diff --git a/2021/08/08.py b/2021/08/08.py new file mode 100644 index 0000000..f767fa6 --- /dev/null +++ b/2021/08/08.py @@ -0,0 +1,83 @@ +displays = [] +with open("input.txt") as f: + displays = [ + [patterns, output] + for line in f.read().split('\n') + for patterns, output in [line.split(' | ')] + ] + +part1 = 0 +for display in displays: + _, output = display + for signal in output.split(' '): + if len(signal) in [2, 4, 3, 7]: # "1", "4", "7", and "8" are unique + part1 += 1 +print(part1) + +part2 = 0 +for display in displays: + patterns, output = display + patterns = patterns.split(' ') + output = output.split(' ') + # we're going to use set theory. some digits are ambigous... + ZERO_SIX_OR_NINE = set() + TWO_THREE_OR_FIVE = set() + # preliminary sorting based on known lengths + for pattern in patterns: + if len(pattern) == 2: + ONE = set(pattern) + elif len(pattern) == 4: + FOUR = set(pattern) + elif len(pattern) == 3: + SEVEN = set(pattern) + elif len(pattern) == 7: + EIGHT = set(pattern) + elif len(pattern) == 6: + ZERO_SIX_OR_NINE.add(pattern) + elif len(pattern) == 5: + TWO_THREE_OR_FIVE.add(pattern) + # do some set geometry to figure out the ambiguous digits + for pattern in ZERO_SIX_OR_NINE: + if (set(pattern) | ONE ) == EIGHT: + SIX = set(pattern) + ZERO_OR_NINE = {p for p in ZERO_SIX_OR_NINE if p != pattern} + R1 = EIGHT - SIX + R2 = ONE - R1 + for pattern in TWO_THREE_OR_FIVE: + if ONE.issubset(set(pattern)): + THREE = set(pattern) + elif R1.issubset(set(pattern)): + TWO = set(pattern) + elif R2.issubset(set(pattern)): + FIVE = set(pattern) + for pattern in ZERO_OR_NINE: + if FOUR.issubset(set(pattern)): + NINE = set(pattern) + else: + ZERO = set(pattern) + # now that we've decoded our digit patterns, convert the output and sum up. + number = '' + for digit in output: + digit = set(digit) + if digit == ZERO: + number += '0' + elif digit == ONE: + number += '1' + elif digit == TWO: + number += '2' + elif digit == THREE: + number += '3' + elif digit == FOUR: + number += '4' + elif digit == FIVE: + number += '5' + elif digit == SIX: + number += '6' + elif digit == SEVEN: + number += '7' + elif digit == EIGHT: + number += '8' + elif digit == NINE: + number += '9' + part2 += int(number) +print(part2) \ No newline at end of file diff --git a/2021/08/input.txt b/2021/08/input.txt new file mode 100644 index 0000000..c0ea57b --- /dev/null +++ b/2021/08/input.txt @@ -0,0 +1,200 @@ +dcbgefa cebd bfega eadbf db cdfaeb dba bfcgda egadcf aedcf | egadcfb eafcd db debc +dfea ea abe dfgaeb fdcgba badeg dcfbeag dbgaf bcged fcebag | gfadb dfagb fdgabe eagdbf +cd gfcde cdbfage cbdfae edc fedgac gadc feagd febdga gbfec | adbfeg dbfcae facbde gcfde +ecafb abgfc deacbgf fe fbe fgec edgafb cgbafd ebfgca ebcad | cfbae fbcga dfabceg ceabf +eagfcd abfdecg fe fdae egf cfgda gcedb dcgabf bcegaf cegdf | gcfda feg efg cadgbf +gfcdab efadc cadbgfe beca badfce ecfbd edcagf gbdef cfb bc | gdecbfa cbea gedbf aceb +cgafb abgcde debfca ecafgd ecdag bcd dacbgfe gebd 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baecgd gacfbe bf cfagb +bgefca agcbf dfgceab bcedfa ebafg fdgae feb dcgabf gebc be | agbfe be becfga gcbafe +cbgaed gb dgb defcg gdfeb ecafgd dbgfce bcfg facegbd deabf | gdcef adgbec egdfb acgefd +bcead bdecag adbfec gda gabe febgcda ag caedg gabdfc efcdg | ebag ageb cedafb edbca +bg cdbga ebcg adgfeb