R, P, Q = map(int, input().split())
a, b, c, d = map(int, input().split())
li = [a, b, c, 5 * 10 ** 11]
li.sort()
ans = 0
for k in range(4):
    num = R // (P + Q * k)

    point = li[k]
    if(num >= point and point * k <= d):
        li[0], li[1], li[2], li[3] = li[0] - point, li[1] - point, li[2] - point, li[3] - point
        ans += point
        d -= point * k
        R -= point * (P + Q * k)
    else:
        if(k == 0):
            min_people = R // P
        else:
            min_people = min(R // (P + Q * k), d // k)
        print(ans + min_people)
        break