結果
| 問題 | No.716 距離 | 
| コンテスト | |
| ユーザー |  情報学生 | 
| 提出日時 | 2019-09-17 22:25:20 | 
| 言語 | Haskell (9.10.1) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 2 ms / 2,000 ms | 
| コード長 | 752 bytes | 
| コンパイル時間 | 2,421 ms | 
| コンパイル使用メモリ | 180,788 KB | 
| 実行使用メモリ | 5,376 KB | 
| 最終ジャッジ日時 | 2024-07-07 13:51:55 | 
| 合計ジャッジ時間 | 4,186 ms | 
| ジャッジサーバーID (参考情報) | judge2 / judge1 | 
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| ファイルパターン | 結果 | 
|---|---|
| other | AC * 40 | 
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:28:24: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘head’
    (imported from Prelude, 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."
   |
28 |         ma = last xs - head xs
   |                        ^^^^
[2 of 2] Linking a.out
            
            ソースコード
import Control.Applicative ((<$>))
import Data.List (unfoldr)
import Data.Char (isSpace)
import Data.ByteString.Char8 (ByteString)
import qualified Data.ByteString.Char8 as B
getL :: (ByteString -> [Int]) -> IO [Int]
getL f = f <$> B.getLine
readIL :: (ByteString -> Maybe (Int, ByteString)) -> (ByteString -> [Int])
readIL f = unfoldr g
    where
        g s = do
            (n, s') <- f s
            return (n, B.dropWhile isSpace s')
main :: IO ()
main = do
    B.getLine
    [mi, ma] <- solve <$> getL (readIL B.readInt)
    print mi
    print ma
solve :: [Int] -> [Int]
solve xs = [mi, ma]
    where
        mi = minimum $ f xs
        ma = last xs - head xs
f :: [Int] -> [Int]
f []       = []
f [_]      = []
f (x:y:zs) = (y-x) : f (y:zs)
            
            
            
        