結果
問題 | No.40 多項式の割り算 |
ユーザー |
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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 |
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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)