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問題文
(main :: io ())
main :: IO ()
(import qualified)
import qualified
(mapm)
mapM
(foldl)
foldl
(import prelude hiding)
import Prelude hiding
(putstrln)
putStrLn
(do)
do
(mapaccuml)
mapAccumL
(read)
read
(liftm)
liftM
(form_)
forM_
(map)
map
(zip)
zip
(hputstr)
hPutStr
(deriving (eq, show))
deriving (Eq, Show)
(return)
return
(where)
where
(let)
let
(case)
case
(just)
Just
(nothing)
Nothing
(true)
True
(false)
False
([1..])
[1..]
(runst)
runST
(runstate)
runState
(execstate)
execState
(put)
put
(get)
get
(modify)
modify
(newarray)
newArray
(modifyioref)
modifyIORef
(newioref)
newIORef
(control.monad)
Control.Monad
(data.list)
Data.List
(data.map)
Data.Map
(data.set)
Data.Set
(debug.trace)
Debug.Trace
(control.arrow)
Control.Arrow
(control.applicative)
Control.Applicative
(text.parsercombinators.parsec)
Text.ParserCombinators.Parsec
(data)
data
(data.bytestring.lazy.char8)
Data.ByteString.Lazy.Char8
(unfoldr)
unfoldr
(unsafeperformio)
unsafePerformIO
(monad m =>)
Monad m =>
(instance)
instance
(class)
class
(head)
head
(tail)
tail
(init)
init
(null)
null
(length)
length
(concatmap)
concatMap
(all)
all
(any)
any
(scanl)
scanl
(replicatem)
replicateM
(cycle)
cycle
(iterate)
iterate
(take)
take
(drop)
drop
(group)
group
(sort)
sort
(filter)
filter
(lines)
lines
(words)
words
(curry)
curry
(uncurry)
uncurry
(fst)
fst
(snd)
snd
(fail)
fail
(mzero)
mzero
(flip)
flip
(undefined)
undefined
(error)
error