結果
| 問題 | 
                            No.370 道路の掃除
                             | 
                    
| コンテスト | |
| ユーザー | 
                             aimy
                         | 
                    
| 提出日時 | 2017-05-03 08:39:47 | 
| 言語 | Haskell  (9.10.1)  | 
                    
| 結果 | 
                             
                                WA
                                 
                             
                            
                         | 
                    
| 実行時間 | - | 
| コード長 | 328 bytes | 
| コンパイル時間 | 5,381 ms | 
| コンパイル使用メモリ | 173,568 KB | 
| 実行使用メモリ | 8,192 KB | 
| 最終ジャッジ日時 | 2024-09-14 07:00:20 | 
| 合計ジャッジ時間 | 6,780 ms | 
| 
                            ジャッジサーバーID (参考情報)  | 
                        judge3 / judge5 | 
(要ログイン)
| ファイルパターン | 結果 | 
|---|---|
| other | AC * 6 WA * 28 | 
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
[1 of 2] Compiling Main             ( Main.hs, Main.o )
Main.hs:11:56: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘head’
    (imported from Data.List, but defined in GHC.List):
    "This is a partial function, it throws an error on empty lists. Use pattern matching or Data.List.uncons instead. Consider refactoring to use Data.List.NonEmpty."
   |
11 |  where move ds = guard ((not.null) ds) >> return (abs (head ds), map (subtract (head ds)) (tail ds))
   |                                                        ^^^^
Main.hs:11:81: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘head’
    (imported from Data.List, but defined in GHC.List):
    "This is a partial function, it throws an error on empty lists. Use pattern matching or Data.List.uncons instead. Consider refactoring to use Data.List.NonEmpty."
   |
11 |  where move ds = guard ((not.null) ds) >> return (abs (head ds), map (subtract (head ds)) (tail ds))
   |                                                                                 ^^^^
Main.hs:11:92: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘tail’
    (imported from Data.List, but defined in GHC.List):
    "This is a partial function, it throws an error on empty lists. Replace it with drop 1, or use pattern matching or Data.List.uncons instead. Consider refactoring to use Data.List.NonEmpty."
   |
11 |  where move ds = guard ((not.null) ds) >> return (abs (head ds), map (subtract (head ds)) (tail ds))
   |                                                                                            ^^^^
[2 of 2] Linking a.out
            
            ソースコード
import Data.List import Data.Ord import Control.Monad main = do [n,_] <- map read . words <$> getLine ds <- map read . words <$> getContents print (clean n ds) clean n = sum . take n . unfoldr move . sortBy (comparing abs) where move ds = guard ((not.null) ds) >> return (abs (head ds), map (subtract (head ds)) (tail ds))
            
aimy