結果

問題 No.489 株に挑戦
ユーザー HaarHaar
提出日時 2018-09-04 05:40:03
言語 Haskell
(9.8.2)
結果
CE  
(最新)
AC  
(最初)
実行時間 -
コード長 3,523 bytes
コンパイル時間 180 ms
コンパイル使用メモリ 158,976 KB
最終ジャッジ日時 2024-04-27 02:36:29
合計ジャッジ時間 817 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge2
このコードへのチャレンジ
（要ログイン）
コンパイルエラー時のメッセージ・ソースコードは、提出者また管理者しか表示できないようにしております。（リジャッジ後のコンパイルエラーは公開されます）
ただし、clay言語の場合は開発者のデバッグのため、公開されます。

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:13:1: error: [GHC-87110]
    Could not load module ‘Control.Monad.Primitive’.
    It is a member of the hidden package ‘primitive-0.9.0.0’.
    Use -v to see a list of the files searched for.
   |
13 | import Control.Monad.Primitive
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Main.hs:29:1: error: [GHC-87110]
    Could not load module ‘Data.Set’.
    It is a member of the hidden package ‘containers-0.6.8’.
    Use -v to see a list of the files searched for.
   |
29 | import qualified Data.Set as Set
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

ソースコード

diff # 

{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE UnboxedTuples #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE BangPatterns #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE ViewPatterns #-}
{-# LANGUAGE TupleSections #-}
{-# LANGUAGE MultiWayIf #-}

import Control.Monad
import Control.Monad.ST
import Control.Monad.State
import Control.Monad.Primitive
import Control.Applicative
import Control.Arrow
import Data.List
import Data.Array
import Data.Array.IO
import Data.Array.ST
import Data.IORef
import Data.STRef
import Data.Maybe
import Data.Bits
import Data.Ord
import Data.Ratio
import Data.Int
import Data.Char
import qualified Data.ByteString.Char8 as BS
import qualified Data.Set as Set
import qualified Data.Vector as V
import qualified Data.Vector.Mutable as VM
import qualified Data.Vector.Unboxed as VU
import qualified Data.Vector.Unboxed.Mutable as VUM
import qualified Data.Vector.Generic as VG
import qualified Data.Vector.Generic.Mutable as VGM
import Data.Tuple
import Data.Function
import Text.Printf
import Debug.Trace
import Numeric

modifyArray arr i f = readArray arr i >>= \x -> writeArray arr i (f x)

listToTuple2 [a,b] = (a,b)
listToTuple3 [a,b,c] = (a,b,c)
listToTuple4 [a,b,c,d] = (a,b,c,d)
listToTuple5 [a,b,c,d,e] = (a,b,c,d,e)

readIntBS = fst . fromJust . BS.readInt

for = flip map

infixr 1 ?
(?) :: Bool -> (a,a) -> a
(?) b t = (if b then fst else snd) t

main :: IO ()
main = do
  [n,d,k] <- map read . words <$> getLine :: IO [Int]
  xs <- map read . lines <$> getContents :: IO [Int]
  let
    inf = maxBound :: Int
    max' (x,i) (y,j)
      | x > y = (x,i)
      | x < y = (y,j)
      | x == y = (x, min i j)
    ys = listArray (0,n-1) xs

  seg <- newSegmentTree n (-inf,-1) max' :: IO (IOUSegmentTree (Int,Int))
  forM_ (zip [0..n-1] xs) $ \(i,x) -> modifySegmentTree seg i (const (x,i))

  ((i,j),m) <- maximumBy (compare `on` snd) . reverse <$> (forM [0..n-1] $ \i -> findSegmentTree seg i (min (i+d+1) n) >>= \(m,j) -> return ((i,j),m-ys!i))

  if m <= 0 then
    print 0
    else
    print (m*k) >> printf "%d %d\n" i j


{-- 点更新・範囲取得のセグメント木 --}
type MSegmentTree v s a = (v s a, a, (a -> a -> a)) -- (セグメント木, 単位元, 二項演算)
type STSegmentTree s a = MSegmentTree VM.MVector s a
type IOSegmentTree a = STSegmentTree RealWorld a
type STUSegmentTree s a = MSegmentTree VUM.MVector s a
type IOUSegmentTree a = STUSegmentTree RealWorld a

newSegmentTree :: (PrimMonad m, VGM.MVector v a) => Int -> a -> (a -> a -> a) -> m (MSegmentTree v (PrimState m) a)
newSegmentTree n e f = return . (,e,f) =<< (VGM.replicate m e)
  where m = 2 * (2 ^ (ceiling $ logBase 2 (fromIntegral n))) - 1

modifySegmentTree :: (PrimMonad m, VGM.MVector v a) => MSegmentTree v (PrimState m) a -> Int -> (a -> a) -> m ()
modifySegmentTree (tree,e,f) i g = do
  VGM.write tree j =<< return . g =<< VGM.read tree j
  aux ((j-1)`div`2)
  where
    n = (VGM.length tree + 1) `div` 2
    j = i + n - 1
    aux i = do
      when (i >= 0) $ VGM.read tree (i*2+1) >>= \a -> VGM.read tree (i*2+2) >>= \b -> VGM.write tree i (f a b) >> aux ((i-1)`div`2)
        
findSegmentTree :: (PrimMonad m, VGM.MVector v a) => MSegmentTree v (PrimState m) a -> Int -> Int -> m a
findSegmentTree (tree,e,f) x y = do
  aux 0 0 n
  where
    n = (VGM.length tree) `div` 2 + 1
    aux i l r
      | r <= x || y <= l = return e
      | x <= l && r <= y = VGM.read tree i
      | otherwise = aux (i*2+1) l ((l+r)`div`2) >>= \a -> aux (i*2+2) ((l+r)`div`2) r >>= \b -> return (f a b)
0