結果
問題 | No.127 門松もどき |
ユーザー |
![]() |
提出日時 | 2015-05-09 22:27:35 |
言語 | Haskell (9.10.1) |
結果 |
RE
|
実行時間 | - |
コード長 | 1,486 bytes |
コンパイル時間 | 10,663 ms |
コンパイル使用メモリ | 208,768 KB |
実行使用メモリ | 288,032 KB |
最終ジャッジ日時 | 2024-07-05 21:19:38 |
合計ジャッジ時間 | 25,184 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 22 RE * 1 |
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 ) [2 of 2] Linking a.out
ソースコード
-- [元のコード] http://yukicoder.me/submissions/15723 import Control.Monad import qualified Data.Vector as V import qualified Data.Vector.Unboxed.Mutable as MV import qualified Data.ByteString.Char8 as B import Data.Maybe (fromJust) import Debug.Trace readInts :: B.ByteString -> [Int] readInts = map (fst . fromJust . B.readInt) . B.words getInts :: IO [Int] getInts = liftM readInts B.getLine main = do n <- readLn as <- liftM V.fromList getInts dp <- MV.replicate (2*3000*3000) (-1 :: Int) let at l r p = l + 3000 * (r + 3000 * p) f :: Int -> Int -> Int -> IO Int f l r p | l == r = return 0 | otherwise = do v <- MV.read dp (at l r p) if v /= (-1) then return v else g l r p g :: Int -> Int -> Int -> IO Int g l r p | p == 0 = do v <- f l (r-1) p v' <- if as V.! l < as V.! r then liftM (+1) (f (l+1) r (1-p)) else return 0 let res = max v v' MV.write dp (at l r p) res return res | otherwise = do v <- f (l+1) r p v' <- if as V.! r < as V.! l then liftM (+1) (f l (r-1) (1-p)) else return 0 let res = max v v' MV.write dp (at l r p) res return res xs = liftM concat $ forM [0..n-1] $ \i -> forM [i+1..n-1] $ \j -> liftM2 (((+1).) . max) (f i j 0) (f i j 1) in print =<< liftM maximum xs