結果
問題 | No.4 おもりと天秤 |
ユーザー | こまる |
提出日時 | 2020-10-18 23:10:06 |
言語 | Haskell (9.8.2) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,870 bytes |
コンパイル時間 | 2,872 ms |
コンパイル使用メモリ | 215,808 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-07-21 06:47:48 |
合計ジャッジ時間 | 3,599 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 1 ms
5,376 KB |
testcase_02 | WA | - |
testcase_03 | AC | 1 ms
5,376 KB |
testcase_04 | AC | 1 ms
5,376 KB |
testcase_05 | AC | 1 ms
5,376 KB |
testcase_06 | WA | - |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 1 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | AC | 1 ms
5,376 KB |
testcase_17 | AC | 1 ms
5,376 KB |
testcase_18 | WA | - |
testcase_19 | AC | 2 ms
5,376 KB |
testcase_20 | AC | 2 ms
5,376 KB |
testcase_21 | AC | 2 ms
5,376 KB |
testcase_22 | AC | 1 ms
5,376 KB |
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
{-# LANGUAGE BangPatterns #-} import Control.Monad.State import Data.Bool import Data.Char import Data.Coerce import qualified Data.ByteString.Char8 as BSC8 import qualified Data.Vector.Fusion.Stream.Monadic as VFSM import qualified Data.Vector.Unboxed as VU import qualified Data.Vector.Unboxed.Mutable as VUM type Parser a = StateT BSC8.ByteString Maybe a runParser :: Parser a -> BSC8.ByteString -> Maybe (a, BSC8.ByteString) runParser = runStateT {-# INLINE runParser #-} int :: Parser Int int = coerce $ BSC8.readInt . BSC8.dropWhile isSpace {-# INLINE int #-} seqInput :: Int -> IO (VU.Vector Int) seqInput n = VU.unfoldrN n (runParser int) <$> BSC8.getLine stream :: Monad m => Int -> Int -> VFSM.Stream m Int stream !l !r = VFSM.Stream step l where step x | x < r = return $ VFSM.Yield x (x + 1) | otherwise = return $ VFSM.Done {-# INLINE [0] step #-} {-# INLINE [1] stream #-} rep :: Monad m => Int -> (Int -> m ()) -> m () rep n = flip VFSM.mapM_ (stream 0 n) {-# INLINE rep #-} streamR :: Monad m => Int -> Int -> VFSM.Stream m Int streamR !l !r = VFSM.Stream step (r - 1) where step x | x >= l = return $ VFSM.Yield x (x - 1) | otherwise = return $ VFSM.Done {-# INLINE [0] step #-} {-# INLINE [1] streamR #-} rev :: Monad m => Int -> Int -> (Int -> m ()) -> m () rev l r = flip VFSM.mapM_ (streamR l (r + 1)) {-# INLINE rev #-} main :: IO () main = do n <- readLn :: IO Int w <- seqInput n let s = VU.sum w if odd s then putStrLn "impossible" else do dp <- VUM.replicate (5001) True rep n $ \i -> rev (w VU.! i) (s `div` 2) $ \j -> do dpjwi <- VUM.unsafeRead dp (j - w VU.! i) VUM.unsafeModify dp (|| dpjwi) j putStrLn . bool "impossible" "possible" =<< VUM.unsafeRead dp (s `div` 2)