from heapq import heappop,heappush
N,M,W = map(int,input().split())
A = list(map(int,input().split()))
B = list(map(int,input().split()))
C = list(map(int,input().split()))

t = []
for i,v in enumerate(A):
    heappush(t,(-v,-v,1))

for i,v in enumerate(B):
    heappush(t,(-(C[i]//B[i]),-C[i],B[i]))

ans = 0
weight = 0

while t:
    tanka,value,omosa = heappop(t)
#    print("tanka",tanka,"omosa",omosa,"value",value)
    if weight + omosa <= W:
        weight += omosa
        ans += value*(-1)

print(ans)