結果
| 問題 |
No.2299 Antitypoglycemia
|
| コンテスト | |
| 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