結果
問題 |
No.45 回転寿司
|
ユーザー |
|
提出日時 | 2023-05-20 11:08:30 |
言語 | Haskell (9.10.1) |
結果 |
AC
|
実行時間 | 11 ms / 5,000 ms |
コード長 | 668 bytes |
コンパイル時間 | 9,956 ms |
コンパイル使用メモリ | 169,472 KB |
実行使用メモリ | 8,320 KB |
最終ジャッジ日時 | 2024-12-21 09:40:41 |
合計ジャッジ時間 | 10,450 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 30 |
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:25:22: 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." | 25 | n :: Int <- read . head <$> prompt | ^^^^ [2 of 2] Linking a.out
ソースコード
module Main where split :: String -> [String] split = go ("", []) where go :: (String, [String]) -> String -> [String] go (a, acc) "" = acc <> [a] go (a, acc) (' ' : xs) = go ("", acc <> [a]) xs go (a, acc) (x : xs) = go (a <> [x], acc) xs prompt :: IO [String] prompt = do split <$> getLine solve :: Int -> [Int] -> Int solve n (v : vs) = go 1 (0, v) vs where go :: Int -> (Int, Int) -> [Int] -> Int go _ (_, r) [] = r go i (a, b) (x : xs) | i == n = b | otherwise = go (i + 1) (b, max (a + x) b) xs main :: IO () main = do n :: Int <- read . head <$> prompt vs :: [Int] <- map read <$> prompt print $ solve n vs