R=range
I=lambda:list(map(int,input().split()))
N=I()
B=3000
W=6002
L=[]
S=[]
U=[]
C=[B]
for n in R(3):
	S+=[[0]]
	U+=[[0]]
	L+=[1]
	X=I()
	A={-B:0}
	for x in X:A[-x]=A[-x]+1if -x in A else 1
	for a in sorted(A):
		S[n]+=[S[n][L[n]-1]+A[a]]
		U[n]+=[U[n][L[n]-1]-a*A[a]]
		if n>1:C+=[-a]
		L[n]+=1
X=[]
for x in R(W):
	a=l=0
	r=L[2]
	while l+1<r:
		m=(l+r)//2
		if C[m]>=x-B:l=m
		else:r=m
	X+=[l]
for i in R(L[0]):
	for j in R(L[1]):
		if U[1][j]+B*S[0][i]>=0:
			if S[0][i]<1:m=L[2]-1
			else:
				r=max(0,-(U[1][j]//S[0][i])+B)
				m=[0,X[r]][r<W]
			if m:a=max(a,U[0][i]*S[1][j]+U[1][j]*S[2][m]+U[2][m]*S[0][i])
print(a)