def f(i, scores, peoples):
    result = 0
    for j in range(i, N):
        if (A[j] + scores) // (peoples + 1) < K:
            break
        #print(A[j] + scores, peoples + 1)
        result += 1
        result += f(j + 1, A[j] + scores, peoples + 1)
    return result

N, K, *A = map(int, open(0).read().split())

A.sort(reverse = True)
print(f(0, 0, 0))