from decimal import Decimal,getcontext

#小数点何桁まで精度を持たせたいか設定

getcontext().prec = 100

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):
    t.append([v,1,v])
for i,v in enumerate(B):
    t.append([Decimal(C[i])/Decimal(B[i]),B[i],C[i]])

t.sort()
#print(t)

ans = 0
weight = 0
while t:
    tanka,omosa,value = t.pop()
    if weight + omosa <= W:
        weight += omosa
        ans += value

print(ans)