#include <bits/stdc++.h>
#define rep(i,n) for(int i=0; i<(int)(n); i++)

using namespace std;
using LL = long long;
const LL mod = 1e9 + 7;
const int Max_N = 100;
const int Max_K = 100;
const int Max_A = 100;

int main(){
	int N, K;
	cin >> N >> K;
	vector<int> A(N);
	rep(i,N) cin >> A[i];
	if(N > 20){
		cout << 0 << endl;
		return 0;
	}
	int ans = 0;
	rep(bit,1<<N){
		int num = 0, res = 0;
		rep(i,N) if(bit & (1<<i)) num++, res += A[i];
		if(res >= num * K) ans++;
	}

	cout << ans - 1 << endl;

	return 0;
}