結果
| 問題 |
No.556 仁義なきサルたち
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-10-16 05:00:08 |
| 言語 | Haskell (9.10.1) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,343 bytes |
| コンパイル時間 | 2,955 ms |
| コンパイル使用メモリ | 215,040 KB |
| 実行使用メモリ | 8,320 KB |
| 最終ジャッジ日時 | 2024-07-20 20:17:42 |
| 合計ジャッジ時間 | 4,254 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 4 WA * 18 |
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.Arrow
import Control.Monad
import Control.Monad.Fix
import Control.Monad.State
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 = BSC8.ByteString -> Maybe (a, BSC8.ByteString)
parseInt :: Parser Int
parseInt = fmap (second BSC8.tail) . BSC8.readInt
parse2 :: IO (Int, Int)
parse2 = (\vec -> ((vec VU.! 0) - 1, (vec VU.! 1) - 1)) . VU.unfoldrN 2 parseInt <$> 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 #-}
type UnionFind = VUM.IOVector Int
newUF :: Int -> IO UnionFind
newUF n = VUM.replicate n (-1)
{-# INLINE newUF #-}
rootUF :: UnionFind -> Int -> IO Int
rootUF uf x = do
p <- VUM.unsafeRead uf x
if p < 0
then return x
else do
r <- rootUF uf p
VUM.unsafeWrite uf x r
return r
{-# INLINE rootUF #-}
connectedUF :: UnionFind -> Int -> Int -> IO Bool
connectedUF uf x y = liftM2 (==) (rootUF uf x) (rootUF uf y)
{-# INLINE connectedUF #-}
uniteUF :: UnionFind -> Int -> Int -> IO ()
uniteUF uf x y = do
a <- rootUF uf x
b <- rootUF uf y
when (a /= b) $ do
ar <- VUM.unsafeRead uf a
br <- VUM.unsafeRead uf b
let (p, c) = if ar < br then (a, b) else (b, a)
when (ar == br) $ VUM.unsafeModify uf pred p
VUM.unsafeWrite uf c p
connectGroupUF :: UnionFind -> IO Int
connectGroupUF uf = VU.length . VU.filter (>= 0) <$> VU.unsafeFreeze uf
{-# INLINE connectGroupUF #-}
sizeUF :: UnionFind -> Int -> IO Int
sizeUF uf = fix $ \loop x -> do
px <- VUM.unsafeRead uf x
if px < 0
then return $! negate px
else loop px
{-# INLINE sizeUF #-}
main :: IO ()
main = do
[n, m] <- map read . words <$> getLine
uf <- newUF n
rep m $ \_ -> do
(a, b) <- parse2
p <- rootUF uf a
q <- rootUF uf b
uniteUF uf p q
rep n $ \i -> do
print . succ =<< rootUF uf i