fun readInt () =
    valOf (TextIO.scanStream (Int.scan StringCvt.DEC) TextIO.stdIn)

fun quicksort [] = []
  | quicksort (h::tl) =
    let 
        val (s, b) =
            List.foldl
                (fn (x, (small, big)) =>
                    if x <= h then (x::small, big)
                    else (small, x::big))
                ([], [])
                tl
    in
        (quicksort s) @ [h] @ (quicksort b)
    end

fun takeOutCandies _ [] = 0
  | takeOutCandies numToTake (h::tl) =
    if h = numToTake then List.length tl
    else if h < numToTake then takeOutCandies (numToTake - h) tl
    else List.length (h::tl)

val () =
    let
        val n = readInt ()
        val m = readInt ()
        val c_s = List.tabulate (n, fn _ => readInt ())
        val ans = n - takeOutCandies m (quicksort c_s)
    in
        print (Int.toString ans ^ "\n")
    end