結果

問題 No.1232 2^x = x
ユーザー かりあげクンかりあげクン
提出日時 2020-09-23 14:16:12
言語 Haskell
(9.8.2)
結果
WA  
実行時間 -
コード長 1,762 bytes
コンパイル時間 1,099 ms
コンパイル使用メモリ 193,260 KB
実行使用メモリ 11,648 KB
最終ジャッジ日時 2023-09-10 07:12:06
合計ジャッジ時間 2,084 ms
ジャッジサーバーID
（参考情報） 		judge11 / judge13
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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 WA -
testcase_01 WA -
testcase_02 WA -
testcase_03 WA -
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コンパイルメッセージ
Loaded package environment from /home/judge/.ghc/x86_64-linux-9.6.1/environments/default
[1 of 2] Compiling Main             ( Main.hs, Main.o )

Main.hs:27:33: warning: [GHC-68441] [-Wdeprecations]
    In the use of ‘powModInteger’
    (imported from GHC.Integer.GMP.Internals):
    Deprecated: "Use integerPowMod# instead"
   |
27 | powModInt a b c = fromInteger $ GMP.powModInteger (fromIntegral a) (fromIntegral b) (fromIntegral c)
   |                                 ^^^^^^^^^^^^^^^^^
[2 of 2] Linking a.out

ソースコード

diff # 

{-# LANGUAGE BangPatterns #-}
{- base -}
import           Control.Arrow
import           Control.Monad
import           Control.Monad.ST
import           Data.Bool
import           Data.Char
{- integer-gmp -}
import qualified GHC.Integer.GMP.Internals         as GMP
{- bytestring -}
import qualified Data.ByteString.Char8             as BSC8
{- vector -}
import qualified Data.Vector                       as V
import qualified Data.Vector.Fusion.Stream.Monadic as VFSM
import qualified Data.Vector.Unboxed               as VU
import qualified Data.Vector.Unboxed.Mutable       as VUM


main :: IO ()
main = do
  n  <- parse1
  rep n $ \_ -> do
    p <-parse1
    print $ tetrationMod 2 32 (p * (p - 1))

powModInt :: Int -> Int -> Int -> Int
powModInt a b c = fromInteger $ GMP.powModInteger (fromIntegral a) (fromIntegral b) (fromIntegral c)
{-# INLINE powModInt #-}

tetrationMod :: Int -> Int -> Int -> Int
tetrationMod a b m
  | m == 1 = 0
  | a == 0 = bool 0 1 (even b)
  | b == 0 = 1
  | b == 1 = a `mod` m
  | b == 2 = powModInt a b m
  | otherwise = let phi = m - 1
                in powModInt (a `mod` m) ((tetrationMod a (b - 1) phi) + phi) m

-- input
type Parser a = BSC8.ByteString -> Maybe (a, BSC8.ByteString)
parseInt :: Parser Int
parseInt = fmap (second BSC8.tail) . BSC8.readInt
parse1 :: IO Int
parse1 = readLn
parseN :: Int -> IO (VU.Vector Int)
parseN n = VU.replicateM n parse1

-- rep
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 #-}
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