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January 7, 2018 20:09
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Advent of Code 2017
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module part1 = | |
let captcha (input:string) = | |
let len = input.Length | |
let circular i = i % len | |
input | |
|> Seq.toArray | |
|> Array.fold (fun (index,count) x -> | |
index + 1, | |
if x = input.[circular (index + 1)] | |
then count + (int x - int '0') | |
else count | |
) (0,0) | |
|> snd | |
captcha "1122" = 3 | |
captcha "1111" = 4 | |
captcha "1234" = 0 | |
captcha "91212129" = 9 | |
captcha "8231753674683997878179259195565332579493378483264978184143341284379682788518559178822225126625428318115396632681141871952894291898364781898929292614792884883249356728741993224889167928232261325123447569829932951268292953928766755779761837993812528527484487298117739869189415599461746944992651752768158611996715467871381527675219481185217357632445748912726487669881876129192932995282777848496561259839781188719233951619188388532698519298142112853776942545211859134185231768952888462471642851588368445761489225786919778983848113833773768236969923939838755997989537648222217996381757542964844337285428654375499359997792679256881378967852376848812795761118139288152799921176874256377615952758268844139579622754965461884862647423491918913628848748756595463191585555385849335742224855473769411212376446591654846168189278959857681336724221434846946124915271196433144335482787432683848594487648477532498952572515118864475621828118274911298396748213136426357769991314661642612786847135485969889237193822718111269561741563479116832364485724716242176288642371849569664594194674763319687735723517614962575592111286177553435651952853878775431234327919595595658641534765455489561934548474291254387229751472883423413196845162752716925199866591883313638846474321161569892518574346226751366315311145777448781862222126923449311838564685882695889397531413937666673233451216968414288135984394249684886554812761191289485457945866524228415191549168557957633386991931186773843869999284468773866221976873998168818944399661463963658784821796272987155278195355579386768156718813624559264574836134419725187881514665834441359644955768658663278765363789664721736533517774292478192143934318399418188298753351815388561359528533778996296279366394386455544446922653976725113889842749182361253582433319351193862788433113852782596161148992233558144692913791714859516653421917841295749163469751479835492713392861519993791967927773114713888458982796514977717987598165486967786989991998142488631168697963816156374216224386193941566358543266646516247854435356941566492841213424915682394928959116411457967897614457497279472661229548612777155998358618945222326558176486944695689777438164612198225816646583996426313832539918" | |
module part2 = | |
let captcha (input:string) = | |
let len = input.Length | |
let half = len / 2 | |
let circular i = (i + half) % len | |
input | |
|> Seq.toArray | |
|> Array.fold (fun (index,count) x -> | |
index + 1, | |
if x = input.[circular index] | |
then count + (int x - int '0') | |
else count | |
) (0,0) | |
|> snd | |
captcha "1212" = 6 | |
captcha "1221" = 0 | |
captcha "123425" = 4 | |
captcha "123123" = 12 | |
captcha "12131415" = 4 | |
captcha "8231753674683997878179259195565332579493378483264978184143341284379682788518559178822225126625428318115396632681141871952894291898364781898929292614792884883249356728741993224889167928232261325123447569829932951268292953928766755779761837993812528527484487298117739869189415599461746944992651752768158611996715467871381527675219481185217357632445748912726487669881876129192932995282777848496561259839781188719233951619188388532698519298142112853776942545211859134185231768952888462471642851588368445761489225786919778983848113833773768236969923939838755997989537648222217996381757542964844337285428654375499359997792679256881378967852376848812795761118139288152799921176874256377615952758268844139579622754965461884862647423491918913628848748756595463191585555385849335742224855473769411212376446591654846168189278959857681336724221434846946124915271196433144335482787432683848594487648477532498952572515118864475621828118274911298396748213136426357769991314661642612786847135485969889237193822718111269561741563479116832364485724716242176288642371849569664594194674763319687735723517614962575592111286177553435651952853878775431234327919595595658641534765455489561934548474291254387229751472883423413196845162752716925199866591883313638846474321161569892518574346226751366315311145777448781862222126923449311838564685882695889397531413937666673233451216968414288135984394249684886554812761191289485457945866524228415191549168557957633386991931186773843869999284468773866221976873998168818944399661463963658784821796272987155278195355579386768156718813624559264574836134419725187881514665834441359644955768658663278765363789664721736533517774292478192143934318399418188298753351815388561359528533778996296279366394386455544446922653976725113889842749182361253582433319351193862788433113852782596161148992233558144692913791714859516653421917841295749163469751479835492713392861519993791967927773114713888458982796514977717987598165486967786989991998142488631168697963816156374216224386193941566358543266646516247854435356941566492841213424915682394928959116411457967897614457497279472661229548612777155998358618945222326558176486944695689777438164612198225816646583996426313832539918" | |
