day 8,9 & 10

This commit is contained in:
Matthieu Bessat 2021-12-10 13:42:11 +01:00
parent f57e712d38
commit d9f6c01f2b
10 changed files with 821 additions and 0 deletions

58
day_10/code.py Normal file
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import fileinput
scores = [
3,
57,
1197,
25137
]
opening_chars = ['(', '[', '{', '<']
closing_chars = [')', ']', '}', '>']
lines = fileinput.input()
score = []
completions = []
completion_points = []
for line in lines:
total = 0
stack = []
line = line.strip()
complete = True
for column, c in enumerate(line):
if c in opening_chars:
stack.append(c)
if c in closing_chars:
i = closing_chars.index(c)
if stack[-1] != opening_chars[i]:
expected_i = opening_chars.index(stack[-1])
# print(line)
# print(''.join(column*[' ']+['^']))
# print(f'Expected {closing_chars[expected_i]} but found {c}')
# print('')
score.append(scores[i])
complete = False
break
stack.pop()
if not complete: continue
# the line is just incomplete
completion = []
while len(stack) > 0:
i = opening_chars.index(stack.pop())
char = closing_chars[i]
total = total*5 + (i+1)
completion.append(char)
completion_points.append(total)
print(''.join(completion))
completion_points.sort()
print('part 1')
print(score)
print(sum(score))
print('part 2')
print(completion_points)
print(completion_points[len(completion_points)//2])

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day_10/example.txt Normal file
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[({(<(())[]>[[{[]{<()<>>
[(()[<>])]({[<{<<[]>>(
{([(<{}[<>[]}>{[]{[(<()>
(((({<>}<{<{<>}{[]{[]{}
[[<[([]))<([[{}[[()]]]
[{[{({}]{}}([{[{{{}}([]
{<[[]]>}<{[{[{[]{()[[[]
[<(<(<(<{}))><([]([]()
<{([([[(<>()){}]>(<<{{
<{([{{}}[<[[[<>{}]]]>[]]

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day_10/input.txt Normal file
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{{[<(<<<([{(({<>()}<[]()>)<({}{})(()<>)>){[([]()]{[]()}][<()()>{()[]}]}}[[(<[][]><{}{}>)]<[{{}()}
{<{<{[[[{[{<([[]()](()<>))>([<[]()>])}<{[[<>[]]<{}()>](<{}()>([]()))}<[{[][]}[<><>]][<()()>]>>
<<{[[<([<(<<([(){}])>(<<[]{}>(<>{})>({[]<>}{{}<>}))>)>]{[<[({<<>()>[()())}{([]())[<>[]]})([<(){}>]<<[][]>{{
{[[[<({{{[{{({<>[]}[()()])[<<>[]>(()<>)]}<{{()()}[()()]}({{}()})>}[{[(<>{}){<><>]]<(()()){{}}>}<{{<>()}[[]
[<{[{[<[{[[({(()<>)}<{[]{}}<()>])<([[]<>][[]<>])(<<>()>{(){}})>]{{(<()[]>[<>{}]){([]{})}}[{{{}{}}(<>{}
[<<<{<<[((({{[{}[]]}}[[<()[]>(<>[])]{({}{})(()[])}]){<{{()()}{{}[]}}<{[]()}>>{<[(){}]><<{}{}><
{[({[[[{<({[((<>[])([]{})){{{}<>}{(){}}}][<[{}{}]<{}()>><{{}()}<<><>]>]})>([[<[<<><>>{{}()}]<[{}
{(<(<{{(<[(((([]{})<{}[]>))(([[]()]{()<>})(({}{}){<>[]})))]{[([{<>{}}{()<>}]<[{}()]<<><>>>
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{<{(<[(<{([<[<[][]>[()[]]]<{<>()}([]())>>]([{<<>{}><{}{}>}[[[]{}]<[]{}>]]{({()[]}){({}())((){})}})){([
<[(((<{{<[[{<(<><>)<<><>>>{{[]<>}<()>}}<(<[]()>{()<>}]{([]<>)[[]{}]}>]](<{{({}<>)[[]()]}[([])]}<[<{
({[[(<{[({<{<[{}()]([]{})>(({}{})(()<>))}<(<{}[]>({}()))[({}<>)]>>}[[([[(){}]([]<>)][(<><>)({}{}}])<{[{}()]}[
[{{[(({[{{({(<()[]>{[]<>})}{[({}())]{<()[]>[{}{}]}})<(([()<>]{()()}){([]{})<[]>}){<<()<>>[<><>]>{<<>{}
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{{<<<[{{<[(({[<>{}][[]()]})({[<>()]<<>[]>}(<{}{}>([]<>))))[[((()())[{}{}])[<[]()>[()<>]]]{[({}{})
(({[({{<([<[{{(){}}<{}[]>}]([({}<>){<>[]}]{({}{})(()())})><{<[{}{}]{[][]}>{[{}{}]{[][]}}}{<[()]<{}{}>>
[{[({<({<<({((<>()))})<{<[[]<>](<><>)>}[{<<>[]>{<>()}}([{}{}]{{}[]})]>>>})>})<[[<[{{(<({<><>}{<><>})<<(){}>>>
