結果
| 問題 |
No.22 括弧の対応
|
| コンテスト | |
| ユーザー |
佐藤淳平
|
| 提出日時 | 2019-09-06 11:17:13 |
| 言語 | Haskell (9.10.1) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 5,000 ms |
| コード長 | 673 bytes |
| コンパイル時間 | 5,292 ms |
| コンパイル使用メモリ | 180,204 KB |
| 実行使用メモリ | 6,944 KB |
| 最終ジャッジ日時 | 2024-07-20 07:44:40 |
| 合計ジャッジ時間 | 3,912 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 19 |
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:14:37: 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."
|
14 | else if head xs == k
| ^^^^
Main.hs:17:50: 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."
|
17 | then head xs
| ^^^^
Main.hs:18:61: 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."
|
18 | else f (i + 1) (tail xs) cs
| ^^^^
[2 of 2] Linking a.out
ソースコード
import Control.Applicative ((<$>), (<*>))
import Data.ByteString.Char8 (ByteString)
import qualified Data.ByteString.Char8 as B
main :: IO ()
main = solve <$> (map read . words <$> getLine) <*> B.getLine >>= print
solve :: [Int] -> ByteString -> Int
solve [n, k] s = f 1 [] u
where
u = B.unpack s
f i xs (c:cs) = if c == '('
then f (i + 1) (i : xs) cs
else if head xs == k
then i
else if i == k
then head xs
else f (i + 1) (tail xs) cs
佐藤淳平