Implement day 08 2021

2021/inputs/08.txt

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+gbdfcae ebcg cfg gc facegb fecab acfge cbfgda fedag caebfd | ecbg bfcagd faegc gcf
+eacgf efcab fgc fedagc gdeaf cged aebfgd adcgfbe gc bdgcaf | fgbacd cfega ecdg cg
+dfgae gcadef efb eb dcabf bgde edfba bcfaeg egcdfab fbgade | bged eafdb eb gfdea
+aefdb cafdgeb egdfac egdcba fcbd efd eadcb caefbd df aegbf | cfadeg abfedgc fde bfcd
+dc deafg ecd dbaefc adcfeg cfged ecbfg acdg cafdegb gfeadb | dcga edc adfebcg ecgfb
+befdc bcfge befad degfab cde aecbfd gcedaf eafcgdb dc bcad | bdeafc cde ebdcafg daebgcf
+cd egdacfb fdc fecgb gabdf fbcdg fcgdeb gdcfea debc ecfbga | gfecb fbgecd bcgef dc
+fagcdbe gec gbdea ce bgedc aecd cgbeaf cfbdg gebcda dbfgae | cfbaged cgbeaf ceg gadfbe
+gcbaf gfdb bdafc df adf adcbefg dcfeag cebad adfgcb faecgb | afd agfedc dcbfa gdfabc
+fbae cef fecdbg afbcg cefbga fe acdfgb gadce fbdacge fcage | fe abef gfbac cef
+cfdebg bg beg cabfeg fbgd acged ecgbd fdcbe cfbeda cebgadf | fbedc gadce gdaec bcfed
+gba ab fgbcd gedaf bcadge afbdgc cdgfbe agdfcbe bcfa bdfga | gab gdbfc ba fgdbcae
+fabdgce bfdgac cbaed dcb bgade fbaec fcde edbfac gfabec cd | dc cefd dc cd
+afc dbecafg fagce fbega fbgc edgca agecbf bafged eacdfb cf | cf bfdcaeg gfbc gfbc
+gedcb ebda cgbdfa fcaeg gab bfgdce ba agbce bdgecfa dgebca | bdgfce cebagd cbdgfae dcfbeg
+egbacf acdfe gfecb egdfcb dfgaceb dfb dgcb fdbce db bdeafg | fdb db db bdf
+cfeg eabcf gdefcab bef geabc bfcad egbadf cfgbae egcdba fe | fgec gaecfdb cagbef ef
+bafde dbgeac feacgbd cbaef bed bfgaed gafecd bgdf bd eafgd | db cfgdae caegdfb fabed
+afg bacg cdbgf gcdfab fdcae gafdeb dbgfce ga dcafg cedabfg | gaf bdafgc agbc ga
+edgca bafdcg acbdg cbdeag dce fgcea gdcfeb aebd ed gfdabce | ebgcad daeb edcga ced
+agecf abfegc dbefcga ad dafc fegdb adg afgde bdcega ecagdf | fadeg dfac dga da
+ceagdb gedac acfdbg cda bgecafd adgeb dcefg ca beac abgfde | aegbd baegd bdcagf abcdeg
+egaf bagdce dcgabf ea eab cgbfa cdfebga fbcae dfcbe fgbace | gdfaceb gfea dbcfe eba
+cfbega bge eg cgdebaf gedbc adeg bceadg bfadcg agbcd cdefb | ge ge cfedb fbgadec
+afc ca cabe gbefcd aebcgdf acedf gbafdc eagfd edcfab dfbce | gbfdcea fca aecbfd ceba
+af bcdag agbfde fdbca ebdfc adf dbefcga abedfc aefc dbgcfe | af acfe adf adcfbe
+badfe agebd gfaced gbdcafe aecfd fab dbfc geacbf adbcfe bf | fb ebagfc beadf dface
+bfeda gabefd agbedc ec fcadeb dfbaecg cea fdec afceb agfcb | fbcae cfde eac fedc
+ebcf eafgcb egdfba dfcag bacge faceg afe gdceab ef dgcbaef | fcbe febc bcaeg cbfe
+dafbc afdebg egfc ce eagbcd ceafgbd fgeba cbefa eac fcgeba | afegb cdagbe cbdaf gfaeb
+ecd dface cdgafe gcabfd edbgcfa gdacf fecg cdbaeg ec efbad | edbaf gcafd dcgbaf dafgceb
+gd fagbec bdfg gde cfgbe cefdbg gbdeacf agdcef bdceg bcdea | dg gcfeba dg ebdcg