{(<<{(<{<[[{<<()[]>{()<>}>}{(<<>()>({}()))}]]>([<[<<{}>[<>{}]>({[]<>}(()[]))]<{{<>()}<{}{}>}
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[{([([[<{[[[<{<>[]}{()()}>((()<>))][{[{}()][[]{}]}]][{{(()<>)([][])}{({}{})(<>())}}(([{}{}]){<
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{<{{[{[{<<<{{([][])[<>]}<{{}<>}(<>())>}[<[()<>](<>[])>[[[][]]{()<>}]]>>>}<[[[{[({}())((){})]{(()()
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import fileinput
import itertools
# key: the digit, value: the number of segments
digit_segment_count = {
0: 6,
1: 2, #
2: 5,
3: 5,
4: 4, #
5: 5,
6: 6,
7: 3, #
8: 7, #
9: 6
}
unique_digit = { # easy digits: 1,4,7,8
2: 1,
4: 4,
3: 7,
7: 8
}
actual_digit = 'abcdefg'
actual_digit_mapping = {
0: 'abcefg',
1: 'cf',
2: 'acdeg',
3: 'acdfg',
4: 'bcdf',
5: 'abdfg',
6: 'abdefg',
7: 'acf',
8: 'abcdefg',
9: 'abcdfg'
}
# ab: digit 1
# dab: digit 7
# eafb: digit 4
# acedgfb: digit 8
def get_keys(d, value):
keys = []
ls = filter(lambda i: i[1] == value, list(d.items()))
ls = map(lambda i: i[0], ls)
return list(ls)
data = []
ex =[]
#ex = ['acedgfb cdfbe gcdfa fbcad dab cefabd cdfgeb eafb cagedb ab | cdfeb fcadb cdfeb cdbaf']
for line in ex+list(fileinput.input()):
content = line.strip()
if content == '': continue
def parse(x):
l = map(str, x.split(' '))
l = filter(lambda x: x != '', l)
return list(l)
ls = list(map(parse, content.split('|')))
data.append((ls[0], ls[1]))
def part_1():
count = 0
for _,output in data:
for x in output:
out = get_keys(digit_segment_count, len(x))
if len(out) == 1:
count += 1
return count
def is_similar(a, b):
return set(list(a)) == set(list(b))
#print(part_1())
def find_by_length(ls, length):
return list(filter(lambda x: len(x) == length, ls))[0]
def diff_str(a, b):
commons = []
longest,shortest = a, b
if len(b) > len(a): longest, shortest = b, a
for e in longest:
if e in shortest:
commons.append(e)
all_d = list(set(a+b))
diff = []
for e in all_d:
if e not in commons:
diff.append(e)
return diff
def remove_char_from_str(subject, char):
return ''.join(list(filter(lambda x: x != char, subject)))
def remove_set(subject, char_set):
return ''.join(list(filter(lambda x: not (x in char_set), subject)))
def remove_char_to_entry(entry, char):
new_entry = []
for e in entry:
new_entry.append(e.replace(char, ''))
return new_entry
# return true
def included_in_str(subject, char_set):
pass
def process_entry(entry):
str_3 = find_by_length(entry, 3)
str_2 = find_by_length(entry, 2)
a = diff_str(str_3, str_2)[0]
cf = str_2
# on récupère le bd à partir du 4
str_4 = find_by_length(entry, 4)
bd = remove_set(str_4, cf)
# enlever a
entry = remove_char_to_entry(entry, a)
# trouver g
# trouver le str_5 qui continent cf et bd
str_5 = list(
filter(
lambda x: included_in_str(x, cf+bd),
find_by_length(entry, 5)
))
print(str_5)
return entry
def digit_with_mapping(mapping, digit):
assert(digit in actual_digit_mapping)
actual = actual_digit_mapping[digit]
encoded = [mapping[actual_digit.index(a)] for i,a in enumerate(actual)]
return ''.join(encoded)
def process_entry_force(entry):
sets = [set(s) for s in entry]
poss = list(itertools.permutations('abcdefg'))
for p in poss:
# we do an hypothesis that poss is the mapping
mapping = ''.join(p)
ok = True
for d in range(10):
s = set(digit_with_mapping(mapping, d))
if not (s in sets):
ok = False
break
if ok:
return mapping
def compute_output(mapping, segments):
def match(w):
