For those who use nowadays editor that already handles the input and output, the code is:

def cookies(k, A):
        from heapq import heappop,heappush,heapify

        heapify(A)
        fC = 0
        try:
                while A[0] < k:
                        fC+=1
                        c1 = heappop(A)
                        c2 = heappop(A)
                        newCookie=(1*c1)+(2*c2)
                        heappush(A,newCookie)
                return fC
        except:
                return -1