+bg bgdeac abdg cgb fcbade gdbceaf fbdgce dbeca gaebc aegfc | cgb befgdc fedgcb gbc
+gac cgeda egcbafd gfdbce fadec ag degbca agecbf dagb gebcd | cdegb degcbaf cedaf edafc
+ecfab bfacdg bdga gb cfgba bfg gefdacb cegdfb fagdc cafedg | bfg cefba gb aedbcgf
+dgfce aeg cfbdgae acfgeb ebcafd ag gafed gaebfd bdga dbfea | gae cfbdae abedfg bgfdae
+cgbad cbaf fbgeda dfgcab fdcebg dbfcg decag cdagbfe bga ab | dfcabg cbfa fcedgab adfcbeg
+cegbadf edfgba cafeg dc agdebc dbgfe cdbefg dec dbcf edfcg | bdfc facdegb adfegb egbfd
+bedf cefadg ced ed bcegd gefabc agcdbfe cdgab gcfbe fgcdbe | ed cde bdgec dbecfg
+egfcab debfa ecd bfgec cdgb cd bdcef dgebcf ecdabgf egcadf | becfd cbgd gcdb fcbed
+bc dbfge gbecf caefdg gefabc abgdcf bfc baec efcag cebgafd | baec fegbc agfec cgbef
+bacegfd fbdgca egbcf fabce bdaefc dcaef dagefc ba dbae cab | daeb cbefa cab ab
+fgab cgdfae fcgebd gb bcg dbaegcf cabed gadcb gcafd gbfadc | gbc adcgf dgecbf cgb
+gdaeb df cgaebdf dfbe cbdagf eabdcg gfd aecgf aefdgb agedf | dfg gfcea febd ebdag
+ecbaf cagfdb aecgf gac ebga defagcb baedfc gfcde ag gfbeca | cadbfg gaecbf agbfec fecba
+edbgaf fbd egdbfca dagf gabde bdfge fd bgcfe efbcda eacdbg | fbd ebcdaf dbgaefc gefbda
+acdbg aefcdg cdg cegb acebfd abgdf cg fbegadc gcbdae eabdc | gc edafbcg gadbc cg
+fgcd bgdafe bacge dg facgde acfde agdec gdefbca deg aebcfd | gd eagdc ged ged
+egfa efdcba dfbgc cbfea ga abcfg edgcab bga fecgdab aebfcg | bga faegcbd bfeadc badcge
+bfeda ceagdb bf ebfacd edacb acefbdg begcdf bafc agfde feb | fb fb fbac bcegad
+bfdcea dcbgaf cbega dbage cea ce cbafg gefc bgacfed bfecag | abgfc ec cegf acdefb
+adgfce cdag cd fgecab cfgae ced fdbae gebdfc agbcefd ecafd | dfcae dc fdcae ebafcg
+dbeag begfad bfdegac dcb cb gcfda ecdgfb ceab gcabd dcebag | cbd cb cegbda bgcdef
+cdfaeb fgebad ea dcbgfa gcaebdf cegbd bdcae fabcd cfae eba | caef bafdce afec gfdbea
+bcfega gcbea bdfgeca gabcd bd gdcabe dafcg ecdb dba ebfadg | fceadbg fbaceg db bd
+gadcbe dgb debcaf fabgcd bcgfe bdgcf acfedbg gd cafdb gdaf | eafdcb bcfade badceg bdacfg
+gafce cabde cdf aefbdgc efacgd fgeacb ceafd df efgd badfgc | edfg acbegf dfc gedf
+afgce gbdecf bae adebcgf bgedca abecg abcd baefgd ba gbdec | ab dfagcbe gbeca ab
+de dcgaf gcfbed gdebfca acegb cde bcgafe abed gdacbe gecda | ed afgcedb deagc gcdaf
+gcdef ebfadc da dabefg daf fbaeg gaefcb dfeag gbdfcea bgad | gadfbe bafgce dgba afd
+bdfeg gecf fc egdfcb gcbedaf bfc dfcbe cbdfga baced abedfg | fcge fgdecb dcgfabe fgdeb
+bdf acbdfg bdaefg aefgbc abcde dagebfc fd dfcg cabdf cgfab | bfadc cabfg gfcdab fbaegc
+af cdfbega edbfac dfbgc fac adef adecb becagd acdfb efcbga | bcagfde bdfcae gfdecab eacbd
+egfcad bdgeac fdac fed cdage fd gcbfed baegf gfedcab gedfa | adceg fd afebg egdca
+fegba ecbafgd cfegba cgdab efbgad ec fadcge ecg bcef cegba | bgadc ce fecgdba baceg