i = mapping.index(w)
return actual_digit[i]
a = list(map(match, segments))
a = list(sorted(a))
key = ''.join(a)
d = get_keys(actual_digit_mapping, key)[0]
return d
def part_2():
res = 0
for entry in data:
mapping = process_entry_force(entry[0])
val = int(
''.join([str(compute_output(mapping, d)) for d in entry[1]])
)
print(f'{mapping=} {val=}')
res += val
print(res)
print(part_2())
"""
{dab} = {acf}
{ab} = {cf}
so d = a
using the "unique signal patterns" hypothesis will give:
0,1,2,3,4,5,6,7,8,9
on enlève les digits faciles (1,4,7,8)
1 = cf
4 = bcdf
7 = acf
8 = abcdefg
il reste donc 0,2,3,5,6,9
"""

10
day_8/example.txt Normal file
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@ -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

9
day_8/example1.txt Normal file
View file

@ -0,0 +1,9 @@
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

201
day_8/input.txt Normal file
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@ -0,0 +1,201 @@
eb cbgfae cabdf fedab efb adgcef cbgaefd egdb dbgefa eafgd | dfbae be gdafe gcefab
bfcae acegfd dbfac daf bgfdc dfgaceb gfebdc da dbag cdgbaf | bgfdc dfcba bdegfc efadcg
afgdb dcge ed dfe geafcd aefdcb adgef gfcea gdbecfa agfceb | dfe ceabdf efbcag gefacd
ebad gbfed dfe caefdbg gdbcf fgcdae de fdgabe efbag gabecf | gacfed bgedf dfebgac befga
dabegfc gfeab gdefbc ecagdb bcfd fd ecdgb adgfec bfdge dgf | efbag egbdf ceagfd dfegb
bfadge dbgec fgbdce cafbgde gbe gcbafd cfbe be cgbdf aedcg | bcdeg egacd beg cgedb
aecfgd dabcegf gca dbgacf gc degbaf caged gefc adebc agfed | agc gc cg fdgaebc
beagfc ecf agdecbf cf acfd dgace deafgc efbgd gdfce gadbce | decfbga dbaceg bfgde gdecfa
cgbef dafeg fdc gbadfc cbed aedbcgf cd bfagce fcgde efgcdb | gefcd fgacbd cd bfegdc
bce efdcbg ebgfda cbfgae bdegc ce dfec dbefg cgadb edcfgab | cfaebgd bedgc cfed efcd
gedcfba cfbdg dgecf bafdcg efbgda cbed efd bcfged de afegc | bfcdg agefc fabdgec fegca
fa dgcef gfacd bdgac fcbegd fedcga adef fcgaebd afbgec acf | gefdac egfcbda egfdc gefdca
ebcgf dagbc cfedga cfgba afg agebfc befa dcfgaeb af edbgcf | cbgefd acdgb afdgce fabe
gfe fg fdageb bgfd cagfde abegf baecf daegb cabged cgfdeba | gfe gdafbce fg bgdf
bagdce acfbd faebcgd dae fecdbg ageb ae dbcae defacg gedcb | dea eabg bcdae aecdb
gceaf dagc eda febcagd gebdaf ecafdg deacf ad cdebf abgcef | fdaec fdebc dcfae ade
adebcfg ecd ecbag bgaecf cgdfb afecdb gbedc caedbg aegd ed | bedcag gabecf dcgfb fcabed
fbecda cabgf dg deag cdeagf gdf begcdfa acfed cfagd dcegfb | dg edcfa gefdbc gdea
gfbcad dafbge fdcbea dgbfa dbeag eb eba eadcg bgef edgfcab | agbed degafb eagdb caedg
aegbdc fecdgb eac cgefab fecag abcf ca dbgeafc gebcf fedga | fbgecad abfc cgefba agcef
dc fcda gadbec fabcgde gbcfda dcg befcg deabfg bgdcf fgdba | cdfa acfdebg fgadbe ecfbg
cdbagf gcf badgc fgdac fc cbgead fbcd defga ecagbf gdbafce | gfabdc bdcf gcdab fdcb
cfdabe faedc febcg acbd abf cdagfe ebdgcaf bdgfea ba beafc | fab bafdce dacbfe fab
eag cfedba aecgdfb deafgb agcdb gefc eg gdeafc ecadg cedfa | fedabc gbadc bacdg gecad
fgcae afbdec cad edfab cedfa cdfb bdceag bfdeag fdgecba dc | ecagf dc fdecab cdaef
fcegbd dagefb dbf cgfbd eafcdg dbagc cfdeg gecbafd fb efcb | bf efcgd gdcef gbfedc
dgbcfe dagef fcbadg fdceg efbc edgbfca deabgc ec cbdfg gec | feagd dbafgec fdgcb bdgaecf
fgbcd dagcef fb begfac cbdge bcf gacfd gafbdc gbfadce adfb | bfc bcdgf deagcf fgdbc
gafdbe gefba bf gbdaec faecg bcgfead bgdf efb acfbde gdeba | becagd bf bdfg fb
