import Control.Applicative ((<$>))
import Control.Monad (when, forM_, foldM)
import Data.Vector.Unboxed.Mutable (IOVector, STVector)
import qualified Data.Vector.Unboxed.Mutable as VM

main :: IO ()
main = solve >>= print

solve :: IO Int
solve = do
  [n, k] <- map read <$> words <$> getLine :: IO [Int]
  pt <- VM.replicate (n+1) 0 :: IO (IOVector Int)
  forM_ [2 .. n] $ \i -> do
    x <- VM.read pt i
    when (x == 0) $ do
      VM.write pt i 1
      forM_ [2*i, 3*i .. n] $ \j -> do
        modify pt j (+1)
  foldM (f k pt) 0 [2 .. n]
  where f k pt c i = do
          x <- VM.read pt i
          if x >= k then return (c+1)
            else return c
  
modify :: IOVector Int -> Int -> (Int -> Int) -> IO ()
modify v i f = do
  x <- VM.read v i
  VM.write v i (f x)