module Day2 = | |
open System | |
open System.IO | |
File.ReadAllText (__SOURCE_DIRECTORY__ + "/Day2Data") |> Seq.map (fun x -> sprintf " %i" (int x)) |> Seq.toArray | |
let checkrow (row:string) = | |
let values = | |
row.Split (char 9) | |
|> Seq.map (fun x -> int x - int '0') | |
let min = Seq.min values | |
let max = Seq.max values | |
max - min | |
let checksum (data:string) = | |
data.Split (char 13) |> Seq.sumBy checkrow | |
let test = "5 1 9 5 | |
7 5 3 | |
2 4 6 8" | |
test |> checksum | |
let challenge = "414 382 1515 319 83 1327 116 391 101 749 1388 1046 1427 105 1341 1590 | |
960 930 192 147 932 621 1139 198 865 820 597 165 232 417 19 183 | |
3379 987 190 3844 1245 1503 3151 3349 2844 4033 175 3625 3565 179 3938 184 | |
116 51 32 155 102 92 65 42 48 91 74 69 52 89 20 143 | |
221 781 819 121 821 839 95 117 626 127 559 803 779 543 44 369 | |
199 2556 93 1101 122 124 2714 625 2432 1839 2700 2636 118 2306 1616 2799 | |
56 804 52 881 1409 47 246 1368 1371 583 49 1352 976 400 1276 1240 | |
1189 73 148 1089 93 76 3205 3440 3627 92 853 95 3314 3551 2929 3626 | |
702 169 492 167 712 488 357 414 187 278 87 150 19 818 178 686 | |
140 2220 1961 1014 2204 2173 1513 2225 443 123 148 580 833 1473 137 245 | |
662 213 1234 199 1353 1358 1408 235 917 1395 1347 194 565 179 768 650 | |
119 137 1908 1324 1085 661 1557 1661 1828 1865 432 110 658 821 1740 145 | |
1594 222 4140 963 209 2782 180 2591 4390 244 4328 3748 4535 192 157 3817 | |
334 275 395 128 347 118 353 281 430 156 312 386 160 194 63 141 | |
146 1116 153 815 2212 2070 599 3018 2640 47 125 2292 165 2348 2694 184 | |
1704 2194 1753 146 2063 1668 1280 615 163 190 2269 1856 150 158 2250 2459" | |
File.ReadAllText (__SOURCE_DIRECTORY__ + "/Day2Data") |> checksum | |
module Day3 = | |
open System | |
open System.IO | |
File.ReadAllText (__SOURCE_DIRECTORY__ + "/Day2Data") |> Seq.map (fun x -> sprintf " %i" (int x)) |> Seq.toArray | |
let checkrow (row:string) = | |
let values = | |
row.Split (char 9) | |
|> Seq.map (fun x -> int x - int '0') | |
let min = Seq.min values | |
let max = Seq.max values | |
max - min | |
let checksum (data:string) = | |
data.Split (char 13) |> Seq.sumBy checkrow | |
let test = "5 1 9 5 | |
7 5 3 | |
2 4 6 8" | |
test |> checksum | |
let challenge = "414 382 1515 319 83 1327 116 391 101 749 1388 1046 1427 105 1341 1590 | |
960 930 192 147 932 621 1139 198 865 820 597 165 232 417 19 183 | |
3379 987 190 3844 1245 1503 3151 3349 2844 4033 175 3625 3565 179 3938 184 | |
116 51 32 155 102 92 65 42 48 91 74 69 52 89 20 143 | |
221 781 819 121 821 839 95 117 626 127 559 803 779 543 44 369 | |
199 2556 93 1101 122 124 2714 625 2432 1839 2700 2636 118 2306 1616 2799 | |
56 804 52 881 1409 47 246 1368 1371 583 49 1352 976 400 1276 1240 | |
1189 73 148 1089 93 76 3205 3440 3627 92 853 95 3314 3551 2929 3626 | |
702 169 492 167 712 488 357 414 187 278 87 150 19 818 178 686 | |
140 2220 1961 1014 2204 2173 1513 2225 443 123 148 580 833 1473 137 245 | |
662 213 1234 199 1353 1358 1408 235 917 1395 1347 194 565 179 768 650 | |
119 137 1908 1324 1085 661 1557 1661 1828 1865 432 110 658 821 1740 145 | |
1594 222 4140 963 209 2782 180 2591 4390 244 4328 3748 4535 192 157 3817 | |
334 275 395 128 347 118 353 281 430 156 312 386 160 194 63 141 | |
146 1116 153 815 2212 2070 599 3018 2640 47 125 2292 165 2348 2694 184 | |
1704 2194 1753 146 2063 1668 1280 615 163 190 2269 1856 150 158 2250 2459" | |
File.ReadAllText (__SOURCE_DIRECTORY__ + "/Day2Data") |> checksum | |
module Day4 = | |
open System | |
open System.IO | |
let data = | |
File.ReadAllLines "Day04Data" | |
|> Array.map (fun line -> line.Split ' ') | |
|> Array.filter (fun line -> line.Length = (set line |> Set.count)) | |
|> Array.length | |
module Day5 = | |
type State = | |
{ | |
Position:int | |
Instructions:int[] | |
} | |
let move (state:State) = | |
let step = state.Instructions.[state.Position] | |
let inst = state.Instructions |> Array.copy | |
inst.[state.Position] <- step + 1 | |
let pos = state.Position + step | |
{ Position = pos; Instructions = inst } | |
let init = { | |
Position = 0 | |
Instructions = [| 0;3;0;1;-3 |] | |
} | |
let rec solve count state = | |
if state.Position >= state.Instructions.Length | |
then count | |
else | |
solve (count + 1) (move state) | |
solve 0 init | |
open System | |
open System.IO | |
let problem = File.ReadAllLines "Day05Data" |> Array.map int | |
solve 0 { Position = 0; Instructions = problem } |
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