af agdcfbe aegfbc agdf dfbce acdbf fab edabgc cdabg gdbafc | dagf fa bdfce bfgdca
edfgba edbgf afb beadc gbcdfae dfga afgceb af edbaf gefbcd | efgcba ebagdf dbgfe fa
fecba df dbf dcefgba dgaf aefbd decbgf bcdeag begad deafbg | acbedg degabc fdebcg deabg
cgabedf abd daebgf gbde db bdaefc fecgad cagfb gabdf edfga | gabfc cgbaf beagcdf cafdge
efdgb fbe adcbfe edfbga cafgbde gefdca be eagb gbfdc geafd | eb eabg bega abfgde
cfadg bfeacg gae ecdfga dgcea fabdcg efgbacd aecbd ge fedg | adcgef fdgaec gdface gcfadb
gabd fcdbag cagfbe deafgc dcbaf ad bdefc dca dcbefag bcagf | facdb gceadf dagb bcafg
adc eabfcd ecbgad dfab bedfc edcfa ecafg fecbdg fdaebgc ad | cadebf egcaf gaecf febdc
gfdab cd agcbef cedf ecabdf ebacf febdgca dbcgea fbdca dcb | fabdc fcbdae acebf dc
bagcd gdabfc dcg fgecdb dc dfcbaeg cbage dfgba dcfa dfbega | dc egbfcad gfdba dgc
deb beacd cdbga gbdfce cegfbda abgced be dacfbg agbe cfeda | gfbcad deb ebd cgadeb
efbag gbe gbaefc adbefcg gb bacg efbacd edafg bgdfec abcfe | bacg gfead dfeag dbfgce
gdbfea dacgfb dacbfge fgceb cd afedb efcdba bcfed cdb ecad | gdfacb bdgfea ecgbf ecda
caedbf dcge abgdc gcfbae fcdbgae bcg abcedg bgdfa cg decba | acdgbe cg gbc ecfdabg
adfce bdefga acdgfeb fadeg gecdba gebf bfcagd afg ebdga fg | bdage fg edafbg fgadbe
gfbdec cabdf dca fgca gbcdf ca fbaed cagbdf fagbced eadgcb | ac badecg afbde bcdfeg
gdc agbed adbgc abgfc eabgfcd acfd dc gecfdb cfeagb gcafbd | fdac beadg gcafbd cdabg
cf ecgfadb ecabdg begcaf bfadc fabdgc dbacg cgdf bfade cfb | dafbc cadgb becfdag cbf
fda abgfe gcadbf cdae egfcad bfedcg gcfed ad dfega fgdeacb | cgdef efcbgda fbgdeca eacd
ef ebfcad dceag acgbdf fec bagfedc fbeg ecgdf ebdfcg bfgcd | efcgd bgef fdcgb gfcbd
gadbecf bdgcea fb bafedg bfcdag bdfc aefgc dabgc facgb baf | abf adfebg fba bdagc
afgceb dfcba cdeb gafdecb bcf edfcba bc aedfc fdbga fcaedg | fbedgca efcgda ebacfg deabcf
gefbcad cgfbd cagdf dfa fa gdaefb fabc cefdgb aedgc gbcdfa | deafbg caegd ebfadcg dfa
bfced gdabfc dbeac afgdce fegb dfgcaeb egdbcf fce fe dbfcg | bfdce cdegfa acdegf befdc
edb befcda fabcd ed adbce cfbaegd fbcgad cedf gcaeb agebdf | fegdab bed fgaecdb afdecb
fbea gebdac gbdea fbeagd gdfab fa dfa adfcegb aecfdg bgcdf | faebdg cfbdgea dbcgf adbgf
eac cgabef aebgf cgbde dfebcag efadbc aegbc daefbg facg ca | fcag eabfcg cae cgbde
ce fce gdefb geca dcfeg afdcg gfcdea ecabgdf gbfdac cedafb | gcefd fcdage gdacf gefcd
fbdcgea fabcg ebafg gfecab fge gebc bdfcag debaf eg fgdeca | acgfb bacfg cgbfa gfbea
acdeb gcedba befac bacdgef gfbec fbdeca afc fdceag fa dabf | baegdc gecfb dgfeca bafcdge
dfgbc deagfcb cfga dabgc fagbed cfbgda bfedcg ag abg adceb | gdfceba cgdab dbcea ga
ecafbg ge feg cadef decfabg begd geafd dfgacb gfdaeb gbafd | dacef ge gef faedg
gabecd ecdag edabc fdcbgae ebdafc bcdg gbadef dg cfage edg | cgbade cbgd cgdb edfbgca
beca bgead fbecgd fbagcde cb gbc egfdab dgfac dgbac eabcgd | gaebd dcafg dbgefca abec
bcfea ead cebda fbdcge dgabce gedbc fcdage da dcafebg badg | cbged aegfcd dbag agdb
cefagd gfbedc fagc acedb efc aefbdg afcde fc gafed febgdac | feabdg ceafgd eacfdg feagdc
dbegfa aefdcbg bafecd cd cfaged bfade febdc adcb dcf cfbge | cd badfe dbca bdgfae
dcfa eaf aedgfc aecgbfd efcag fa edabfg fegdbc cgedf agbec | ceagb cfbdeg gabedf fa
db eadgbf dagfc gbefdc egbcaf bdegafc debc fbd bcdgf fegcb | gfcedb ebdc eagbfd ecbd
cb cgbafde dcfegb cdfgae facb bcg degab gefacb caefg cgbea | degba bfgedc egacb egcfa
gbcfd dabgfe abecfgd beagcf cg gcad bgadf fdecb bafdgc gbc | abegdf dagfeb cdebf gcbdf
