{-# LANGUAGE OverloadedStrings #-}
module Main where

import Data.Maybe
import qualified Data.ByteString.Char8 as C
import Control.Monad(forM_)
import Data.Int
import Data.List
import Data.Array
import Data.Word
import Data.Bits
import qualified Data.IntMap.Strict as IntMap
import qualified Data.Map as Map

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 standard template --

-- begin boolean flags template --
type Flags = IntMap.IntMap Word64
initFlags :: Flags
initFlags = IntMap.fromList (zip [0..10000] (repeat 0))

setFlag :: Int -> Flags -> Flags
setFlag i flags = IntMap.update f (i `shiftR` 6) flags
  where f = \x -> Just $ x .|. (1 `shiftL` (i .&. 0x3f))

getFlag :: Int -> Flags -> Bool
getFlag i flags = ((flags IntMap.! (i `shiftR` 6)) .&. (1 `shiftL` (i .&. 0x3f))) /= 0
-- end boolean flags 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
    xs' = listArray (1,n) xs
    visited = initFlags
    (_, count) = f n xs' visited 0
    diff = count

f :: Int -> Array Int Int -> Flags -> Int -> (Flags, Int)
f 0 xs visited count = (visited, count)
f i xs visited count = if getFlag (toEnum i) visited == True
                       then f (i - 1) xs visited  count
                       else f (i - 1) xs visited' (count + count')
                         where
                           (visited', count') = g i i xs visited 0

g :: Int -> Int -> Array Int Int -> Flags -> Int -> (Flags, Int)
g s i xs visited count = if (xs ! i) == s
                         then (visited', count)
                         else g s (xs ! i) xs visited' (count + 1)
                           where visited' = setFlag i visited