結果
| 問題 | No.52 よくある文字列の問題 |
| コンテスト | |
| ユーザー |
くれちー
|
| 提出日時 | 2017-03-15 23:42:08 |
| 言語 | Haskell (9.14.1) |
| 結果 |
AC
|
| 実行時間 | 6 ms / 5,000 ms |
| コード長 | 439 bytes |
| 記録 | |
| コンパイル時間 | 2,772 ms |
| コンパイル使用メモリ | 193,280 KB |
| 実行使用メモリ | 10,112 KB |
| 最終ジャッジ日時 | 2026-04-10 11:14:59 |
| 合計ジャッジ時間 | 2,254 ms |
|
ジャッジサーバーID (参考情報) |
judge3_0 / judge1_0 |
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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-9.14.1/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.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"."
|
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.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"."
|
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
くれちー