結果
| 問題 | No.40 多項式の割り算 |
| コンテスト | |
| ユーザー |
aimy
|
| 提出日時 | 2017-08-27 13:27:00 |
| 言語 | Haskell (9.10.1) |
| 結果 |
AC
|
| 実行時間 | 29 ms / 5,000 ms |
| コード長 | 396 bytes |
| コンパイル時間 | 9,187 ms |
| コンパイル使用メモリ | 171,264 KB |
| 実行使用メモリ | 11,904 KB |
| 最終ジャッジ日時 | 2024-11-06 06:40:25 |
| 合計ジャッジ時間 | 7,849 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 32 |
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:13:5: 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."
|
13 | | head bs == 0 = poly (d - 1) (tail bs)
| ^^^^
Main.hs:13:34: 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."
|
13 | | head bs == 0 = poly (d - 1) (tail bs)
| ^^^^
[2 of 2] Linking a.out
ソースコード
main = do d <- readLn bs <- map read . words <$> getLine let r = poly d (reverse bs) let n = length r - 1 print n putStrLn $ unwords (map show r) poly d bs | all (== 0) bs = [0] | d == 3 && bs!!0 == bs!!2 && bs!!1 == 0 = [0] | d < 3 = reverse (dropWhile (== 0) bs) | head bs == 0 = poly (d - 1) (tail bs) | otherwise = let (b1:b2:b3:br) = bs in poly (d - 1) (b2:(b3+b1):br)
aimy