結果

問題 No.273 回文分解
ユーザー aimy
提出日時 2017-04-25 14:21:47
言語 Haskell
(9.10.1)
結果
AC  
実行時間 3 ms / 2,000 ms
コード長 235 bytes
コンパイル時間 4,239 ms
コンパイル使用メモリ 176,640 KB
実行使用メモリ 6,944 KB
最終ジャッジ日時 2024-06-25 13:50:44
合計ジャッジ時間 4,430 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge5
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 32
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-9.8.2/environments/default
[1 of 2] Compiling Main             ( Main.hs, Main.o )

Main.hs:6:19: 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."
  |
6 | lpalin = length . head . filter isPalin . tail . sortBy (flip (comparing length)) . partitions
  |                   ^^^^

Main.hs:6:43: 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."
  |
6 | lpalin = length . head . filter isPalin . tail . sortBy (flip (comparing length)) . partitions
  |                                           ^^^^
[2 of 2] Linking a.out

ソースコード

diff #
プレゼンテーションモードにする

import Data.List
import Data.Ord
main = getLine >>= print . lpalin
lpalin = length . head . filter isPalin . tail . sortBy (flip (comparing length)) . partitions
 where isPalin s = s == reverse s
partitions = concatMap tails . inits
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