+bdfaeg abgedc efadg bafd gfeba fcdebga adg aecgbf da ecfdg | ad ad dfba befcgad
+efadcg dacfb cfgab bfde eafdc decfbag decbfa bd bcd acebgd | debf cafde gcdafe fcgebad
+agd cgadef gcdebfa gd facge bdfgea eagbfc dcgaf cafdb ecdg | cbgfae ebfcga agcef bfdeag
+dfbge abefgd aefbcg dcfegb ba fgbad gedafbc bdea fba dcafg | agfdb fab fba fcbgde
+fcdab agbecd eacgfb gc fgeabd gdabc dgbea cbfdeag cag dceg | fcadb fbcad degba gca
+eag cbefg dfeagbc cdfbga egcba dcegba dace agedbf ae gadbc | cegba age agbdc dbcafg
+cdbag gfb dgceba cbfa gfdbac faebcgd deafg dgbaf fbegcd bf | eagdf febgcd fbdag gdfbce
+cdbgf afcebg acfdbe ed ced bdefagc dcgbea fbeac cbdfe adef | cfbde de dec ecd
+dfc fbcde dfcbga ecbgd egbdca fd eabfc edbfgc efdg cdfegab | df dgef fgbaedc df
+fcg egcbd gacefb dfgbc abfcgde bfdga cfed cf gdebac gbecdf | bfdcg fgc fbcdg agdbf
+fcabg acfbedg bfcgde ecbad agef ecfgba ecf fe dafbgc baecf | aegfbc cfe dbace fec
+edbagc cefbda bfdeg af agcf gfebdca fgdcab dgcba baf fabdg | bcadef dfgcab abdcfe gedfb
+acegf efbgcd dgbefac cgd bedga cbad agcedb dc egadc feagdb | badcgef cd dcgbfae cd
+bfc cdafeb bcega gdcf afgdbe egbfd caebfdg gcefb cf debcgf | gcebf bgedf dfbgea fc
+dgfaceb gcdf dabcg fd dfgba aefcbd bdacge gfabe afd dcagbf | daecgfb gbecda dacbfe gdcba
+fbgedc bfcda cfg dafbge fecdbag cagfd aecg agfde cg adgcfe | ecdfagb gfceda gaebdf gbfdea
+afbe gfa gfdcb af febcadg faegcb bcgea aedcbg eagfcd afgcb | bagcf gfdeca abfe af
+caefg efd fd abedc fcgd egdcaf egafbd gfcbea dafec abgedcf | gaebcf fcedga def egcafbd
+dcfab gefdcb bda da baefc baedcfg gfda dbceag cbfagd fbgdc | cdebga efdgbc fbcgead beafc
+bgfed fdaegcb bedagc da bdacfg gda eacfgb cadf dafgb cabgf | dgceab da dfbeg bcegad
+cedab fc adbfec faegcb adbgf cfa ecdf ebagcfd dcbfa ecgabd | becdaf cefd abdfc efcd
+cdgbea aeg agdec dafgbc gbed aegbcf ge aecfbgd cagbd cafde | ceafd bagcd gacdb cgbad
+dgfeb bedag cgdefa df gfdaeb cbdega gfdceba gbfec dafb gfd | fabecdg bdfa bdaf dfba
+gdfe acdbf ed bdegcf cegbfa cebfd deb badegfc fbcge bgaced | ebd efgcabd bfcda dfeg
+abfcedg gec fcgdbe gaebc gebfac efbdca gfea acbfe gbdca ge | agfe cge cdbgfe bcfdea
+fgbaed dacegb dacef egafd aecbgf adfcebg bdfg ged agfbe gd | agdfceb gd dg fbgd
+egdb acgbef edfac bd fgecb gbadfec bcafgd bcd bedcf gdecbf | bdc bedg gdbe efbgc
+cagbef acgbf fgcabde cgd gbda dg dbfgec ecafd dgfca dagbcf | agbcfe dcgfa dbagcf cgdafeb
+cb efbgc cgfae cgb gceafd beca fbcgae gefdb cbgadf dcfabeg | bgeacf bacedfg cbdgfa dfgbe
+cgbedf facgdb agfdc cga cafed gfcbd gcdbeaf degacb fbag ag | gbaf acfed gafcd cgfda
+egbdfca cadf bdafgc cbgfea cbgde bdcfg gfc cf fdbag gebdfa | eacdgfb fcda dfac adefcgb
+fdgea abcd ac cfabge cdbfeg gdebac acg gcdebaf gadce bcedg | gac abefgc ac gcaed
+eafdc eafbc agbe begcadf ba gcefba fgcbda gdbfce cba ecbgf | ba ab abeg adcgbf
