,919){-+~how()when()>mul(210,715)$select()>mul%mul(731,236)!-{-?#&^~mul(287,758)'@?'how()from()mul(68,771)]]from()from();:-/mul(136,737)$what()why(771,834), }/:}mul(371,748)mul(476,154),!+why()from()select()%-?^mul(708,880)}why()from()}when()&> *mul(212,632)^^<#why()when()do()/;mul(864,803)mul(12,609:}what()what()what()],mul(731,140)^from()mul(826,563)(>~^'&?who()mul(315,307)how()+mul(562,147&%*%when())who()[^;}do()how(372,554)$:](from()!/mul[},+,mul(797,390)what(407,406)what()when(),:mul(819,147)[*mul~how(384,366))'mul(405,193)why()+who() who()**mul(862,595)select()mul(384,147)-{, what()what()do()@~+@/how()<when()how()-mul(952,896)?select()@%$mul(760,82)mul(574,265)don't()from()++what() &mul(594,364)# $~what()'where()mul(671,670)'#@!$#from()why()<mul(66,753)where(){select())mul(182,165)why()?when()>)%mul}mul(661,115)>?['do()mul(35'}@#>*~&mul(963,48) <mul(12,9):@when()when(){*how()?mul(195,687)!;who()~,<>>who(492,300)mul(524,257)#(~~mul(392,601)$ &;do()$%mul(482,146)mul(787,904)[~@!~-why()mul(229,907)where()who()(mul(357,675),mul(453,241)who())when()[~+mul(502,25)']]select() &[#@)mul(743?,@~mul(370,914)mul(824,56)+who(),how()'*from() @mul(330,830)why()what():/^/where()where()mul(400,891)&} mul(660,956)%;&select(693,80)};mul(974,635)+<]](mul(946,953)>who()&why()mul(753,83)what()],['$%mul(764,682,when()%+@';:why()%mul(656,275)mul(605,22)@[mul(688,929)what())~:mul(724,267)>--mul(480,89)mul(237,945)~@[(*mul(636,205)@{^]mul(441,199):?select()mul(563,508)mul(103,692)mul(52,210)@^who()*&!>$who()!mul(989,419),[<-select()who()select()&mul(613,351)!~;%^*:mul(580,115)mul(516,628)when()(^%,>:do()mul(286,899){-$?]+):when()mul(990,247):#select()#why(532,636)*%):'mul(86,546)how()mul(234,253)from()how(),,!mul(407,308))select()mul(240,422)mul(632,751)(mul(506,967)mul(548,606);,,&^mul(788,227);>:]%mul(111,533)mul(126,215)
+]/mul(147,892)why():>^when()$>$&mul(303,773) how()don't()')where(184,885):)from()mulwho()*mul(876,387): why()mul(84,297)mul(315,341)what(690,97)?don't()]{!when()from(){what()mul(197,255)mul(855,166)(}~$mul+*>* }mul(64,27)^<~~*when()@mul(735,281)what()*$*'/}##$mul(959,785%from()![how();where(831,805)mul(411,892)(/from()#>do()who()/*]!what()?mul(629,216)}&,!mul(56,589){~+]&}(mul(922,707)what()# )# mul(880,584){]:mul@{where()*what()who(321,62)^%where()mul(557,582)<>^  mul(612,179!%&^:'?what()@mul(450,229)%mul(855,946),]who()%<@&?mul(487,412){]~;when()mul(583,461)select()select()what()<*%when()mul(181,955)do()$)/^::why()select()why()}mul(562,105)mul(751,114)')&,when(){>{mul(197,218)*mul(840,115)&}#<@$mul(712,194)+^};when()who()^}!don't()?#how()(what()mul(323,807)! -(-$/mul(591,888)!;mul(242,761)mul(619,608)-~who()&&*mul(518,709)what()! < ,where())%!mul(734<@/*who()$do()who()from()]$*how()+mul(599,103)mul(571,370)?&from()from()mul(409,542)@/,'({{mul(593,239)what()!(?mul(735,478)?mul(292,372)?-where()mul(642,507)why(){from()mul(889,136)how()/-*why()/from()/:-mul(413,457)[(where()(mul(202,599){};+when())what(547,682)#mul(719,361)]!**mul(976,244)'how(927,878)@when()'!mul(422,110)who();select()#why()where()@mul(224,849)(]& {where()>select()#mul(924,968),select()~when(272,716)]mulwhen()!;&do()*/?[mul(336,583)-{where()how(366,471)how()how(523,337):who()where(693,273)/mul(243,820)?^mul(853,171)++%mul(478,163)[-how()};]when()'?select()don't()#;where()&(;):what()mul(80)select()@when()mul(712,952)mul(262,548)from(165,167),@:mul(899,582)>$*$>^mul(686,196)>:*?(}mul(929,419)mul(998,303)$<,why();$mul(880,38)why(405,795){select()mul(215,866)'what()- %how():<don't()),+!-?who(971,350)[@mul(421,250)from()who() who()[;mul(131,149)$#from()when(412,746)mul(714,190);~{*}where()>who()[mul(639,467)<from()when()-%how()+*mul(65,827)mul(602,655)%what()/(mul(452,487)?do()what()?what()'-{)<[mul(493,789),who(339,679)/@?&mul(874,48 $+mul(26,167)*(mul(516,76)who())<where()]:?mul(869,874)where()>')why()do()mul(690,973)when()how(161,404)<from(){where();[mul(220,766)mul(897,316)how()#why()'$from()@mul(684,371))mul(159,439)^^~mul(446,162)<<{mul[{!what()!where()?mul(886,787):}: from(){]%/%mul;>&mul(202,173)}mul(428,938){+;from()>,'mul(999,421)select()/select())&![?from()select()mul(999%mul(225,521)what(),who()'*how()from()mul(348,864)% who()#how()>{' mul(388,836)^^what()@<:mul(963,504),when()%^}~^;~mul(778,115;?