bfaedc deabgf aecbf fgcba ec bdefacg aedc fcbgde dbafe bce | gfcdbea fbdae bdcaef ec
bedafgc dgcbfa ebc afgcb cfade geba debfcg cgfbea ceabf eb | faedc ebga bega baeg
dfeag acegd cae bgdca gdefab ec cefd cadgefb eadfcg fabcge | faecgb gedaf eca aec
abgf cgebdfa dfcab adcfg cdbgaf bdcefg efcdga dfb bf abecd | gfeadc baecd gcdeaf bfegdc
cbgde egfadc dafec abdf cba ba afgecb bdeac aedbcf adecfbg | eadfc debcg abc ba
ecdfgb adecgf fcged cbef bdceagf bde adgbc cbgde gbfead eb | agdcef dfabge eb cedfag
dgb bg dgfaec efadg bedag afbg bagfdce bfcegd edabc agebfd | befdga dgbea dceab ebadg
cfbe agedb bcg acefg acegfdb bgafec aecbg gafced abgfcd cb | cgbadf adfgcb gfacbed cdeagf
gadfc bag acgdbf abfgce bfgda fedcag dfcegab gb fdeba gdbc | bcfgae febad bg bag
cbaef fgea gabfdc fac cegdba ecabg fdebc ceagfdb af gaefbc | gfcbad dbcage cbaef fca
bace bdcfe bfgedc afb cabdfe ab aegdf befad agecbfd dfcgab | ab cebgfd bace fdgbeac
agfb bgcad edgca becfda cabfgd gefdcb ba cabdgef bcdfg bad | cdabg daceg bda bgfdc
cbefad gcfbade bdcgf edcaf gad acfegd dfeagb ga gcea cdagf | gda ag agd ga
agc adgec ca cgdfe bfdcaeg cdfbge cedfga edagb acbgef facd | abgde bdfcaeg gdabe gca
egcda degcb fabcgde fgaebd be gfdeac ecab bde gfcdb edgbac | dbe afgbde ecab deb
defbga bceg cabgef cadgbef agefb dfgcba becaf dceaf bc cba | gaebf cafeb bc dfacgb
bedag bdfcea dfbacg efdg ebcga abedfcg dg aefbd gbdfae bdg | caebg degbcaf gbcfda efadb
eb bacdf bde bega gdfaec daecg dafcbge acdbge cdabe ecdfgb | agecd eb edb bde
gabcd dcafbe edacgb badce gdcefba fgabc dcbgfe dg dage dgb | dg ceafgdb dfgbec ceadbg
acedb geadcb cafd edf fdcegb dbfae dfcabe fd agfdbce agbfe | adfbe dcbaef dcaf eagfb
dgfb daebcf gaced dab ecgbfad eabfgc db gabedf fgeba agbed | bd bd acedfb fcdbega
daebf befdac gf bdecfag egfb gabefd adfgbc fgeda fgd cdage | agedc fg fdbeac defcab
bcgda egbdac bgf dgbface cagbdf afcb fb ecfdgb edgfa gadbf | fbcegd egcbfd adgfcb dgbaec
de ebcfa dec bacegdf afdbec ecgbaf fcaed cafgd bfde cedabg | cdeagb cfgabde fbed bgedfca
cdgbf cgedbf cdef baceg ef dfbacg bef egbcf dfeagb bafgcde | gbfce fbdcag fcabgd ef
fbac efbdga gebdc fc bfegc bgcfead dfcega baecfg afgeb cgf | adcgbef abcgef fcg bacf
eagdbf de bacfgd abfce dfgab dfabe cfegda bedg fde cebagdf | dfgace cfgdba degb bged
cefabg bcfgd decbg fdcgeab cdbae ceg bgefcd efgd eg cfgdab | bfgdc fbdcga gce adecb
ecgabd ebgd gdc fdaegc dbcaf fcegdab acgeb agdcb eabfgc gd | gdbafec efacbdg bgeafc dfacb
egbfac abg fgeca fgaedc dbfeg cbae acbfgd gefab ba bfcdgea | gab ab efbgca aecbfdg
eadgcfb ge aegbd cedagf dagfb feabcd abcged dbeca cegb egd | debca fadcbe baedg ge
cagfeb edabc gd gfdabe cdfg degcfab bgcfa dgbacf gbcda dgb | gd bfeacg afedgb dbaec
ba bfad febcg decafg fdeac fdgcabe bca abdefc gacbde bcefa | badgce cba eacbf bcafe
ac cedfa bdecgf dgfea fgbdac dfgabce abce edcfb caefbd fac | gafcbd ecfgbd fbgcde faegd
bf eafcd caebg fgcb dcfbaeg abf bfaegd cbeagd baefgc acefb | gdbcefa cbeag fab bfa
gcb ebcgd cfdbaeg dafcge cedfg dgfbce badec begf gb cbgdfa | fgaebdc gbdce gbfe afdcbg
gfbdc dac bdeagf daebcf gecdaf fcgad geca ca gafed fbcdgae | bafcde dgbfc adebcf gcadf
ecbgaf cadefb ec debc bgcdaef ace ecafd egdfba aedbf facgd | ec eca efcagb bfaed
aef fbad ebacg afceb af fedcbg bfced cgadfbe fcbade gaecdf | bgcdef abgce efdbcg aebcg
cafbde ba cabf agfed ecfbd gfebdac dbeagc abe cbgedf fdbae | abe gdaceb eba bea
cbdfg ebg edagf be caegbd cbdgfae fgebd cefb cebgdf cbdgfa | bedgca be fbdcge edabcfg
