import heapq
def cookies(k, A):
    heapq.heapify(A)
    ways =0
    
    while len(A) > 1 and A[0] < k :
        a = heapq.heappop(A) 
        b = heapq.heappop(A) *2
        heapq.heappush(A, (a+b))
        ways +=1

				
        
    if A[0] < k:
        return -1
    return ways