+afg ga bdafe eadfg dagc gefcab edbcgf ceagfd ecgdf aedcbfg | agdc daefb debcafg fdaeb
+baf cbdgf afbecd gdcabfe dcfabg fadeg gbac gbadf ab cedgbf | fcdeba cbga afbdg bgca
+ebdfgca ebfdag gb bgf fdeagc gdbe cdfgba egfab abcef agdfe | gb gfbdea gdeb eafbg
+agbcdf fe gebad fea becf ecfbga cgabf aegfb fedgca acgbedf | ebgda ebdgacf fcbe aef
+gdbef bgfadec gfeab eab gdcfbe ab bfadeg fdab dcaebg acgfe | fgadbe fbedgc dgefb aeb
+adcbf fbdg bcf dcbag fecad cgafbd fb acdefgb bgefac dgcabe | dfcab cfb bf cdeaf
+dfgbca cdebagf cfe fcbga aefdg geafc bdecgf ce bgefac aceb | bace aebc gfbac efc
+adfegcb gcbaf fa adgcb acf efgacb fgcbed eadfbc agef fbgce | aefg acf gafe cfa
+fdegbc fcbad ec ebgaf gecfdba feacb caefgb degfba ecb geac | ecb ecb cfadb ebafc
+fegabc ebcgafd gfacde ge fcgeb ceg bagcf dcfbe ebga bdcfga | cefabdg fdceb abgcf gfeadc
+fdabcg bgafc fcbeag edbfg gadfceb ad adb dfca dcbgae dfabg | bdegf faedbcg da caegfbd
+cgfae gdbeca decaf fd dfbc fad dabegf daebc bedafgc efbcda | decfa fgcbdae fcbead dbegcaf
+dbeaf cb fabecdg bcfda gabfdc cbfg agdfce abc edgcba cgadf | bcdefag bcgf dafbc badcgf
+gbdcfa becfdg fdbcgea fgc cg fecdg efdgb ecadf gceb gadefb | gcbe fgcebda daecgbf aebcfgd
+cdega dgcaeb cbgea egdcaf gfacedb begfda cebfg cbda bag ba | ab egdac beafdcg faegcdb
+gab cgfab cfage fbaedc bcdg gb gacfbd defcagb gdebaf fadbc | bg fbacde gfabc dceagbf
+ge ebg cgdfb cedba bedgc ecag deagcb bfceda gdcfeab egdbfa | bge beg bafged cadbeg
+eabd ebacf ecd fdcbg dbafegc ed ceagdf fgceab ecfbda cdbef | dec dfcabe dec befca
+afbgdec cedb dc agdbf cegbf bfcedg cdg bdgfc baecgf ecfdag | cd dgefbc fdgcb cd
+gebdaf dgfae afe gafcbed agcfd febd edabg gbfeca bcdega fe | ebdag fedb egafd aegcbf
+gebdcf abefdcg deg bgdfc fcde gbfea gedabc edbgf ed bgfcda | efdbg fedacbg gbfacd fbdeg
+bcgd edagc gaebd bcdaeg fabedc bgefa fcadge agbfcde db adb | cgbdfae bdagcef badegc dab
+df fdb bfadceg bgeadf afbdce efdg dgbae dafbg cafbg abdgec | gdfe afcgb ebcgafd fbgacde
+gabce gdfaeb bcad cebdgfa fgcbae efgcd dga da cgdea cdeabg | ad agd gda gfedc
+fcabge edbfg fcaebd ea dcbagef gace gafcdb bafcg eaf fgbea | dcfbage aceg afbdceg ebcafd
+bafe egfcda be bfgaec gbe egcfbad fcaeg bdcaeg bgecf cfbdg | fabgced bfea gbcef gcfeb
+badfeg fgecb af cgaebd acfdbge gaf afcged gfaeb dfab egbad | fa fga abfd gabde
+afceg bcdfge fcaebg baegdcf cfg eabcdg bgfa efcad gcabe fg | abfg gf fbgecd acebgd
+acbedgf fb efgdc bgf gbcfd bgfdac dagcb fdbeag ebcdga fcab | bf gdebaf fb bf
+aecf cgbdefa bacged efbcga fdgcab febag af agf dgfeb ecabg | bcgdaf af cadfbge efca
+egfda fgceab acd bfcadeg dc dcega bfdcea gcdb cdbega eacbg | gabecd cd befgcad gdcb
+gecda dfegacb cgfae cdbfag fcbeag afg gf fbge dafecb caebf | dfaebc cfeab gf agdfbc
