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,i])
for i,v in enumerate(B):
    t.append([C[i]//B[i],10000000+i])

t.sort()
#print(t)

ans = 0
weight = 0
for i in range(len(t)-1,-1,-1):
    tanka,ind = t[i][0],t[i][1]
    if ind >= 10000000:
        ind-=10000000
        omosa = B[ind]
        value = C[ind]
    else:
        omosa = 1
        value = A[ind]

    if weight + omosa <= W:
        weight += omosa
        ans += value
    else:
        if omosa == 1:
            print(ans)
            exit()

print(ans)