import qualified Data.Array.IO as I

main :: IO ()
main = do
  [n, k] <- fmap (map read . words) $ getLine :: IO [Integer]
  ds <- fmap (map read . words) $ getLine :: IO [Integer]
  is <- I.newListArray (1, n) ds :: IO (I.IOArray Integer Integer)
  result <- sortCount n 1 0 is

  putStrLn $ if result > k || (odd result && even k) || (even result && odd k)
             then "NO"
             else "YES"

sortCount :: Integer -> Integer -> Integer -> I.IOArray Integer Integer -> IO (Integer)
sortCount n i c _
  | n + 1 == i = return c
sortCount n i c xs = do
  a1 <- I.readArray xs i
  if a1 == i
     then sortCount n (i + 1) c xs
     else do
      a2 <- I.readArray xs a1
      I.writeArray xs i a2
      I.writeArray xs a1 a1
      sortCount n i (c + 1) xs