+gdafe cdgaeb egfdba da bfdgec gbfed eagcf egdbafc fbad dag | agfde dga dcgbfe abcdfeg
+acgdb gadfce cbefdga becad bcegdf bacgdf afbg ga dag dbcgf | abdgc gdeacf acdfbg ecdab
+gdfa eadbc gcafe dgc dg fcagde bcgfea decgfb egcda fbecagd | cegda cgdea gd dg
+ga egdbcfa aegcb cag egbcd gadceb gbcefd decafg badg cabfe | bagd cagfed gacdfeb cbegd
+cb deafc bcgd agfceb dbfega ecb deacb aebgd cbafdge ebdacg | dcgb adceb edgba ceb
+edgfab acgb becfdag bgf cgbdf cgfad dacbfg bg ecdbf afegdc | gfb bg gcfade gfbdeac
+caebg cgaf acgdfbe begcaf cf fdgeb agedcb ebgfc cfe fbcdea | dbfeagc cfe fbeagdc cf
+ageb bg adcbfge fcgea cbgaef cbdfa gfb fedacg bfgca fdcgeb | fbg afdcb ecgbdfa cgfdbe
+dgbfe aeg ea dcea dbeagfc fbacgd ecbdag gadbc bcafge adgbe | aedc ae gbdef daec
+dbafcg dbgaefc adfc egdab fdg df agefbc bdgcfe fbacg gdfba | bedgacf gcbaef cdfgab cafd
+eg fdgcabe gcadbe aebdc gced bagfde gea gbeac afbcg ecdbaf | agfbc fgdabe fcdgaeb feabcd
+fedb gfe defabgc caedg cgadbf feagd bdagfe fgbda efagbc ef | fe fgcbea ef dbfe
+bc agcb dfceg bafgdc gfabd fbdcg bcd ecgfbda ebadgf fbaedc | cbd fabcgd cgbfd bc
+ebfgc dbeg ed gefdc cde gfbecd fgdca caedfb gdbafec gefcab | fgdecb dgfce fbecg cabgfe
+ab ebda bfagdc becgd aecfg bag daecgb ebcag gbacdfe cfgbde | abedgc eafgc ebacg ab
+ecdbag dagbfe badef fcaed adc cd efbagdc cafge cfaebd dfbc | dcfb dca acd gcdabe
+cedbgaf ecbfg dagfec dgbea bdca gfdaeb ecgbd dbecga cd edc | ecbdga cde edbag dc
+egbfcd gbcafe ed defga dbgfa bcgdeaf cdea def eacdgf gacfe | bgfad ecda gbfad gcdefb
+dafge cea fdace agdc dbgfea ebdfgca dcbfe acedfg abecfg ca | defac gcad ac ca
+ecdba fbac eabcdf beadgfc acd efacgd ac agedbf bfdea ecgbd | aecbd agbefd bdgec dgebc
+bfegda bdage gdf gfdae bdfgace fgeb afdec fgdacb gf deagcb | fbaegcd fegb aedgb dfg
+cdaf fd bcdfge agebf dcgfae gfead baedcg gdcea egdbacf dgf | efgab df eagfd afgbe
+egfca egcb ceafdb fbc fbcaeg dgbfa cdfeagb fgcba agdcef cb | cb gcdfae eabgfc fgbca
+gdbca fdecba gdecfb feagbd ceb adfbgec bdgec ec efgdb cfge | ec ecbgd dacefb abfged
+edbcag cabd ecfdgb aegfd eagfcbd ac cga feagcb ebdgc dgeca | acfbdeg dfgea cga dgeca
+ebgacf adcf bcgedfa gdcabe abedf aef edabc fa befgd bfdaec | aefdb af cebad fae
+dageb de gde dgfbce cgdba gabefd afbge cgdebfa aefd ceafbg | efgbda agbdecf bfaegcd edg
+ce dec becf efdgb edfgcb ecbdag gdaefb beafgdc dagfc fecgd | ce fdbage gcdfeba gbcadef
+ecgfa ebadcf ed gcdfab cdefa gfdaeb dbec dbfgace cdbfa dfe | dceb cdfab ed ceagf
+cadg efgcdb gbcfad feabc agfcb afcdgbe dgbfa gcb fagbde gc | gdecbf adfgbc fbcgade gafbc
+gdcefa gefdb bcfeg eabc fagdbc ecagf bcf afcebg cb bfgaedc | fcgdba agbecf fcgeba fgdceab
+afgbc be cbeaf gfeb ebcdfag cfdbag cdfae cfegba cbeagd abe | gdecbaf cagfb bfgaec cabfdge
+eb egdb dcagb abe gcdabe agbce dgabcf fedbca fdcebag gfeca | gdbe agdcb gfcae cgadbf
