結果

問題 No.5 数字のブロック
ユーザー highd
提出日時 2016-08-16 19:53:29
言語 Haskell
(9.10.1)
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 263 ms
コンパイル使用メモリ 159,872 KB
最終ジャッジ日時 2024-11-14 19:48:34
合計ジャッジ時間 880 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge5
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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-9.8.2/environments/default

<no location info>: warning: [GHC-98887]
    -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 #
プレゼンテーションモードにする

{-# 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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