ebga cbdafg cafgebd eb aedgbf ecfgbd fcaed eafbd bed adgfb | caefd bfdga dcfea cdgabf
efgdbac ab dgcfb abg afedg faeb dbegfa dacegf bdagf dagcbe | fbcgd gacbdfe cdbgf ab
ga dbfca acge edfgab gab agfcb cabfge bfdcge dgfeacb efgcb | ag fbecg ag bfcgea
fdcgbe bad cfbga ceadfb bdeacg bdafc ebdcgaf bcefd da afde | gefdbc daef fade afcdb
dcagbf cbgef abg ab feagd beagcf cfbegd cbae fegab gdbeacf | gba ebgfa ab fecdgb
cdbge aefcdb febca feadgb eagdbfc ecbgf gafc gbf ebacfg fg | gf gefbad gf dbecafg
dgb efdgab becfga aebgc gd cgde cebagd bagcd cebdgaf afbdc | agcbd dg gbd gdec
dcafebg ebdga degc ecgabd bge dfcgab efabgc feadb gadbc ge | badcg acgedb adebf badge
aegbfdc fa fagebd dfeac fae eadcgb edgfc bcfa abefcd bdace | fbca ecdbfa agecdfb dcfae
gbdcea gcfa ecdafbg bagfe bgc ecfdb gecbf fgaedb abfgce cg | dbafge bgaefd edcbf faebg
cfdegab dbgcfa ebf fe fcaeb fecdba cbage abcfd gfbead cefd | fcbea ef fe bceaf
dfebga fde bgfd fd gdcbea cebafd dgabe fegad cdeagfb acfge | fgeca cdeabg gdceab fd
fgeda fcdegb gdbaef dbfcega fad acfeg fgabdc baed da dgfeb | gdefa afd acfge efgbd
daecbg ace abcgfd dcbegfa efcag dafe ae cbegf gfcda agedcf | aedbgc gacef gadfce egfcb
dfacb egdac daecgb ceb be begafc edgb cadebfg edcba egfcad | abcegd cfdbage acbdf aegcfbd
cdfae afgced dbgac fcebad gfdbea badcf fb adcfebg cbef bfd | bafgde begfad bgcda aebfcd
gace eabdgf gcedf gfaedc efbdc edg ge gacbfed dfcga cfgbda | acge eg dfceg gefbad
abdcf bdegfa bgedfca ce geafd dfeagc edc aedfc fegc gacdbe | dcfaeg ecd cde aegfbd
egdbcf agdfbc gacdebf dec gdcfb gebda ec dafebc cgfe dcegb | cfbeadg efgdbc gcebfd ecd
dafge acefg ecgb cfagdb ebfcagd cgfab ec ecf aedcfb acbefg | becg ec gecbaf adfgbec
bad dafgc cgebd efbdcg cbedgfa cgabd bfeagd ab dgecba cbea | edcfabg fadcg dba gfcda
dcefag bcagd ecfag gfacbde fgcaeb cfagb afb efbagd ecfb bf | afdecg ebagdf bcfe fb
aedgcbf dacefg bfgce dgfebc dbcfag fb cefgd gabce bfc fbed | acgdfb bfegc geabc edgfac
df aebdgcf gdcba fcbad cbdage bdcagf deagcf fdbg aefbc afd | cdfba df cebfa daf
edcgf bfeadg bfdea bg gfbed gfba eafcdbg dcfaeb bge degbca | begcda aebfd fbag fedgc
dbfgaec bcf edcb abfeg egfcb fgbdca gcafed bc bfcdge cdfeg | dgefcba cfgbde ecdgf cb
eafg gbdaf gcabd fecbda dgebcaf cdfebg adfgbe bgf gf bdfea | gcadb fage gaef afdceb
debagfc cbdfa gebc cfgaed gc aegfdb cdfebg ebgdf cfg bcdgf | eafbdcg dgfebca deafcg gadefc
adg abced fbega dg abegcf fgde cfegadb gdabe aegfbd gdbacf | abecd afgbce gdabfc dag
efacg fagb ebgdfca dfcabe gcdbea fa fbaceg cegfd geacb fca | edgfc fca fa cgeba
fbadcg caebdg egfbd fdgcb gdbca fbc egdbacf facd fc egcbaf | acdgb egfbca gbceda gfcbd
adfge bfea fb fagbdc bdf edfbag ecdbg fgbed dbgafce ecgadf | dbefg bdegf aegcdf fdeagc
ebgdc afecg dcfgeb gbf cfbd dbaecg bf ecbfg agfdecb dbgfea | afgbcde gefbc fb gcebdf
fga efdab fgdcea bagc fbgcea gfebc abdcegf cbgfde gfbea ga | dgceaf gfa ag cbefg
gead dfaebgc ag fgcead dacef fdecba adgcf fgcbea cga bgdfc | faced fgbcd bgfeac fagcbe
bdfaceg gafbcd cfae daebg gecdf edcag cdegfa cga ecbgdf ac | gdeca agc face ac
dbgcf eg badfe edgbcf gbe aefbgdc eabfcg dgfbac decg fgdeb | cfgbad abdfe eabdf egb
fcbgad gfcadbe eadb bcadf cfedba bce be fecgd cgabef efdcb | fgcabe ebad edba fdcbga
df bedgf bcgedf bcaegd dcgf eacbdf ebcdg dfb agedfcb egfab | dcgf fdb edbgc egdacfb
facdb eca fceagd cfeba dcbe fbcead ec afdbgc acdgbfe begfa | fdeagc ce aec ec
ecfbad gdabefc edb be bceg abdfg dacgef gbaed cedag cebdga | eb adgfb gcade egcb
