import           Control.Monad
import qualified Data.ByteString.Char8 as BS
import           Data.Maybe

readInt = fst . fromJust . BS.readInt
readIntList = map readInt . BS.words
getInt = readInt <$> BS.getLine
getIntList = readIntList <$> BS.getLine

main = do
  [n, m] <- getIntList
  as <- getIntList

  let th = (sum as + 4*m + 1) `div` (4*m)
      as' = filter (>= th) as
      ans = if length as' >= m then "Yes" else "No"

  putStrLn ans