import qualified Data.ByteString.Char8 as B
import Data.Array.Base (unsafeRead, unsafeWrite)
import Data.Int (Int64)
import Data.Array.IO (IOUArray, newListArray)

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

sortCount :: Int -> Int64 -> Int -> 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 - 1) i xs