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 C (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <stdio.h>

void swap(unsigned *num1, unsigned *num2)
{
	int swp = *num1;
	*num1 = *num2;
	*num2 = swp;
}

void sort(unsigned a[5000], unsigned n)
{
	unsigned i, p;
	
	for(i=0; i<n; i++){
		for(p=n-1; 0<p; p--){
			if(a[p-1] > a[p])
				swap(&a[p-1], &a[p]);
			if(p == i)
				break;
		}
	}
}

int main(void)
{
	unsigned n, k;
	unsigned card[5000];
	unsigned sum = 0;
	unsigned ans = 0;
	unsigned i;
	
	//データ読み込み
	scanf("%u %u", &n, &k);
	for(i=0; i<n; i++){
		scanf("%u", &card[i]);
		sum += card[i];
	}
	
	/*----全カードの総和がk未満→全て不必要( END )----*/
	/*----  全カードの総和がk  → 全て必要( END ) ----*/
	if(sum < k){
		printf("%u\n", n);
		
		return 0;
	}
	else if(sum == k){
		printf("0\n");
		
		return 0;
	}
	
	sort(card, n);	/* 値が大きい順にソート */
	sum = 0;		/* 初期化 */
	
	//値がk以上のカードは必要
	//総和がk以上になった番数(i)までの集合→i番目以降のカードは必要
	for(i=0; (sum<k&&i<n); i++){
		if(card[i] < k)
			sum += card[i];
		else
			break;
	}
	n = i;	/* iをnに代入 */
	
	/*----番数(i)までの集合の総和がk未満
							→i番目以下のカードは不必要( END )----*/
	if(sum < k){
		printf("%u\n", n);
		
		return 0;
	}
	
	//不必要なカードを取り出す
	for(i=0; i<n; i++){
		if(k <= sum-card[i]){
			sum -= card[i];
			ans++;
		}
		else
			break;
	}
	
	/* 取り出したカードの枚数を出力( END ) */
	printf("%u\n", ans);
	
	
	return 0;
}