dagbefc dbg caedg cgfdae acfdb geadbc | cabdf gbce bacdeg dabegf +fecdgab bd gfcade agedf cafbg cagdbe adbgf gbd efbgad efbd | egafdc gfdea bfaedcg gabedc +cfdgbe cgaeb edab gacde ebg be edcagbf edcgaf abfcg adcgbe | gafbc gcbaf adgbec be +geb bdfg abced fdbaeg gdafe gfdecba bg gcedaf bdage ebfgca | cgefda egdbaf gdcfae eagdb +cafbge cfdgb abfce aedfbg cade de beafcgd cdbef dbcfae def | dfbaec cfdbe gcaefb dgbfc +bafce bcage ebcagfd fc decbfa bdcf fdaeb acdegf efc egbadf | aefbd abegc eabdf bfdea +gc dfeacg ebfacdg ebcdfa bdfac gbcda fbcg dafbcg cag bdega | dcabfe cbfg fabdc gcfb +fdaeb agbfe ecadbg efdacgb dbf debac cdaf dgcfbe dacbfe fd | abdfe gfeab fdac dfb +cbfdg adgcb gfebc gedabc 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eafgb efg ef acfe | cgfaeb ceaf dbcgea gfbae +cfdae cefg acf bcaedg aecdg eadbgfc fc dbafe bfadgc defcag | efgc cfa ceadbg cfa +egc bgadef fcbdg cgdfe cdafge ce gadebc begcdfa faedg efca | efadg cdeafg cgfdb faegdb +ed agdbc bedcg cfageb edfb fgbdec ged dfaceg aedcgfb gfceb | de debf agdcb fdgaec +beadgfc bc fabc cbeda dbefa cfbead ecfgbd cbe dgeca ebagfd | dceba edcafb cadgbfe daceb +dgbcef afdbc fgdaeb ef edf edcgb eabcdg gbacfde cefg cfedb | ebfcd gbfedc bafcd ef +fecgb gbcfad aebdgc cgbaf cfedag gbcad afg fa afdb cafedgb | afdcge gdbacf acgdb gcdaeb +abd cfeadbg agedbf ba fdaeb fbga fcdae dabgce fcebdg edfbg | dfegcb dcebgf befdcg bfade +gbacfed gdbce gdaec fcedag eb cgfdb adbe ecb eadgcb fegcba | acebdg egbfac dcafge fbdgc +fbea fa acgbdf bdcgfe deacg daf fbged ceagbfd fgade gedfab | bcgfaed af af dfa +fedbgc dfgea gbdefa bagd egacbdf bceaf aegbf gb ecdgaf bgf | bg caedfg aefgdbc bfg +dabcgfe dbfce cgeda adcbe bgaced eab gadb fdgcea ba bcefga | cdbae ba cfaedg cdaeg +bed bagedc 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gfbec | egcdb dabc dabcge edb +cgdab efabdgc bae bacefg efgbc fcea fbcdeg bgeac ea aebfgd | ae cbgae dbfeag fcegb +acfed eg dgae fbceda gce dgface ebafgc fgdcb cedgf fdgcbea | fbcdg fdcaeb caegdfb cgabfe +dcgab cae ae eabgc gedfca defcgb fedacbg efbgc bfea eacgbf | cgdab ebaf bdcgfe eac +gafbced ceadfg gabfc ae cgbfae febcd cefba cfgadb bgea ace | fbdce eca bgafc afgdcb +bgd edfab acgfbd dg gdac dbfga bcgfa gdbcafe bdcefg ebfgca | abedf dafgb abgfce fagbec +adbegf bgace gdfae afc fbcaed gcdf cf faecgdb gaefc cdaefg | cfa ceafg abdcfe agefdb +fdgcb adg cbefdg cbfadg adgcb dcfage ga cgbfdea bfag aedbc | gdfcea fecdgb acbgd bgdfc +febgdc gb fbecd fbg cgeabf agfed bdfeg bedcaf fcgdaeb gdcb | febgd cfabed cedbf bdfge +dbgcf dfg dgcafb bdcag df efdacg dcabeg facegdb adfb gbfce | fgcdb dcfgb agbdcef gbcef +abfdcg gbfea ceabgdf gedcbf ec bec cgfdb bgfce ecdf acgebd | cagdfb ebc dfgceb ce +bdafc fbaeg dcagfb cgdb adg dg daefbc bdgaf dacfebg efadcg | dbgc bcfad aegfb adbcf +cdagfe cdegb dbe defcg gabec gfdcbae bd efbdgc bcadfe dbfg | eacfgd db db dbe +fbcegd bdfgc cf gbecafd gdcba fbc fgdeb cdef gadbfe acbefg | gdbfe gadfeb dbgfc bdfgec +abcegf cbfad eb fabcedg efabc ceb gfbe degafc gfeac abgced | agbcde ceb gfbe beacf +fgdc gbf fgcbda cefbga facdb gadbe gf bafdec gbdfa aebgfcd | fbg gdcbaf efcbad fgaecbd +ecadbf dcfbga bcdgeaf afgc adgcb bcf fbgde cf dgbaec cbfdg | eafbcd cf abcdgf dfebg +beafg edfgba fbacgd fcbeg ebcagd bdagf ea bae efad cgbfdea | afebcgd cfgbad efcbg bgdeaf +faegcb gefdb gdefcb dfcga dbfga fgadcbe ba bfeadg adeb abf | bfagd fgbedc ebfdg gfcdbae +adebc gacdeb gba aegbd cgefba ebfgdac acfdeb agdc ga bfdeg | ecadb dbefg fbgcae gcdafeb +gf dfbgec cdbef dgfb gcebdaf efbgc aefdcg bdaecf gef caebg | cdafgbe gfe cgbfade fbcge +cba ebfga ac agbdfec becgd cabdeg fdebgc daec gfbdac bagec | ca ebgcd ecbdgf fgdbce +gcafeb dbceg edga bcgdaef de bcfaed ced abecgd becga dcbgf | agbcfe aedg ed aegbcf +cbeg bcafg bgdaf ecgfba agc beafc ceagdbf cdegfa cg dfecab | gebc debcagf cg gc +dbaecgf gacbf gce bcedag bcgef dfceb ge efbdac degf dcfgbe | ecg defg ecfgb bfecd +ga gfceab bgdeafc acdbf bgcfe cbedga fgae bafcg fecbgd gba | acgfb ebadcg fcbad bcagf +cadb edbagf gdcbfa dgc cdfga adfbceg fagbd fgeca dcbegf cd | gbfedc cdebfag debfcg fagbd +fbcgea bacgedf gbce cdfagb eba be gbcfa egdabf cbafe acefd | eacbfg abe cegfba ecgb +bfcag gdba ba adfegbc eafbdc bfcdg ecagf bac fbgcad gcdfbe | bgadcf ebgcfd acb gbfced +ced geabcd dcaebgf fgaecb begac cadb cd cgdefa bdgec dfbeg | beacdg bdaceg fgcaedb cbeagd +gdacfb bfdgc gfaec ebfdcag fegbc cfgedb acdfeb gedb be cbe | bgfec be gbed egcaf +efcda abf gfdaeb gedcbfa abcdg bf bcdfa cfeb eagfdc caefbd | gabdc fecdag bgdfeca bdegaf +efcab gefcadb dcbge cagebd gfdb feacgd efd bdcefg df befdc | fbdce acfeb cdebg fd +gafbecd dacg efgbd dcfge ecdaf gcf cedfag febcga cg dbcefa | fdaebc gc afgceb gecfba +ebgcd fgba dbcgaf cgbad gac gdbceaf cfdba cgaedf afdceb ag | abgdfec cegdb cag fbag +ecbgf efac bgade bacedgf begca agbcef gbfedc agc fcabdg ac | aefc fbcadg afbcgd dgcaefb +fab cafgbe face acgbedf eagbc bdgafe egcabd fbgca gdbcf fa | cfbgdea acbge cagbe fcea +fedac ec gced bacgfe acdbf begadf gedbfac cae fdaeg cgdaef | dfcgea dafge aefgdb fadge +gbcade fe afbgc cedfga bdfe gbfae fae fdbega dgbae cdbagef | egabf aef abgef efbd +fagebc fad dcfab acdbfge ceabf egadbf edfc dbafec fd gdbca | bafec dbgafe fd eafcb +afg ecdbag fcage dbgefa abefc gfdc fgcbdae fg fdecga gdeca | deacg fagdce cefag edfgca +badfc gcfdea db fedcgb abde bcd fdecgab deafc facedb fgabc | fbcgde abgcf gabfc aedgcf +bdaefc daecb gfcad aebg edgbac gbfcde bg cbadfeg gcb dbcga | bega cfabed cedba bgae +afdbec ge aeg cdagb egfb cebadfg egbda agfdeb facdge efbad | fdbeac agbdc ega cagdb +cfe eagfd bacfg egdfba edac gefca gecdafb eacdgf egcdfb ce | cfgbde fbgca efdbga daec +abfcg bdcegaf ecbfg bafecd gcda dfcab cagfbd edgabf ga gab | dacg gacd gacd bfgca +egbac ec cbdgfa ceb agdcb bagedc cdbaefg gbaef fcbade decg | dfacbg bafge ce efbag +bd bdafce gcdfe fdcbg bfgca dfbceg dbf gecfda dgbcfea gdbe | edfcg fcdge fbcgde gcedf +eafcbdg eagbc gcaebd cfegab dfeca bgfedc cfb befac bfga bf | bgdace bacfe fb feagbc +bgedfc bgafedc adc bafec gcdeba egbcd dbeca gcafbd gead da | gdefcb gecdab cbfged gcbde +bgec eb fbgea aeb ecagf dabgf cdfage bfdcae cebgdfa fabceg | cgadef begacf afgbe egcfdab +fe fdecabg ebcfa bgcaf ebcgfa aebdc begf fcedga fdcbag aef | bacde fae fegb efa +gdefbac dgfecb afdg gcfbad gcd ecabg gd afcdb bfdcea gdcab | acdgb dg dcg dafg +bcaefd aceb dagecf ea cgebafd eda ebgdf faedb dbafc bgdcaf | facbdg aecb aebc gdefb +cafdeg egcfb ge afedcb egba acgfbe cebadfg gbfdc baefc egc | ebga ge ecg aecfb \ No newline at end of file diff --git a/2021/08/sample.txt b/2021/08/sample.txt new file mode 100644 index 0000000..8614893 --- /dev/null +++ b/2021/08/sample.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 \ No newline at end of file