^where() )what()^{)*mul(632,400)who()[why()>what(603,334)who()^$mul(831,297)*-%mul(362,398%+~why(426,765)?^where()>mul(327,876)who()/?%:from()<select()mul(822,774)mul(577,987)&@^;-?mul(548,583)!)mul(531,201what(173,685)@who()>select())mul(765,201) *mul(445,679)(};who()who()}mul(753,171!{~[?who(): '%do()):when(197,925)mul(538,681)/,why()mul}{ (*[mul(268,860)mul(408,458)mul(266,226)[? how()!from(), &mul(135,62)from()select()mul(340,25)what()where()  what()'mul(545,879){how()}#![who()%mul(638,670)!;where()~select()mul(479,848)mul(109,148)'how()mul(416,15)from()@/+<!+@+mul(606,592)]mul(722,360)what()from(){&)@< mul(876,290)what()when()}]mul(983,542)mul(985,495)(??select(932,48)when()#when();mul(383,988?%what()mul(519,18)how()}}*when()when(977,898)when()~how(545,749)when()don't()mul(459,715){&>$mul(897,986)
+@#*)^+?when()}#!/usr/bin/perl!mul(967,747)#~})what()$where()}(}mul(778,323)>:- }where()([&&mul(411,856)]-}mul(522,56)how()%+how()^;!-~do()~/)when()what()who()from()(mul(587,850)+what()who()from() ^who()-$mul(756,247) *what()mul(608,305)mul(684,567)when(366,8)]how(582,805)*#where()select()mul(766,413)?^ ^!%mul(496,516){who()'mul(314,640)%'&when()$$@from()*mul(278,921)#'{< $&%why()]mul(60,195)mul(817,525):@'#& (,mul(54,364)~~>!~+*?how()+mul(973,10<%why())>select()(mul(329,897)(how()}mul(106,169)@><)how()>who()'mul(326,837)[how()when()>mul(201,602)>don't()#^>)from()@]when();mul(913,201)!*>mul(346,648)where()when()*@<[do()?;]/!&!-mul(167,706)>{where()<{/select()/mul(690,524)''why()^>select();?mul(546,39);]when()/why()/!,from()where()mul(193,398)^/#when(),%)how()*mul(915,972)@{{*~mul(283,116)-mul(922,445)why()how()?:;>do()^^/~+{mul(218,56)}mul(4,84)[-;+>mul(625,977)#;how() *}when()from()}mul(238,60)!(~< >mul(518,730)@[(]mul(480,891)why()?,mul(739,807)^mul(248- >[$&mul(792,34)mul(429,330)why()from()^'what()mul(887,370) ^^do()&$$mul(878,990)select(988,557),:#[mul(935,519)(mul(627,252) )mul(370,34)mul(381,288)}(>?;}@>*$mul(205,870)}!from() /where()who():^!mul(925,721)<[select()+when()$+  {mul(58,683)who()where(574,239)what()when()'&[what(682,763),>mul(63,268)@*&<^mul(494*[/(:select()+$do()%from()])where()/ '}mul(605,58)who() from()^$who(907,117)mul(543,205)*'>{>) mul(203,851)]}mulselect()when()/when()?mul(108,926):[(>how():!)~^mul(435,239) how(917,967) why(740,79)mul(922,64$mul(718,98)mul(683,826)*)what()?when()what()@<):mul(685,595)/<{from()&select()mul(398,94)what()}#$%^]#mul(695,681)}{how()where(760,742)-]*mul(596,194)/when()who()[&,>$[?mul(576,392)-,&mul(726,538from()don't()mul(113,836)?what(158,900)?$who(),]}@(mul(589,112)'),)mul(513,45)how()'[,$when()!$ ~mul(552,559where()?]do()*select()[;;why()$mul(552,319)]~>where()where()~mul(203,829):mul(645,741)}> <from()/$+mul(855,250)&when()(-mul(542,287)how()<@what()$*where(598,870)mul(796,465)-)}mul(131,45){~)$]]+^where()mul(233,25)[?*:+how()-[+mul(380,251)@from()^~what()>-* 'mul(760,810)mul(484,762)-)&+mul(780,483), (+how()$-what()'mul(36,857),what(2,894)select(), !?mul(916,494)<{(&mul(965,701)]where()mul(393,273)#+from()mul(430,13) ++*how(626,996)#mul(399,24)when()#$:;{%,mul(940,82)^$!~what()>{/do()/select()mul(787,843)mul(521,553)%:/mul(208,377),#%@^+@^mul(987,863)!^select()who()-+do()where()&[<%&'where()~mul(366,478)!^why()?mul(57,407))~}mul(350,637)*how():*don't()>^?:!;]mulwhat()what()mul(740,90)<+select()where()! *-;*mul(117,865)-where()when()*>who()}what()mul(146,520)^]?*]+'mul(319,547):+from()(*%mul(555,298)-what()what()%what(521,465)mul(206,820)@*%: how()%[&mul(653,71)'from()mul(47,650):-who(203,412)who()&$!(<,mul(518,778)?why(721,752)why()-!*why()who()who()!mul(156,368)&from()[who()}who()-!mul(247where()'])mul(197,394)~<(]:do()select()where()!+(@when()who()/$mul(883,573)where()]+when()]>how()~'mul(625,896)from()from()~>*who()mul(354,189)what()what()<$;,&{~mul(49,83)who(699,589)from()[' &(,mul(482,242)@select()}mul(955,898)^],{mul(751,976)who(999,593)<do()~from()$mul$'@^$*,mul(286,266)&what()how()//{%mul(842,67)when()where(447,72)why()-^mul(341,551)
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2024/rust/inputs/day3test.txt

