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

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 s = ((sum as) - 1) `div` (4 * m) + 1
    putStrLn $ if (length (filter (>= s) as)) >= m then "Yes" else "No"