{-# LANGUAGE BangPatterns, OverloadedStrings #-}

import Control.Monad
import Data.List
import Data.Bits
import Debug.Trace
import Data.Maybe
import qualified Data.ByteString.Char8 as C

main :: IO ()
main = do
  [n, m] <- readInts
  as <- readInts
  putStrLn $ solve n m as

solve n m as = if foldl' (\a x -> if 4 * m * x >= totalvotes then x + 1 else x) 0 as >= m
  then "Yes"
  else "No"
  where
    totalvotes = sum as

-- 以下ライブラリ

readInts :: IO [Int]
readInts = map (fst . fromJust . C.readInt) . C.words <$> C.getLine

readNInts :: Int -> IO [[Int]]
readNInts = flip replicateM readInts

readIntegers :: IO [Integer]
readIntegers = map (fst . fromJust . C.readInteger) . C.words <$> C.getLine

readNIntegers :: Int -> IO [[Integer]]
readNIntegers = flip replicateM readIntegers

getNLns :: Int -> IO [String]
getNLns = flip replicateM getLine