+dbagc bcaedfg gade cadeb efgabc cabedg gca fgdbc ecafdb ag | dage cagdb dgcaeb cdgab
+gbecd eacdg cgb egacdbf gfdbec efbg bfced bg bdfcea bafgdc | acbfde bg gb gb
+fgbadc fbdag dbecg fbae dacgef ega ae afcbged ebgfad bgaed | ae bacfgd bfea agdbef
+dacfeg gecfd ad gadbfe gadbfec gda acde fcedgb acbfg fdcag | gefcd cdegf agd ad
+caegbd cfdeba edbac cfbegad fe fbea fdagc cef acdef bedgcf | ef cdafgeb fce edfca
+dgcae cedbfag facbdg fdc eacdbf bfegda dfcae fdbae cf cfeb | cf febgcda dfc cdf
+edfag dbeacg dbecafg agc gcefa gc bcfea cdfg fbdgae gefadc | dfacge fagbecd feacbdg bfaged
+abefdg fgdec ecadf efcdab ac dbeaf acdb acf cdegfab gecbfa | fca fdbega decaf cgafdeb
+bceafd fegcad edcagbf dbcage decba bafd df fcd bcfge cbfed | ebgfc eacbdf gadebc df
+egba cgdafbe begfc gacdfb dceaf cefbdg gfa ag gcebaf aecfg | acbgfd gabe fbgeac agfec
+cdgeb fdecag agdbefc gefbac cdaf ade fegdab cgead ad caefg | ecbgdaf dgceb cfgae dea
+cafbde fbgac edcg agdfeb eg dacgef fgcea aefdc dceagfb eag | afgec fbcga ceafgd bgceadf
+cefbg ceabd gd edbacgf aedfbc gaedcb cdbeg abfdcg gdc gead | cgd dgea gd cebad
+fadbg dagecf fea fbecga adce ae bedfcg egacbdf fdgec fdage | dcae caed dbefcg adgfb
+acged aec efgdcb ac fagc abdge abfdegc fdeacg cfaedb gedfc | egbcafd gaefcdb cae cagdfe
+fcbdage bafgec cab fcbae ac abdegf dbfec fbgae eagc cbfadg | acb dafegb acb bfeagdc
+af egfda gebdf gebdfa aefcdbg fbecda fgba daf cdeag dgbcfe | eagdc cefbgda daf daf
+dgebcf gcf agcbd fbecd fbcdg ebacgf aebfcd fdeg fegdabc fg | dacgb dfge fcdbe gedf
+bfacdg gafcb gefbd cd dgcfb dagc bdfagec bceadf fagceb bdc | begfd gbdfe afgcdbe fbeacgd
+bagf afe bdcaeg fdcbe af dafbe cbedgaf gfebad gdaeb aefcdg | baedcgf fa af cgadbef
+acdgf becgfa acd cagbf agcdbe fdba da bdcfag gfdec dcgafeb | bagfc da dca fdbacg
+cdabfe adbfc ecbaf cdae cdbfge dabgfc bfgae bec ce gadcbef | faecbd beadcfg dcae cgfedab
+bceag agd aced gdbafce bcfgae agdeb ad fabdcg fdbge egcbad | gaceb agd bdagec da
+cag dfgbeac ecdbgf ag gfabc ebag fabgec deafgc adcfb fcegb | dgaecf aebg bgea dcbfa
+afdb degbc agedcf da aed beacfg dgfecba efcab bdface cbdea | fbeca aecbd gdecaf ade
+cafebg afedcb gfeabcd fgcb cfa afdeg fc ecgab dacebg cfeag | bcgf bgcae gdfea bgcf
+feg gfcaed cfabdge gf degafb fdegc edfcab edgbc agcf cfade | gf gf gacf egf
+ceadf ecdgf eacbd cebagd dcabfge eaf fdceab fbad fgebca af | cefadb cefad bfad abedc
+gefabd cabdfeg dgceab dagef bdfacg egfdc edgab af feba fda | geadcb dagfceb fda af
+dfcea adgce dfebc gecfdba fadgbe dcefga cfga aebcdg efa fa | fa fae af gaedbf
+agbfd acbgedf faecb cegbad dgabfe gbc fcdg cfagb gc afdbgc | cg cg dfgbae cdfg
+efg bfacg feab efcagd fe bcagedf edgbc ebgcf afbegc bcfgda | dgecfa ef fgcba efba
+aebfdc bcfage dgbacf gface gbaecfd dfgce geab acfbg ea eac | cabfg ea cfagb eagb
