結果

問題 No.116 門松列(1)
コンテスト
ユーザー 情報学生
提出日時 2019-08-16 12:02:03
言語 Haskell
(9.14.1)
コンパイル:
ghc -rtsopts -with-rtsopts=-K1G -o a.out -O2 _filename_
実行:
./a.out
結果
AC  
実行時間 3 ms / 5,000 ms
コード長 486 bytes
記録
記録タグの例:
初AC ショートコード 純ショートコード 純主流ショートコード 最速実行時間
コンパイル時間 6,647 ms
コンパイル使用メモリ 194,304 KB
実行使用メモリ 6,400 KB
最終ジャッジ日時 2026-04-10 07:35:07
合計ジャッジ時間 7,889 ms
ジャッジサーバーID
(参考情報)
judge1_0 / judge2_0
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 21
権限があれば一括ダウンロードができます
コンパイルメッセージ
Loaded package environment from /home/judge/.ghc/x86_64-linux-9.14.1/environments/default
[1 of 2] Compiling Main             ( Main.hs, Main.o )
Main.hs:6:16: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘tail’
    (imported from Prelude, but defined in GHC.Internal.List):
    "This is a partial function, it throws an error on empty lists. Replace it with 'drop' 1, or use pattern matching or 'GHC.Internal.Data.List.uncons' instead. Consider refactoring to use "Data.List.NonEmpty"."
  |
6 |         f xs = tail xs ++ [head xs]
  |                ^^^^

Main.hs:6:28: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘head’
    (imported from Prelude, but defined in GHC.Internal.List):
    "This is a partial function, it throws an error on empty lists. Use pattern matching, 'Data.List.uncons' or 'Data.Maybe.listToMaybe' instead. Consider refactoring to use "Data.List.NonEmpty"."
  |
6 |         f xs = tail xs ++ [head xs]
  |                            ^^^^

Main.hs:15:90: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘tail’
    (imported from Prelude, but defined in GHC.Internal.List):
    "This is a partial function, it throws an error on empty lists. Replace it with 'drop' 1, or use pattern matching or 'GHC.Internal.Data.List.uncons' instead. Consider refactoring to use "Data.List.NonEmpty"."
   |
15 | main = interact $ show . length . filter id . map isKadomatsu . triple_pair . map read . tail . words
   |                                                                                          ^^^^

[2 of 2] Linking a.out

ソースコード

diff #
raw source code

triple_pair :: [Int] -> [(Int, Int, Int)]
triple_pair xs = (init . init) $ zip3 xs (f xs) (f (f xs))
    where
        f :: [Int] -> [Int]
        f [] = []
        f xs = tail xs ++ [head xs]

isKadomatsu :: (Int, Int, Int) -> Bool
isKadomatsu (a, b, c)
    | a > b && b < c && a /= c = True
    | a < b && b > c && a /= c = True
    | otherwise                = False

main :: IO ()
main = interact $ show . length . filter id . map isKadomatsu . triple_pair . map read . tail . words
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