結果
問題 |
No.3 ビットすごろく
|
ユーザー |
|
提出日時 | 2023-05-15 21:53:07 |
言語 | Haskell (9.10.1) |
結果 |
WA
|
実行時間 | - |
コード長 | 786 bytes |
コンパイル時間 | 10,761 ms |
コンパイル使用メモリ | 173,696 KB |
実行使用メモリ | 8,192 KB |
最終ジャッジ日時 | 2024-12-14 03:26:57 |
合計ジャッジ時間 | 12,292 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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ファイルパターン | 結果 |
---|---|
other | AC * 18 WA * 15 |
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:34:22: 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." | 34 | n :: Int <- read . head <$> prompt | ^^^^ [2 of 2] Linking a.out
ソースコード
split :: String -> [String] split = go ("", []) where go :: (String, [String]) -> String -> [String] go (a, acc) "" = acc <> [a] go (a, acc) (' ' : xs) = go ("", acc <> [a]) xs go (a, acc) (x : xs) = go (a <> [x], acc) xs prompt :: IO [String] prompt = do split <$> getLine bin :: Int -> [Int] bin x | x <= 1 = [x] | otherwise = let (n, r) = x `quotRem` 2 in bin n <> [r] d :: Int -> Int d = sum . bin solve :: Int -> Int solve n = go 1 1 [] where go :: Int -> Int -> [Int] -> Int go c p m | n == p = c | p `elem` m = -1 | otherwise = let proceed = p + d p in go (c + 1) (if proceed > n then p - d p else proceed) (p : m) main :: IO () main = do n :: Int <- read . head <$> prompt print $ solve n