+gba gdcea cdbfg acgdb gbecadf bfgecd dgcfab abfc ba fdeagb | ab febagdc dfgbac fdagcb
+dfcb gcebd dfgaec efdgc eagcb dfaebg afedcbg gbd gbcfde bd | gadebfc db febdga bgd
+eabd adcbg ceafg ecb be eacdbg acegb gbfcde adgcbf ecfdgba | cgfebad cbe ebacg dfgceb
+cefbgd cgdfa bagfced dabe fgceab abfeg gdbaef gbfad db gdb | aefdgb bd abdfegc fgabed

2021/src/day08.rs

@@ -1,9 +1,142 @@
+use std::collections::VecDeque;
 use std::io::Read;
 
-pub fn part1(_input: &mut dyn Read) -> String {
-    todo!()
+use crate::common::LineIter;
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+struct Segments([bool; 7]);
+
+impl Segments {
+    pub fn overlap(&self, other: &Segments) -> usize {
+        self.0
+            .iter()
+            .zip(&other.0)
+            .filter(|&(&ours, &theirs)| ours || theirs)
+            .count()
+    }
 }
 
-pub fn part2(_input: &mut dyn Read) -> String {
-    todo!()
+impl FromIterator<char> for Segments {
+    fn from_iter<T: IntoIterator<Item = char>>(iter: T) -> Self {
+        let mut buffer = [false; 7];
+
+        for c in iter {
+            buffer[c as usize - b'a' as usize] = true;
+        }
+
+        Self(buffer)
+    }
+}
+
+pub fn part1(input: &mut dyn Read) -> String {
+    let mut reader = LineIter::new(input);
+
+    let mut total = 0;
+
+    while let Some(line) = reader.next() {
+        total += line
+            .split(' ')
+            .skip_while(|&s| s != "|")
+            .filter(|s| [2, 3, 4, 7].contains(&s.len()))
+            .count();
+    }
+
+    total.to_string()
+}
+
+fn decode(line: &str) -> usize {
+    let mut mapping = [None; 10];
+
+    let mut unmatched: VecDeque<_> = line.split(' ').filter(|&s| s != "|").collect();
+
+    while let Some(digit) = unmatched.pop_front() {
+        let segments: Segments = digit.chars().collect();
+
+        match digit.len() {
+            2 => mapping[1] = Some(segments),
+            3 => mapping[7] = Some(segments),
+            4 => mapping[4] = Some(segments),
+            5 => {
+                // Could be 2, 3, or 5
+                if let Some(one) = mapping[1] {
+                    if segments.overlap(&one) == 5 {
+                        // No lines added, so must be a three
+                        mapping[3] = Some(segments);
+                        continue;
+                    } else if let Some(four) = mapping[4] {
+                        // Should be 6 for 5 and 7 for 2
+                        if segments.overlap(&four) == 6 {
+                            mapping[5] = Some(segments);
+                        } else {
+                            mapping[2] = Some(segments);
+                        }
+                        continue;
+                    }
+                }
+                unmatched.push_back(digit);
+            }
