import Data.Array.Base (unsafeRead, unsafeWrite)
import Data.Int (Int64)
import qualified Data.Array.IO as I

main :: IO ()
main = do
  (n, k) <- fmap ((\[a, b] -> (read a, read b)) . words) $ getLine :: IO (Int, Int64)
  ds <- fmap (map (flip (-) 1 . read) . words) $ getLine :: IO [Int]
  is <- I.newListArray (0, n - 1) ds :: IO (I.IOUArray Int Int)
  result <- sortCount n k 0 is
  putStrLn result

sortCount :: Int -> Int64 -> Int -> I.IOUArray Int Int -> IO (String)
sortCount n k i _
  | k < 0  = return "NO"
  | n == i = return $ if odd k then "NO" else "YES"
sortCount n k i xs = do
  a1 <- unsafeRead xs i
  if a1 == i
     then sortCount n k (i + 1) xs
     else do
      a2 <- unsafeRead xs a1
      unsafeWrite xs i a2
      unsafeWrite xs a1 a1
      sortCount n k i xs