score=list(map(int,input().split()))
lst=list(map(int,input().split()))
check=[]
for i in range(4):
    check.append((lst[i],score[i]))
check.sort()
time=lst[-1]
ans=0
for i in range(4):
    lst,score=check[i]
    if time>=score*lst:
        time-=score*lst
        ans+=score
    else:
        ans+=time//(lst)
        print(ans)
        exit()
print(ans)