結果
| 問題 |
No.649 ここでちょっとQK!
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2018-10-18 20:30:35 |
| 言語 | Haskell (9.10.1) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,000 bytes |
| コンパイル時間 | 10,552 ms |
| コンパイル使用メモリ | 208,128 KB |
| 実行使用メモリ | 254,208 KB |
| 最終ジャッジ日時 | 2024-11-07 01:08:11 |
| 合計ジャッジ時間 | 37,578 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 23 WA * 8 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
{-# Language StrictData, BangPatterns #-}
import Data.List
import qualified Data.Vector.Unboxed as U
import Control.Monad
data Fenwick = Leaf Int
| Node Fenwick Int Int Fenwick
deriving (Show, Eq)
create :: Int -> Fenwick
create 1 = Leaf 0
create n = Node (create $! n - 1) (2 ^ (n - 1)) 0 (create $! n - 1)
add :: Int -> Int -> Fenwick -> Fenwick
add _ x (Leaf y) = Leaf $! x + y
add i x (Node lch sz ps rch)
| i == sz - 1 = Node lch sz (ps + x) rch
| i < sz = Node (add i x lch) sz (ps + x) rch
| otherwise = Node lch sz ps $! add (i - sz) x rch
binSearch :: Int -> Fenwick -> Int
binSearch = go 0
where go !i rest (Leaf x)
| x == rest = i
| otherwise = i + 1
go !i !rest (Node lch sz ps rch)
| rest <= ps = go i rest lch
| otherwise = go (i + sz) (rest - ps) rch
findNum :: Int -> U.Vector Int -> Int
findNum x v = go 0 (U.length v)
where go !l !r
| r - l == 1 = l
| otherwise =
let m = (l + r) `div` 2 in
if v U.! m <= x then go m r else go l m
data Query = Add Int
| Print
deriving (Show, Eq)
parse s = case words s of
[_, n] -> Add (read n)
_ -> Print
collectValues :: [Query] -> U.Vector Int
collectValues = U.fromList . sort . foldl' iter []
where iter !acc (Add v) = v : acc
iter !acc _ = acc
main :: IO ()
main = do
[q, k] <- mapM readIO . words =<< getLine
qs <- replicateM q $ parse <$> getLine
let vals = collectValues qs
go :: [Query] -> Int -> Fenwick -> IO ()
go [] _ _ = return ()
go (Print : rest) !cnt !fwt
| cnt < k = do
print $ -1
go rest cnt fwt
| otherwise = do
let index = binSearch k fwt
print $! vals U.! index
go rest (cnt - 1) (add index (-1) fwt)
go (Add v : rest) !cnt !fwt =
let index = findNum v vals in
go rest (cnt + 1) (add index 1 fwt)
go qs 0 $ create 18