@@ -0,0 +1 @@
+xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))

2024/rust/inputs/day4.txt

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+MAMAXMAMXXMASMSAMSSSXAMASAAMMMMSMSXSMSMMMMAAAASMAAMMSAAAAMMMMMAASASMSMASXMXMSAAXXMMXMMSAMMSAMXXSASAAMAXSAMXMSSSSSMMSMMMSASAAXMMMXMXXMAMXXAAX
+XXSMMSMMSASXXAMAMXMMMMSAXMXMXASAXXMAMXAXSXSSSMMSXXSXSXSMMSXASMSMMAMAMMAMXMAMSSSSXXXXSAMAMXSASMXXXSMSSMXMAXXMMMXXMASXXAASMSMAMSASAMMMMSSSMSMS
+XMAMAAAASXSMSSMMMSAAAMMMMXAMMXMMSSSMMMMMMAMAAAMMSXSAMAXAMXXXSAMAMMMAMMMMXMAMMAMAXXASMXSSMASMMMMMXMAXAXAXAMXMAMSXSSMSSMXSXMASMSASMSAAMXAAAAMX
+XMAASMMMSAMAAXAXASMSMXAAAMAXMAMSXMAXMAMAMAMSMMAAMXMMMAMXMAMMMAMAXSSXSASASMSSMAMAMMMMAAAXMXMXSAASASXXASXSMMXSASMAMXAMXMAMASMMAMAMASMSSMMMSXSX
+XMAMMAMSMAMMMSMMXXAXXSMSXSAASAMXASMMSMSASAXXAXMAMAMAMXSSMASXMMMXMMAASASAMAAAMAMAMXXXMMSMSMMAMSMSASAMXMMAAXASXMMAMMMMAMASMMXMMMAMXMAMXMSXAMSX
+XXXXXMMASAMXXSXXXMSMMMAAAMXMXAMSMMXMAASXSMSMMMSAMMSASAAXSAXMXXSXSMAMMXMAMXMASXSAMXXAXMXAAAMXXMXMMMMMMASXMSMSSXSASAASMSASAXXMXSMSSMXMASAMXSMA
+XXAMXXSXSMMXXMAMXMAAXMXMMAMMSAMAAAXSMXSAXAMXSASASAAMSMSXMXMMSAXASMXSMXSXMMSAMXSMSMSXMSSSSSMXMASXSAMXSMMAAMXMAMSAXAMMAMASMMMSAXSAAMSSMMMAMAMX
+SSMMXXAMMMXMXMAMMMSSMASMXSAXMASMMMMXXAMXMSAXMASAMXSMXAMXXMSAAMMMMXMAMAMASMMSMMSAAASAMAAXMAXXSXSASMSMMAMMAMSSMMMMSXSMSMAMAAMMASMSMSAMMAXAXAMX
+MAMSMMMMASAMASASXAAAMASMAMMSAMXAASMMMMSAMXAXMAMXMAXXMSMMSAMXSMSASXSAMXSAMAAXMAMSMMSAMXSMMXMMAMMAMXAMSSMMSMAAAXMASAAAXMSMSSSMXMAXMMASMSSMSSSM
+MMMAAAXSASASASMSXMSSMASMXMXMASMSMMAAAAXXAASMSAMXMSSXMAAXMAMAAASASASXSAMXSMMSMMXXXXSAMAXAXAXAAMMAMSMXAMSAAMSSMMSAMSMMMMAAMAXMMSAXXMAMAAAAAMXA
+SXSSSMXMASXMXSXMAMXAMXSAMXXXSXXMXSSMMSAXSAMAXXMXMMSXSMSMSAMSSXMXMAMSMXSAXMSXXXMXAMSMMXSSMSMSASMMMXSMXSMSSMMAMXMAXAMXSSMSMSMMMMMSMMASMSMMMSAS

