結果

問題 No.464 PPAP
ユーザー Hirotaka Ohkubo
提出日時 2017-03-02 18:34:37
言語 Haskell
(9.10.1)
結果
TLE  
実行時間 -
コード長 509 bytes
コンパイル時間 4,303 ms
コンパイル使用メモリ 178,548 KB
実行使用メモリ 16,420 KB
最終ジャッジ日時 2024-06-13 01:31:52
合計ジャッジ時間 7,807 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge3
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 * 4
other AC * 3 TLE * 1 -- * 18
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:10:29: 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."
   |
10 |   p1s = [ length p1 | p1 <- tail $ inits $ take (len-3) src, pali p1 ]
   |                             ^^^^

Main.hs:11:48: 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 |   p1p2s = [ (p1, length p2) | p1 <- p1s, p2 <- tail $ inits $ drop p1 $ take (len-2) src, pali p2 ]
   |                                                ^^^^
[2 of 2] Linking a.out

ソースコード

diff # 

import Data.List

pali xs = xs == reverse xs

compute = length . comp4s

comp4s src = quads where
  len = length src
  p3s = reverse [ length p3 | p3 <- init $ tails $ drop 3 src, pali p3 ]
  p1s = [ length p1 | p1 <- tail $ inits $ take (len-3) src, pali p1 ]
  p1p2s = [ (p1, length p2) | p1 <- p1s, p2 <- tail $ inits $ drop p1 $ take (len-2) src, pali p2 ]
  quads = [ (p1,p2,len - p1 - p2 - p3,p3) | (p1,p2) <- p1p2s, p3 <- takeWhile (len - p1 - p2 >) p3s ]

main = do
  l <- getLine
  print $ compute l
0