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brute force ftw

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This commit is contained in:
Thorn Avery 2020-12-08 20:10:05 +13:00
parent 170d7b09b8
commit a5b64d7a31
4 changed files with 800 additions and 0 deletions
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114
day8.hs Normal file
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{-# LANGUAGE FlexibleContexts #-}
import qualified Data.Vector as V
import Text.Parsec
data Op = Acc Int
| Jmp Int
| Nop Int
deriving Show
main :: IO ()
main = do
raw <- readFile "day8.txt"
let ops = V.fromList $ zip (repeat False)
$ validate $ map (parse lineP []) $ lines raw
ansA = solveA ops
ansB = solveB ops
in do
putStrLn $ "day7a: " ++ (show ansA)
putStrLn $ "day7b: " ++ (show ansB)
solveA :: V.Vector (Bool, Op) -> Int
solveA ops = runMachineA ops 0 0
solveB :: V.Vector (Bool, Op) -> Int
solveB ops = case testSwaps ops 0 of
Nothing -> error "unsolvable?"
Just x -> x
runMachineA :: V.Vector (Bool, Op) -> Int -> Int -> Int
runMachineA ops pc ac = do
let (check,op) = ops V.! pc
in case check of
True -> ac
_ -> do
let nac = case op of
(Acc x) -> ac + x
_ -> ac
npc = case op of
(Jmp y) -> pc + y
_ -> succ pc
nops = ops V.// [(pc, (True, op))]
in runMachineA nops npc nac
swapOp :: V.Vector (Bool, Op) -> Int -> Maybe (V.Vector (Bool, Op))
swapOp ops ind =
case op of
(Acc _) -> Nothing
(Nop x) -> Just $ ops V.// [(ind, (check, Jmp x))]
(Jmp x) -> Just $ ops V.// [(ind, (check, Nop x))]
where
(check,op) = ops V.! ind
testSwaps :: V.Vector (Bool, Op) -> Int -> Maybe Int
testSwaps ops ind
| ind >= V.length ops = Nothing
| otherwise =
case res of
Nothing -> testSwaps ops $ succ ind
(Just nops) -> case (runMachineB nops 0 0) of
Nothing -> testSwaps ops $ succ ind
x -> x
where
res = swapOp ops ind
runMachineB :: V.Vector (Bool, Op) -> Int -> Int -> Maybe Int
runMachineB ops pc ac =
if pc == V.length ops
then Just ac
else do
let (check,op) = ops V.! pc
in case check of
True -> Nothing
_ -> do
let nac = case op of
(Acc x) -> ac + x
_ -> ac
npc = case op of
(Jmp y) -> pc + y
_ -> succ pc
nops = ops V.// [(pc, (True, op))]
in runMachineB nops npc nac
validate :: [Either ParseError Op] -> [Op]
validate [] = []
validate ((Left _):_) = error "invalid input"
validate ((Right b):bs) = b:(validate bs)
lineP :: Parsec String () Op
lineP = do
o <- opP
whitespaces
i <- intP
whitespaces
eof
return $ o i
intP :: Parsec String () Int
intP = do
s <- oneOf ['+','-']
v <- many1 digit
return $ (if s == '-' then -1 else 1) * (read v)
opP :: Parsec String () (Int -> Op)
opP = do
o <- (string "acc") <|> (string "jmp") <|> (string "nop")
case o of
"acc" -> return Acc
"jmp" -> return Jmp
_ -> return Nop
whitespaces :: Parsec String () String
whitespaces = many $ char ' '

626
day8.txt Normal file
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@ -0,0 +1,626 @@
acc +48
nop +308
acc +33
acc +48
jmp +379
acc +27
acc +23
acc +29
acc +3
jmp +326
acc -12
nop +248
nop +146
jmp +293
acc +8
acc -16
acc +18
jmp +255
jmp +390
jmp +442
acc +38
jmp +451
jmp +499
acc +41
acc +44
nop +298