agedbf cegbda abf eafgc fb debafc gaebf eadfbcg begda bgfd | gacfe aegdb gaecf abdeg
afbced ae efa cdebf ceabf eacgfbd gbafc caed gbefad bedgcf | dbcgfe fae acgbf cfbae
fbeda cfaebg agbdcf gbaecdf dag gfecda gfabc gd bcgd dafgb | dafbecg dfeba dfaeb gfdcba
dacfbe dcbfgae abd ba fdgeb cbfa egadcb edabf fdeca geacdf | gcbdaef dbefa bfac dabfe
cgeafb fdce gafdbc edgca dbacegf efcagd cge baedg gdafc ce | bcfdega ce ec cefd
db eacgdf bgd gcbad afdcebg fcgbed dfab aebgc dfbcga fcagd | agcdf dbg gafcbd fecagd
fdge cgd eadfcb gd gbfdc bcfga cbefadg cfbde deabcg gbcefd | dgfe acfebd fbcdg ecdagb
gcefd fbd db efgdb cbgfea bead cfdbga begfa bfgdeac fgdeba | abcgfd dbf fabge fdb
efgcd ac eafcbd befagc bdcafeg fegba acgb fca gaefc ebafdg | efcag bagc ca gebafd
gb bgd bcdag adecb edbfag cdeagbf cfedab acfdg eagdbc cgeb | dcagb acfgedb dbg dbg
gfdeac gfe fbea bacge bcgafe becgdfa bcgfe ef egcbad fbdcg | bfdgc gcfeba adgceb fge
bcd dc dgfcba eagcdb cbgafed dgbfe dcebg feacbg cdea acbge | gbefd dbgfac gbdafc adce
bd dbegf bgd geadbc fgecd afebg fbagcde bgcfde dbfc eacgdf | bd gdb db gcedf
afdcgb cbeaf bedaf dfbge dab cbdfeag da fdaceb cgebfa deca | egfdb abd fdabce gcfedab
bcdfaeg afbegc dcbae defb cdaeg dfacbe cbe eb fcgabd abcdf | ebc caedb caedg be
dgcfeb dbefg ecfgd bge bafecg fgadce eb cdbe degcfba gadbf | be acegdbf cdgfbe abgfd
ab gfdbae dagfe agdfb bad facgde gfbdc dacfgeb aebg dbfcae | gabe bfgdae caedfb bcgeadf
cfade agfce ebacdf fde cbdfga bcedfg decfbag dacbf adeb de | fbcda ecafd aefdcb faceg
gbefda fdaegcb cbdag eacbd cea cefagd dbface efbc dbeaf ce | edbfa faecdb ebcf gdfceab
fgbead gcdbe ba adfeg bgdae afeb cadgfb bad bcgefda fgedac | cdafbg feagd abdge gcfbade
cbfe daceb decfag dbefca agdeb bc acfed egfbacd bafdgc cdb | dbc dbfaecg decaf gfcdab
eafdgc fcdb gbdae cb cgbad feacgb cgadfeb cdfbga abc fgdca | bafcdg cadfge baegd bfcgda
fabged cfdbea badec abc efadb gacde fdbc cb fbagec eabcgfd | cdaeb cbdea bfaed aebcd
gbc adfebc ecdagfb ecbgda geca eabdc dbgce edbfg gc abdgcf | gc fegadbc agec gc
cdgfb cbedag dcgef gcefad ceg adgebf cdeagfb dfgea acfe ce | cdebga ec dcgef ce
ca gdfba gadcf dfecgb cfadeg eadc afbceg fac dafcgbe decgf | decgf edgfc bgdcafe aecgdf
abdcge cae bfecg efcdba bfeda gcadfeb ac faebc fgbaed fcad | aebfc ca ca aebcf
bcafg cafeb eb feadbg fcgade fcdbea dagecfb ecdb abe dfaec | fcegad cbfgeda bcdaegf fcadeb
becg gfbda gae egfcdab ge deacbf edcfag agcdbe gadeb bcaed | gdabe cegb dcbgae abdce
adfebc fdbcga gecab gfbdae dg cdfg dbg fcadb bacdg gedcabf | egbac dbfaceg gd dg
ebcgfd agdbe fabd efcbga cfbgaed dgb fdgeab efgba db acdge | db cgead bgacdfe cgbefd
dcfbga edbag ae abe fdgbe dgbca aced bfaceg gbacde adfcbge | gefdb cdea cdgba bfdge
dbgcef acef cbe cbfedga decab acefdb fdbcga ce gbaed dbfac | ce fecabd daebc ebcdgf
db dcbaf egcfbad fbdeca ebdc egbfad cbagf bfd ecfagd aefdc | dagfbe cdeb cfbead fabcd
fbagdc gafbc aecbd fbgeac fcabd fdgc afd fd gfbcdea gbeafd | fda eacdb dbegfa dgcf
dgfeab fabcgd fg fgb cagfb dcgf dcabf cdfaeb fdgcbea bcaeg | adfbc dbgfca bcdafg gfb
baegc bd daefgc fadgc gfdb cbd ebacfd cdbgaf dgcabef cgbad | daebfcg fcbaed bd cgfabd
cafbgde cdf fdgae beacd cf adfce cfeg agfcbd fdcaeg gdfaeb | ecdfgba efdca acdbe cdabe
adfceb bg gdbeafc bgafe fcdbeg fegbca gfdae cafeb cbag beg | egafd efdcba gfacbe bcga
fbgda cfgbda fgdeb ebag cedbaf edb eb gafecdb gcefd fgbead | eagb dgbfe decafb adfgb
