{-# LANGUAGE BangPatterns #-} {-# LANGUAGE BinaryLiterals #-} {-# LANGUAGE MultiWayIf #-} {-# LANGUAGE NumDecimals #-} {-# LANGUAGE ScopedTypeVariables #-} {-# LANGUAGE TupleSections #-} {-# LANGUAGE FlexibleContexts #-} {-# OPTIONS_GHC -O2 #-} {-# OPTIONS_GHC -Wno-tabs #-} import Control.Applicative import Control.Arrow import Control.Monad import Control.Monad.ST import Data.Char import Data.List import Data.Maybe import qualified Data.ByteString.Char8 as B import Data.Array import Data.Array.ST.Safe import Data.STRef import Debug.Trace import Text.Printf import Data.Ratio readInt = readLn :: IO Int readInteger = readLn :: IO Integer readInts = map ( fst . fromJust . B.readInt ) . B.words <$> B.getLine readIntegers = map ( fst . fromJust . B.readInteger ) . B.words <$> B.getLine which a b f = if f then a else b yesno = which "Yes" "No" mp [ a, b ] = ( a, b ) modifyArray a i f = writeArray a i =<< f <$> readArray a i printList :: Show a => [a] -> IO () printList = putStrLn . intercalate " " . map show main = do [ a, b ] :: [Double] <- map read . words <$> getLine print $ approxRational ( a ** b ) 1e-12