結果

問題 No.5 数字のブロック
ユーザー highdhighd
提出日時 2016-08-16 19:53:29
言語 Haskell
(9.8.2)
結果
CE  
(最新)
AC  
(最初)
実行時間 -
コード長 1,421 bytes
コンパイル時間 4,122 ms
コンパイル使用メモリ 146,836 KB
最終ジャッジ日時 2023-08-23 08:22:22
合計ジャッジ時間 4,911 ms
ジャッジサーバーID
(参考情報)
judge15 / judge11
このコードへのチャレンジ(β)
コンパイルエラー時のメッセージ・ソースコードは、提出者また管理者しか表示できないようにしております。(リジャッジ後のコンパイルエラーは公開されます)
ただし、clay言語の場合は開発者のデバッグのため、公開されます。

コンパイルメッセージ
Loaded package environment from /home/judge/.ghc/x86_64-linux-9.6.1/environments/default

<no location info>: warning:
    -XGeneralizedNewtypeDeriving is not allowed in Safe Haskell; ignoring -XGeneralizedNewtypeDeriving
[1 of 2] Compiling Main             ( Main.hs, Main.o )

Main.hs:11:10: error: [GHC-59692]
    Duplicate instance declarations:
      instance [safe] Monoid a => Monoid (IO a)
        -- Defined at Main.hs:11:10
      instance Monoid a => Monoid (IO a) -- Defined in ‘GHC.Base’
   |
11 | instance Monoid a => Monoid (IO a) where
   |          ^^^^^^^^^^^^^^^^^^^^^^^^^

ソースコード

diff #

{-# LANGUAGE Safe #-}
{-# LANGUAGE PatternGuards #-}
import qualified Data.Text as T
import qualified Data.Text.IO as TI
import qualified Data.List as L
import Data.Monoid
import Data.Maybe
import Control.Applicative
import Data.Foldable

instance Monoid a => Monoid (IO a) where
	mempty = return mempty
	mappend a b = mappend <$> a <*> b

dropMay::Int->[a]->Maybe [a]
dropMay 0 [] = Just []
dropMay _ [] = Nothing
dropMay 0 list = Just list
dropMay v (x:xs) = dropMay (v-1) xs
	
(!-!)::[a]->Int->Maybe a
[] 		!-! _ = Nothing
(x:xs) 	!-! 0 = Just x
(x:xs) 	!-! n = xs !-! (n-1)

(<$~>)::Functor f => f a -> (a -> b) -> f b
(<$~>)=flip (<$>)

maybeRead s
	|[(x,"")]<-(reads s)=Just x
	|otherwise = Nothing

maybeList::[Maybe Int]->Maybe [Int]
maybeList [] = Just []
maybeList ((Just a):xs) = (a:) <$> (maybeList xs)
maybeList (Nothing:xs) = Nothing
	
getLines::Int->IO T.Text
getLines 1 = TI.getLine 
getLines n = TI.getLine <> return (T.pack " ") <> (getLines$n-1)
	
run main_f n= 
	getLines n			<$~>
	T.split (==' ')		<$~>
	fmap T.unpack		<$~>
	main_f				<$~>
	fmap show			<$~>
	fromMaybe "error"	>>=
	putStrLn

f l [] n sum
	| l < sum = n - 1
	|otherwise = n
f l (x:xs) n sum 
	| l >= sum = f l xs (n+1) (sum+x)
	|otherwise = n - 1;

main_ list = do
	let get n = maybeRead=<<(list !-! n)::Maybe Int
	l<-get 0
	ws<-maybeList=<<fmap maybeRead<$>dropMay 2 list::Maybe [Int]
	return$f l (L.sort ws) 0 0 

main =	run main_ 3
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