Problem:
Score : 600 points

Problem Statement

AtCoDeer the deer has N cards with positive integers written on them. The number on the i-th card (1≤i≤N) is a_i.
Because he loves big numbers, he calls a subset of the cards good when the sum of the numbers written on the cards in the subset, is K or greater.

Then, for each card i, he judges whether it is unnecessary or not, as follows:

If, for any good subset of the cards containing card i, the set that can be obtained by eliminating card i from the subset is also good, card i is unnecessary.

Otherwise, card i is NOT unnecessary.

Find the number of the unnecessary cards. Here, he judges each card independently, and he does not throw away cards that turn out to be unnecessary.

Constraints

All input values are integers.

1≤N≤5000

1≤K≤5000

1≤a_i≤10^9 (1≤i≤N)

Partial Score

300 points will be awarded for passing the test set satisfying N,K≤400.

Input

The input is given from Standard Input in the following format:

N K
a_1 a_2 ... a_N

Output

Print the number of the unnecessary cards.

Sample Input 1

3 6
1 4 3

Sample Output 1

1

There are two good sets: {2,3} and {1,2,3}.

Card 1 is only contained in {1,2,3}, and this set without card 1, {2,3}, is also good. Thus, card 1 is unnecessary.

For card 2, a good set {2,3} without card 2, {3}, is not good. Thus, card 2 is NOT unnecessary.

Neither is card 3 for a similar reason, hence the answer is 1.

Sample Input 2

5 400
3 1 4 1 5

Sample Output 2

5

In this case, there is no good set. Therefore, all the cards are unnecessary.

Sample Input 3

6 20
10 4 3 10 25 2

Sample Output 3

3

Solution in LuaJIT (2.0.4) (judge verdict: Memory Limit Exceeded)

local mmi = math.min
local mma = math.max
local n, k = io.read("*n", "*n")
local a = {}
for i = 1, n do
  local at = io.read("*n")
  if at < k then
    table.insert(a, at)
  end
end
n = #a
local function solve()
  if n == 0 then return 0 end
  local tail = {}
  for i = 1, n do
    tail[i] = {}
    for j = 1, k - 1 do
      tail[i][j] = false
    end
  end
  tail[n][a[n]] = true
  local curmax = a[n]
  for i = n - 1, 1, -1 do
    for j = 1, curmax do
      if tail[i + 1][j] then
        tail[i][j] = true
        if j + a[i] < k then
          tail[i][j + a[i]] = true
        end
      end
    end
    curmax = mmi(curmax + a[i], k - 1)
    tail[i][a[i]] = true
  end
  local head = {}
  for i = 1, k - 1 do
    head[i] = false
  end
  local cnt = 0
  curmax = 0
  for i = 1, n - 1 do
    local ai = a[i]
    local need = false
    for j = k - ai, k - 1 do
      for p = 1, j - 1 do
        local q = j - p
        if head[p] and tail[i + 1][q] then
          need = true
          break
        end
      end
      if head[j] or tail[i + 1][j] then
        need = true
      end
      if need then break end
    end
    if not need then cnt = cnt + 1 end
    for j = mmi(curmax, k - 1 - ai), 1, -1 do
      if head[j] then head[j + ai] = true end
    end
    head[ai] = true
    curmax = mmi(curmax + ai, k - 1)
  end
  do -- i == n
    local ai = a[n]
    local need = false
    for j = k - ai, k - 1 do
      if head[j] then
        need = true
        break
      end
    end
    if not need then cnt = cnt + 1 end
  end
  return cnt
end
print(solve())