import Control.Applicative ((<$>), (<*>), (<*), (*>), (<$))
import Control.Monad
import Data.List

main :: IO ()
main = do
  solve <$> getl (wrds toInt) >>= print

solve :: [Int] -> Int
solve [n,k] = k * (k-1) ^ (n-1)

toInt :: String -> Int
toInt = read

wrds :: (String -> a) -> String -> [a]
wrds f = map f . words

getl :: (String -> a) -> IO a
getl f = f <$> getLine