acc +31
jmp +337
acc -3
acc +34
nop +266
acc -19
jmp +281
jmp +232
acc -9
acc +25
acc -8
nop +228
jmp +79
jmp +58
acc +38
nop +318
jmp +17
acc +44
jmp +298
acc -4
jmp +196
jmp +249
acc -9
acc -3
acc +17
jmp +556
jmp +1
acc -15
jmp +166
acc +23
acc +10
acc +39
jmp +475
acc +28
jmp +41
jmp +322
acc +48
acc -11
acc -13
acc +12
jmp +92
jmp +1
acc +9
jmp -26
acc +4
acc -8
nop +484
acc -14
jmp +526
acc -13
acc -2
acc -13
jmp +419
acc +22
acc -17
jmp +1
jmp +151
acc +3
acc +2
acc -13
acc -11
jmp +352
acc +24
jmp -27
nop +206
acc +22
nop +225
jmp +360
acc +48
jmp +105
jmp +80
acc -16
jmp +89
acc +0
jmp +339
acc +37
acc +41
nop +156
jmp +452
jmp +208
nop +60
jmp +155
acc -16
jmp +274
nop -77
acc -16
acc +21
jmp +508
acc -7
acc -1
jmp -83
acc -11
jmp +28
acc +3
acc +32
acc -18
jmp -89
acc +4
acc -14
acc -1
acc +33
jmp -75
nop +185
acc +8
acc +22
acc +26
jmp +164
acc -19
jmp +260
jmp +174
acc +2
acc +34
jmp -120
acc -15
acc +48
jmp +165
acc +5
nop +240
jmp -121
jmp +114
jmp -36
nop +432
jmp +1
acc -18
jmp +429
acc +44
nop +110
jmp +198
acc -18
acc +32
acc +41
jmp +102
nop +177
acc +35
acc +24
acc +46
jmp +121
acc +20
jmp +1
jmp +407
jmp +1
acc +35
acc +46
nop -18
jmp +6
jmp +422
acc -19
jmp -85
acc +33
jmp -116
nop +79
jmp +284
acc +3
acc +49
nop +317
jmp +6
acc +6
jmp +295
nop -141
acc -4
jmp -44
nop +155
acc +48
acc -17
jmp +188
acc +22
jmp +286
nop +103
acc -2
acc +45
jmp +20
acc +21
acc +37
jmp +235
jmp +42
acc -11
nop -15
acc -5
jmp +235
jmp +178
acc +12
acc -15
jmp +25
acc +9
acc +11
nop +389
acc +50
jmp +146
acc +26
jmp +144
acc -14
jmp +304
nop +254
jmp +337
jmp +17
jmp +1
acc +6
acc -4
acc +42
jmp +117
acc +25
acc +50
acc +45
jmp -112
acc +14
acc +27
jmp +347
nop +15
jmp +14
acc +29
jmp +236
jmp -71
acc -11
acc +21
nop +32
jmp -162
acc -15
jmp +322
acc -4
acc +16
jmp +1
jmp +100
jmp +1
jmp -77
acc +21
nop -199
acc +49
acc -1
jmp -231
jmp +230
acc -19
jmp +1
jmp -49
jmp -11
acc +6
jmp -110
jmp +331
acc +44
jmp +292
acc -7
acc -18
acc +50
jmp +221
acc +33
acc +7
jmp -45
jmp +342
acc -19
acc +36
acc +15
jmp -229
nop -5
jmp +57
acc +26
acc +43
nop -175
jmp +82
acc +45
jmp -161
acc -16
acc +35
acc +46
acc +43
jmp +1
nop +195
acc +39
acc +27
acc +32
jmp +227
jmp -272
nop +201
acc +6
acc +13
acc +12
jmp -177
acc -9
acc +46
nop +199
acc -1
jmp +1
jmp +3
acc +42
jmp +75
jmp +305
acc +49
acc -16
jmp -92
acc +3
nop +279
jmp +54
jmp +31
acc +50
jmp -125
acc +21
nop -178
acc +40
jmp +193
acc +39
acc -5
jmp +261
nop -3
acc -13
jmp -310
acc +6
acc -17
acc +12
acc +38
jmp +267
jmp -311
acc -2
jmp -7
nop +77
acc -2
acc +39
acc -16
jmp +10
nop +59
jmp -296
acc -4
acc +41
jmp -249
acc +43
nop +35
jmp +95
jmp +171
acc +10
nop +169
acc -17
jmp +47
acc +49
acc +38
nop +199
jmp +249
jmp -53
nop -194
acc +19
acc +18
jmp -16
acc +33
jmp +194
nop -194
acc +49
jmp +85
acc +50
nop -318
acc -7
jmp -49
acc -6
acc +48
acc -13
acc -14
jmp +67
acc +12
acc +19
acc +3
jmp -371
jmp -149
acc +49
nop -202
jmp -315
acc -6
jmp -171
acc -7
jmp +113
acc +34
acc +36
acc +17
jmp -97
acc +3
jmp -244
acc +25
acc +30
acc +25
acc -19
jmp +44
nop +84
jmp +124
nop +17
acc -11
acc -8
acc +4
jmp +193
