import sys
from math import sqrt, pi, sin
inp = lambda : sys.stdin.readline()[:-1]
mii = lambda x = " ": [*map(int,inp().split(x))]
mfi = lambda x = " ": [*map(float,inp().split(x))]
ii = lambda : int(inp())
A = mii()
B = mii()
money = ii()
l = [[A[i], B[i]] for i in range(3)]
l.sort(key = lambda t: t[0])
ans = 0
for price, cnt in l:
if price == 0:
ans += cnt
continue
buy = min(money // price, cnt)
ans += buy
money -= buy * price
print(ans)