gefcbd eafdg cdbagef aegfc dg gbfcae dgf aefdb dgac adgcef | dgca feagbc dg agefcd
dbfeca ebcaf cag gafceb gcabefd bfga ga adgcfe ecdgb aecgb | gdbcafe agc cga afbce
ecdbfa cebdgaf efdbga bagfc gacbed cd cdfe dbfca ebdaf dac | daebf ecfd dfec cfed
agcef bf afbced badecg edfgbc efgabdc fegbc cbged fbe bfdg | dgfb fbdeca dagceb gcbed
daefgb cbaeg cegd gea cfbgad bfcea eg fadecbg bedagc abdcg | aeg ge gefdab ge
gfbca bac aebcfd dbcfag gdeacf bc gdafc dgbc ebafg ecbgdfa | cba dgcb cbdg eabfdc
dbegc gacfbd cegfab gabefdc bcgfe ef bfagc feg fdgeab feac | abfdcg afec gdbfea fdgaceb
bfcea cd cde dcfbeag gabed fegdca fdcb abgecf ebdca fabcde | efbac bfeagc cabdfe cfgabe

115
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const readline = require('readline')
const rl = readline.createInterface({
input: process.stdin,
terminal: false
})
lines = []
rl.on('line', (line) => {
let raw = line.replace('\n', '').replace(' ', '')
if (raw.length > 0) {
lines.push(raw)
}
})
rl.on('close', () => {
const db = false
let rows = lines.map(l => l.split('').map(nb => parseInt(nb)))
//console.log(rows)
// first part: find low points
let lowPoints = []
let lowPointsCoord = []
for (let i = 0; i < rows.length; i++) {
for (let j = 0; j < rows[i].length; j++) {
let val = rows[i][j]
let toCmpWith = [[i-1, j], [i, j+1], [i+1, j], [i, j-1]]
let success = true
for (var k = 0; k < toCmpWith.length; k++) {
let [ y,x ] = toCmpWith[k]
if (
y < 0 ||
y >= rows.length ||
x < 0 ||
x >= rows[i].length
) {
// ignore, because these point don't exists
continue
}
// important: you have to use less or equal HERE!
if (rows[y][x] <= val) {
success = false
break
}
}
if (success) {
lowPoints.push(val)
lowPointsCoord.push([i, j])
}
}
}
// second part: find bassins
let findBassin = (alreadySeen, toSee) => {
if (toSee.length == 0) {
return []
}
const e = toSee[0]
const [y,x] = e
// check if the point exists
if (
y < 0 ||
y >= rows.length ||
x < 0 ||
x >= rows[y].length
) {
return findBassin(alreadySeen, toSee.slice(1))
}
// check if it's 9
if (rows[y][x] == 9) {
return findBassin(alreadySeen, toSee.slice(1))
}
// check if it's already seen
if (alreadySeen.filter(([_y, _x]) => _y == y && _x == x).length > 0) {
return findBassin(alreadySeen, toSee.slice(1))
}
neighbours = [[y-1, x], [y, x+1], [y+1, x], [y, x-1]]
res = findBassin([e, ...alreadySeen], [...neighbours, ...(toSee.slice(1))])
return [e, ...res]
}
let bassins = lowPointsCoord.map(c => findBassin([], [c]))
let bassinsSizes = bassins
.map(b => parseInt(b.length))
.sort((a, b) => a - b)
.slice(-3)
bassinsSizesProduct = bassinsSizes.reduce((a, p) => a*p)
let bassinsCoords = bassins.flat()
// output mini map of bassins
if (db) {
for (var i = 0; i < rows.length; i++) {
rowOutput = ''
for (var j = 0; j < rows[i].length; j++) {
if (bassinsCoords.filter(([y, x]) => y == i && x == j).length > 0) {
rowOutput += '\033[1m' + rows[i][j] + '\033[0m'
} else {
rowOutput += rows[i][j]
}
}
console.log(rowOutput)
}
}
let risks = lowPoints.map(height => 1+height)
let sum = risks.reduce((e, s) => e+s)
console.log(`Sum of the risk level of low points: ${sum}`)
console.log(`Product of 3 largest bassins size: ${bassinsSizesProduct}`)
})

5
day_9/example.txt Normal file
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@ -0,0 +1,5 @@
2199943210
3987894921
9856789892
8767896789
9899965678

101
day_9/input.txt Normal file
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@ -0,0 +1,101 @@
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