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((C[i]//B[i],B[i],C[i]))

t.sort()
#print(t)

ans = 0
weight = 0
for i in range(len(t)-1,-1,-1):
    omosa,value = t[i][1],t[i][2]
    if weight + omosa <= W:
        weight += omosa
        ans += value
    else:
        if omosa == 1:
            print(ans)
            exit()

print(ans)