結果
問題 |
No.2299 Antitypoglycemia
|
ユーザー |
|
提出日時 | 2023-05-14 21:00:42 |
言語 | Haskell (9.10.1) |
結果 |
AC
|
実行時間 | 57 ms / 2,000 ms |
コード長 | 674 bytes |
コンパイル時間 | 3,769 ms |
コンパイル使用メモリ | 175,744 KB |
実行使用メモリ | 15,872 KB |
最終ジャッジ日時 | 2024-11-30 07:55:55 |
合計ジャッジ時間 | 3,760 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 |
---|---|
sample | AC * 3 |
other | AC * 25 |
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:26:29: 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." | 26 | let [n, a, b] = map read [head vs, vs !! 1, vs !! 2] | ^^^^ [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 m = 998244353 fac :: Integer -> Integer fac 0 = 1 fac n = (fac (n - 1) * n) `mod` m solve :: Integer -> Integer -> Integer -> Integer solve n a b = let r = (fac n + ((m - 2) * fac (n - 1)) `mod` m) `mod` m in if a /= b then (r + fac (n - 2)) `mod` m else r main :: IO () main = do vs <- prompt let [n, a, b] = map read [head vs, vs !! 1, vs !! 2] print $ solve n a b