2024/rust/inputs/day4test.txt

@@ -0,0 +1,10 @@
+MMMSXXMASM
+MSAMXMSMSA
+AMXSXMAAMM
+MSAMASMSMX
+XMASAMXAMM
+XXAMMXXAMA
+SMSMSASXSS
+SAXAMASAAA
+MAMMMXMMMM
+MXMXAXMASX

2024/rust/src/day2.rs

@@ -6,26 +6,24 @@ pub fn run_day_2() -> Solution {
     // Fetch the file.
     let reports_file = fs::read_to_string("./inputs/day2.txt").expect("unable to read file");
     // Init the safe reports count.
-    let mut safe_reports = 0;
+    let mut safe_reports_p1 = 0;
+    let mut safe_reports_p2 = 0;
     // iterate over each line to check if it matches the conditions.
     for line in reports_file.lines() {
-        let failures_on_line: u32 = 0;
-        let mut increasing_or_decreasing = false;
-        // cast to string.
         let line_string = line.to_string();
         // create a vector with each character for iteration.
         let report_numbers: Vec<u32> = line_string.split_whitespace().map(|s| s.parse().expect("Conversion Failed")).collect();
         // Now we have report_nums populated with the numbers to check.
         let valid_report = validate(&report_numbers);
         if valid_report {
-            safe_reports += 1;
+            safe_reports_p1 += 1;
+            safe_reports_p2 += 1;
             continue;
         }
-        // iterate x amount of times and check if valid.
+        // remove each item one at a time and re-validate.
         let mut dampened = false;
         for i in 0..report_numbers.len() {
             let mut report_copy = report_numbers.clone();
-            // handle the first iteration.
             report_copy.remove(i);
             if validate(&report_copy) {
                dampened = true; 
@@ -34,15 +32,15 @@ pub fn run_day_2() -> Solution {
             
         }
         if dampened {
-            safe_reports += 1;
+            safe_reports_p2 += 1;
         }
     }
 
     // Final solutions go here.
     let solution = Solution {
         day: 2,
-        answer_1: "463".to_string(),
+        answer_1: safe_reports_p1.to_string(),
-        answer_2: safe_reports.to_string(),
+        answer_2: safe_reports_p2.to_string(),
     };
 
