結果
| 問題 | 
                            No.627 ランダムウォークの軌跡
                             | 
                    
| コンテスト | |
| ユーザー | 
                             はむ吉🐹
                         | 
                    
| 提出日時 | 2018-01-05 22:20:53 | 
| 言語 | Haskell  (9.10.1)  | 
                    
| 結果 | 
                             
                                AC
                                 
                             
                            
                         | 
                    
| 実行時間 | 3 ms / 2,000 ms | 
| コード長 | 324 bytes | 
| コンパイル時間 | 11,996 ms | 
| コンパイル使用メモリ | 175,616 KB | 
| 実行使用メモリ | 5,248 KB | 
| 最終ジャッジ日時 | 2024-12-23 06:45:54 | 
| 合計ジャッジ時間 | 3,204 ms | 
| 
                            ジャッジサーバーID (参考情報)  | 
                        judge1 / judge2 | 
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| ファイルパターン | 結果 | 
|---|---|
| other | AC * 33 | 
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:4:24: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘tail’
    (imported from Prelude, 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."
  |
4 | diff xs = zipWith (-) (tail xs) (init xs)
  |                        ^^^^
[2 of 2] Linking a.out
            
            ソースコード
import Control.Monad (replicateM)
diff :: Num a => [a] -> [a]
diff xs = zipWith (-) (tail xs) (init xs)
judge :: Integral a => [a] -> Bool
judge = all (== 1) . fmap abs . diff . (0 :)
main :: IO ()
main = do
    t <- readLn :: IO Int
    xs <- replicateM t readLn :: IO [Int]
    putStrLn $ if judge xs then "T" else "F"
            
            
            
        
            
はむ吉🐹