+            6 => {
+                // Could be 0, 6, or 9
+                if let Some(one) = mapping[1] {
+                    if segments.overlap(&one) == 7 {
+                        mapping[6] = Some(segments);
+                        continue;
+                    } else if let Some(four) = mapping[4] {
+                        if segments.overlap(&four) == 6 {
+                            mapping[9] = Some(segments);
+                        } else {
+                            mapping[0] = Some(segments);
+                        }
+                        continue;
+                    }
+                    unmatched.push_back(digit);
+                }
+            }
+            7 => mapping[8] = Some(segments),
+            _ => panic!("Invalid digit: {}", digit),
+        }
+    }
+
+    line.split(' ')
+        .skip_while(|&s| s != "|")
+        .skip(1)
+        .map(|s| {
+            let segments: Segments = s.chars().collect();
+            mapping.iter().position(|s| &Some(segments) == s).unwrap()
+        })
+        .fold(0, |acc, n| acc * 10 + n)
+}
+
+pub fn part2(input: &mut dyn Read) -> String {
+    let mut reader = LineIter::new(input);
+    let mut total = 0;
+
+    while let Some(line) = reader.next() {
+        total += decode(line);
+    }
+
+    total.to_string()
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::test_implementation;
+
+    use super::*;
+
+    const SAMPLE1: &[u8] =
+        &*b"acedgfb cdfbe gcdfa fbcad dab cefabd cdfgeb eafb cagedb ab | cdfeb fcadb cdfeb cdbaf";
+    const SAMPLE2: &[u8] = include_bytes!("samples/08.txt");
+
+    #[test]
+    fn sample_part1() {
+        test_implementation(part1, SAMPLE1, 0);
+        test_implementation(part1, SAMPLE2, 26);
+    }
+
+    #[test]
+    fn sample_part2() {
+        test_implementation(part2, SAMPLE1, 5353);
+        test_implementation(part2, SAMPLE2, 61229);
+    }
 }

2021/src/samples/08.txt

@@ -0,0 +1,10 @@
+be cfbegad cbdgef fgaecd cgeb fdcge agebfd fecdb fabcd edb | fdgacbe cefdb cefbgd gcbe
+edbfga begcd cbg gc gcadebf fbgde acbgfd abcde gfcbed gfec | fcgedb cgb dgebacf gc
+fgaebd cg bdaec gdafb agbcfd gdcbef bgcad gfac gcb cdgabef | cg cg fdcagb cbg
+fbegcd cbd adcefb dageb afcb bc aefdc ecdab fgdeca fcdbega | efabcd cedba gadfec cb
+aecbfdg fbg gf bafeg dbefa fcge gcbea fcaegb dgceab fcbdga | gecf egdcabf bgf bfgea
+fgeab ca afcebg bdacfeg cfaedg gcfdb baec bfadeg bafgc acf | gebdcfa ecba ca fadegcb
+dbcfg fgd bdegcaf fgec aegbdf ecdfab fbedc dacgb gdcebf gf | cefg dcbef fcge gbcadfe
+bdfegc cbegaf gecbf dfcage bdacg ed bedf ced adcbefg gebcd | ed bcgafe cdgba cbgef
+egadfb cdbfeg cegd fecab cgb gbdefca cg fgcdab egfdb bfceg | gbdfcae bgc cg cgb
+gcafb gcf dcaebfg ecagb gf abcdeg gaef cafbge fdbac fegbdc | fgae cfgab fg bagce