     solution

2024/rust/src/day3.rs

@@ -0,0 +1,68 @@
+use crate::Solution;
+use std::fs;
+use std::process;
+use regex::Regex;
+
+pub fn run_day_3() -> Solution {
+    let file = fs::read_to_string("./inputs/day3.txt").expect("Unable to parse file");
+    let re = Regex::new("mul\\((\\d{1,3}),(\\d{1,3})\\)").unwrap();
+    let mut part1_sum = 0;
+    for mul in re.captures_iter(&file) {
+        // Multiply the second and the third matches.
+        let num1: &u32 = &mul[1].parse().expect("Conversion failed");
+        let num2: &u32 = &mul[2].parse().expect("Conversion failed");
+        let total = num1 * num2;
+        part1_sum += total;
+    }
+    // get all matches of do and their index
+    // get all matches of dont and their index
+    let mut part2_sum = 0;
+    let dont_regex = Regex::new("don't\\(\\)").unwrap();
+    let do_regex = Regex::new("do\\(\\)").unwrap();
+    let donts: Vec<u64> = dont_regex.find_iter(&file).map(|m| m.start() as u64).collect();
+    let dos: Vec<u64> = do_regex.find_iter(&file).map(|m| m.start() as u64).collect();
+
+    for mul in re.captures_iter(&file) {
+        let start: usize = mul.get(0).unwrap().start();
+        // get the closest number, that is lower than the start value
+        let mut closest_dont = 0;
+        for i in (0..start).rev() {
+            let mut index = i as u64;
+            if donts.contains(&index) {
+                closest_dont = index;
+                break;
+            }
+        }
+        let mut closest_do = 0;
+        for i in (0..start).rev() {
+            let mut index = i as u64;
+            if dos.contains(&index) {
+                closest_do = index;
+                break;
+            }
+        }
+
+        if closest_do > closest_dont {
+            let num1: &u32 = &mul[1].parse().expect("Conversion failed");
+            let num2: &u32 = &mul[2].parse().expect("Conversion failed");
+            let total = num1 * num2;
+            part2_sum += total;  
+        }
+
+        if closest_do == 0 && closest_dont == 0 {
+            let num1: &u32 = &mul[1].parse().expect("Conversion failed");
+            let num2: &u32 = &mul[2].parse().expect("Conversion failed");
+            let total = num1 * num2;
+            part2_sum += total;  
+        }
+    }
+
+    // Final solutions here.
+    let solution = Solution {
+        day: 3,
+        answer_1: part1_sum.to_string(),
+        answer_2: part2_sum.to_string(),
+    };
+    
+    solution
+}

2024/rust/src/day4.rs

@@ -0,0 +1,54 @@
+use crate::Solution;
+use std::fs;
+use std::process;
+
+struct Direction {
+    x: i32,
+    y: i32,
+}
+
+pub fn run_day_4() -> Solution {
+    let file = fs::read_to_string("./inputs/day4test.txt").expect("Unable to parse file");
+    let search_map: Vec<Vec<char>> = build_search_map(&file);
+    let directions: Vec<(i32, i32)> = vec![
+        (0,1), // N
+        (0,-1), // S
+        (1,0), // E
+        (-1,0), // W
+        (1,1), // NE
+        (-1,1), // NW
+        (1,-1), // SE
+        (-1,-1), // SW
+    ];
+
+    // idea 3.0
+    // iterate over each letter in the word search
+    // for each letter, build all possible words around it
+    // we know the character length is 4 (XMAS, SAMX)
+    // so if we have a given point, i.e. (3,4)
+
+    dbg!(directions[0].0);
+
+    // Return the solution
+    let solution = Solution {
+        day: 4,
+        answer_1: "test".to_string(),
+        answer_2: "another".to_string(),
+    };
+    solution
+}
+
+// Builds a searchable map.
+fn build_search_map(row: &str) -> Vec<Vec<char>> {
+    let mut search_map: Vec<Vec<char>> = vec!();
+    for line in row.lines() {
+        let char_vec: Vec<char> = line_to_chars(&line);
+        search_map.push(char_vec.clone()); 
+    }
+    search_map
+}
+
+// converts a line into a vectory of chars
+fn line_to_chars(row_line: &str) -> Vec<char> {
+    row_line.chars().collect()
+}

2024/rust/src/main.rs

@@ -4,6 +4,8 @@
 use tabled::{Table, Tabled};
 pub mod day1;
 pub mod day2;
+pub mod day3;
+pub mod day4;
 
 #[derive(Tabled)]
 pub struct Solution {
@@ -31,11 +33,12 @@ fn main() {
     let mut rows = Vec::new();
     let day1 = day1::run_day_1();
     let day2 = day2::run_day_2();
+    let day3 = day3::run_day_3();
+    let day4 = day4::run_day_4();
     rows.push(day1);
     rows.push(day2);
-
+    rows.push(day3);
+    rows.push(day4);
     let table = Table::new(rows);
-
     print!("{}", table);
-
 }