{-# LANGUAGE OverloadedStrings #-}

import Data.Maybe
import qualified Data.ByteString.Char8 as C
import Control.Monad(forM_)
import Data.Int
import Data.List

yes :: C.ByteString
yes = "YES"

no :: C.ByteString
no = "NO"

getInts :: IO [Int]
getInts = do
  ss <- C.getLine
  return $ map (fst . fromJust . C.readInt) $ C.words ss

getIntss :: Int -> IO [[Int]]
getIntss 0 = return []
getIntss n = do
  xs <- getInts
  xss <- getIntss (n - 1)  
  return $ xs : xss

-- end template --

main :: IO ()
main = do
  [n,k] <- getInts
  xs <- getInts
  let ss = solve n k xs
  C.putStrLn ss

solve :: Int -> Int -> [Int] -> C.ByteString
solve n k xs = if diff' <= k && mod diff' 2 == mod k 2 then yes else no
  where
    diff = length $ filter (\(x,y) -> x /= y) $ zip xs [1..]
    diff' = if diff == 0 then 0 else diff - 1