jmp -388
acc +36
acc +17
jmp +1
acc -5
jmp +166
acc +39
acc -10
jmp -280
acc +15
jmp +1
jmp -396
jmp +113
acc +37
acc +13
jmp -35
nop +109
acc +8
acc +6
acc +19
jmp +39
jmp +1
jmp +1
acc +39
acc -14
jmp -291
acc +39
acc +31
jmp -231
acc +41
jmp -55
nop -167
jmp +105
acc -8
acc +34
jmp -114
nop +58
jmp +1
nop -270
acc +31
jmp -135
acc +8
acc +33
jmp +1
jmp -64
acc +24
acc +16
jmp +117
acc +35
acc -11
nop +44
acc +18
jmp +1
jmp +88
acc +29
nop +34
jmp +1
nop -118
jmp -404
jmp -144
acc -12
nop -372
acc -14
jmp -209
acc +12
jmp +1
acc -1
jmp +132
nop -93
jmp -130
acc +23
acc +30
acc +3
jmp -209
nop -381
acc -19
jmp +23
nop +87
jmp -277
acc +39
jmp -391
acc +14
acc +18
acc +24
nop -459
jmp -267
acc +35
nop +84
jmp -231
acc +5
acc +0
acc +45
jmp -210
jmp -211
acc +7
acc +8
nop -249
jmp -8
jmp -105
nop -455
acc -19
acc +36
jmp -368
acc +33
acc +10
acc +9
jmp -259
nop +41
acc -14
acc +2
jmp -336
acc +46
jmp -261
nop -284
acc +21
nop -154
jmp -485
jmp -505
acc +32
nop -327
acc +1
nop +43
jmp -23
acc -7
jmp -88
acc +10
jmp -440
acc +12
jmp -430
jmp +1
acc +46
nop -105
jmp -87
acc +49
acc -10
acc -6
jmp -411
jmp -268
acc +35
acc +15
jmp +45
acc -14
acc +0
jmp -234
nop -67
acc +32
acc +1
jmp -476
jmp -297
nop -274
jmp -435
acc +36
acc -2
acc +33
acc +9
jmp -26
jmp +50
acc +23
jmp -172
jmp +1
acc +34
acc +32
acc -4
jmp -312
acc -11
acc +26
jmp -150
acc +41
nop -79
acc +25
jmp -76
acc -2
acc +29
acc +12
jmp -549
nop -357
nop -438
jmp -320
acc +7
acc -6
jmp -149
nop -74
acc +7
acc +45
jmp -383
acc -8
acc +5
acc +12
jmp -463
acc -17
acc +5
jmp -34
jmp +1
acc +18
jmp -523
acc +38
acc +35
nop -222
jmp -424
nop -365
jmp -188
acc +0
acc +7
nop -167
acc +27
jmp -351
acc +26
jmp -201
nop -208
nop -466
acc +50
nop -531
jmp -273
acc +21
acc +25
nop -397
acc +29
jmp +1

43
flake.lock Normal file
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{
"nodes": {
"flake-utils": {
"locked": {
"lastModified": 1605370193,
"narHash": "sha256-YyMTf3URDL/otKdKgtoMChu4vfVL3vCMkRqpGifhUn0=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "5021eac20303a61fafe17224c087f5519baed54d",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"nixpkgs": {
"locked": {
"lastModified": 1607348767,
"narHash": "sha256-3ci3OKIQnYHDoeyCWJbV/H3sScLJewhWeW5qjLHENLQ=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "3a02dc9edb283beb9580c9329f242ad705a721c3",
"type": "github"
},
"original": {
"owner": "NixOS",
"ref": "nixos-20.09",
"repo": "nixpkgs",
"type": "github"
}
},
"root": {
"inputs": {
"flake-utils": "flake-utils",
"nixpkgs": "nixpkgs"
}
}
},
"root": "root",
"version": 7
}

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flake.nix Normal file
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{
description = "ghc with plugins for aoc";
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixos-20.09";
flake-utils.url = "github:numtide/flake-utils";
};
outputs = { self, nixpkgs, flake-utils, ... }:
flake-utils.lib.eachDefaultSystem
(system:
let pkgs = nixpkgs.legacyPackages.${system}; in
{
defaultPackage = pkgs.haskellPackages.ghcWithPackages
(hpkgs: with hpkgs; [
vector
]);
});
}