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Day 7: Shuffle around a bit

This commit is contained in:
shu 2019-12-07 22:45:18 +01:00
parent a627f553bb
commit fa612e9eb6
1 changed files with 7 additions and 11 deletions
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18
2019/day7/day7.hs
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@ -3,16 +3,19 @@ import qualified Data.List as L
import Data.Vector as V
import Data.Char
data OutAction = Continue | Output | Halt deriving (Enum, Eq, Show)
type Tape = Vector Int
type TapeSection = Vector Int
type TuringMachine = (Tape,Int)
main = do
content <- readFile "input"
let tape = fromList $ L.concatMap (L.map read . splitOn ",") (lines content)
print $ find_max tape [0..4]
print $ find_max tape [5..9]
data OutAction = Continue | Output | Halt deriving (Enum, Eq, Show)
type Tape = Vector Int
type TapeSection = Vector Int
type TuringMachine = (Tape,Int)
find_max :: Tape -> [Int] -> Int
find_max tape range = L.maximum [run_amps_feedback tape xs | xs <- L.permutations range]
run_amps_feedback :: Tape -> [Int] -> Int
run_amps_feedback tape intseq = L.head $ run_amps_feedback' tms intseq [0]
@ -26,9 +29,6 @@ run_amps_feedback' ((t,p):tms) intseq prev =
tailseq = if L.null intseq then [] else L.tail intseq
xprev = if L.null intseq then prev else (L.head intseq):prev
find_max :: Tape -> [Int] -> Int
find_max tape range = L.maximum [run_amps_feedback tape xs | xs <- L.permutations range]
opl :: Int -> Int
opl x
| n`L.elem`"1278"=4
@ -51,7 +51,6 @@ getopmodes opvec = (op_dedup,parsed_modes)
parsed_modes = parsemodes $ L.reverse modes
op_dedup = if L.last op == '0' then [L.head op] else op
step :: TapeSection -> (TuringMachine, [Int], [Int]) -> (TuringMachine, OutAction, [Int], [Int])
step opvec ((t,p),input,val)
| op=="1" = (tm_binop (+),Continue,input,val)
@ -70,7 +69,6 @@ step opvec ((t,p),input,val)
tm_binop x = new_tm t ((params ! 0) `x` (params ! 1))
new_tm t x = ((t // [((V.last opvec), x)]),p)
exec_steps :: (TuringMachine, [Int], [Int], OutAction) -> (TuringMachine, [Int], [Int], OutAction)
exec_steps ((t,p),input,output,halt) =
let command_length = opl $ t ! p
@ -79,5 +77,3 @@ exec_steps ((t,p),input,output,halt) =
step opvec ((t,p+command_length),input,output) in
if cond `L.elem` [Output, Halt] then ((t_new,p_new),input_new,output_new,cond)
else exec_steps ((t_new,p_new),input_new,output_new,cond)