A = list(map(int, input().split()))
B = list(map(int, input().split()))
T = B[4]
B = B[:4]
AB = list(zip(A, B))
AB.sort(key=lambda x: -x[1])
# print(AB)
remain = T
cnt = 0
while remain > 0 and len(AB) > 0:
    a, b = AB.pop()
    num = min(a, remain // b)
    cnt += num
    remain -= num * b
print(cnt)