結果
問題 | No.52 よくある文字列の問題 |
ユーザー |
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提出日時 | 2017-03-15 23:42:08 |
言語 | Haskell (9.10.1) |
結果 |
AC
|
実行時間 | 10 ms / 5,000 ms |
コード長 | 439 bytes |
コンパイル時間 | 1,688 ms |
コンパイル使用メモリ | 174,080 KB |
実行使用メモリ | 8,064 KB |
最終ジャッジ日時 | 2024-09-22 05:29:29 |
合計ジャッジ時間 | 2,260 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 11 |
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:7:28: 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." | 7 | | x == True = solve1 (tail s) (s' ++ [head s]) xs | ^^^^ Main.hs:7:44: 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." | 7 | | x == True = solve1 (tail s) (s' ++ [head s]) xs | ^^^^ [2 of 2] Linking a.out
ソースコード
import Control.Monad (replicateM) import Data.List (nub) solve1 :: String -> String -> [Bool] -> String solve1 s s' (x : []) = s' ++ s solve1 s s' (x : xs) | x == True = solve1 (tail s) (s' ++ [head s]) xs | x == False = solve1 (init s) (s' ++ [last s]) xs solve2 :: Integral a => String -> a solve2 s = fromIntegral . length . nub . map (solve1 s "") $ replicateM (length s) [True, False] main = print . solve2 =<< getLine