{-# LANGUAGE DataKinds #-} {-# LANGUAGE TypeOperators #-} {-# LANGUAGE KindSignatures #-} {-# LANGUAGE ScopedTypeVariables #-} {-# LANGUAGE FlexibleContexts #-} {-# LANGUAGE TupleSections #-} {-# LANGUAGE TypeFamilies #-} {-# LANGUAGE MultiWayIf #-} {-# LANGUAGE RankNTypes #-} {-# LANGUAGE BangPatterns#-} {-# OPTIONS_GHC -O2 #-} import GHC.TypeLits import Data.Int import Data.Proxy import qualified Data.Map.Lazy as Map import Data.List import Data.Bits import Data.Maybe import qualified Data.ByteString.Char8 as BS 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.Array.IArray as Array import Data.Array.MArray import Data.Array.ST import Data.Monoid import Data.Semigroup import Control.Applicative import Control.Monad import Control.Monad.ST --import Control.Monad.Primitive import Control.Monad.State import Debug.Trace getInts :: IO [Int] getInts = map (fst . fromJust . BS.readInt) . BS.words <$> BS.getLine main :: IO () main = do [n,q] <- getInts a <- getInts q <- replicateM q $ getInts let f = runST $ do seg <- newSegmentTree n :: ST s (SegmentTree s (Min (Int, Int))) forM_ (zip [0..] a) $ \(i, x) -> updateSegmentTree seg i (Min (x, i)) forM q $ \[i, l, r] -> do if | i == 1 -> do (Min (x, _)) <- getSegmentTree seg (l-1) l (Min (y, _)) <- getSegmentTree seg (r-1) r updateSegmentTree seg (l-1) (Min (y, l-1)) updateSegmentTree seg (r-1) (Min (x, r-1)) return Nothing | i == 2 -> return . Just =<< getSegmentTree seg (l-1) r mapM_ print $ map ((+1) . snd . getMin) . catMaybes $ f return () data SegmentTree s m = SegmentTree {segmentTree :: VM.MVector s m} newSegmentTree :: Monoid m => Int -> ST s (SegmentTree s m) newSegmentTree n = return . SegmentTree =<< VM.replicate (2 * size) mempty where size = head [m | i <- [0..], let m = 2 ^ i, m >= n] updateSegmentTree :: Monoid m => SegmentTree s m -> Int -> m -> ST s () updateSegmentTree seg i val = do VM.write s (n + i) val aux $ (n + i) `div` 2 where s = segmentTree seg n = (VM.length s) `div` 2 aux i = do when (i >= 1) $ do VM.read s (i * 2 + 0) >>= \a -> do VM.read s (i * 2 + 1) >>= \b -> do VM.write s i (a <> b) >> aux (i `div` 2) getSegmentTree :: Monoid m => SegmentTree s m -> Int -> Int -> ST s m getSegmentTree seg x y = do aux 1 0 n where s = segmentTree seg n = (VM.length s) `div` 2 aux i l r | r <= x || y <= l = return mempty | x <= l && r <= y = VM.read s i | otherwise = aux (i * 2 + 0) l ((l + r) `div` 2) >>= \a -> do aux (i * 2 + 1) ((l + r) `div` 2) r >>= \b -> do return $ a <> b