import sys

# sys.setrecursionlimit(200005)
# sys.set_int_max_str_digits(200005)
int1 = lambda x: int(x)-1
pDB = lambda *x: print(*x, end="\n", file=sys.stderr)
p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr)
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()

dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
# inf = -1-(-1 << 31)
inf = -1-(-1 << 63)
# md = 10**9+7
md = 998244353

def cumsum(aa):
    cs = [0]
    for a in aa: cs.append(cs[-1]+a)
    return cs

def f(i, j, k):
    return sa[i]*j+sb[j]*k+sc[k]*i

na, nb, nc = LI()
aa = LI()
bb = LI()
cc = LI()
aa.sort(reverse=True)
bb.sort(reverse=True)
cc.sort(reverse=True)

sa = cumsum(aa)
sb = cumsum(bb)
sc = cumsum(cc)

def score(i,j):
    l,r=0,nc
    while 1:
        if l+1==r:
            return max(f(i,j,l),f(i,j,r))
        if l+2==r:
            m=(l+r)//2
            return max(f(i,j,l),f(i,j,m),f(i,j,r))
        m1=(l*2+r)//3
        m2=(l+r*2)//3
        if f(i,j,m1)>f(i,j,m2):
            r=m2
        else:
            l=m1

def search(i):
    l,r=0,nb
    while 1:
        if l+1==r:
            return max(score(i,l),score(i,r))
        if l+2==r:
            m=(l+r)//2
            return max(score(i,l),score(i,m),score(i,r))
        m1=(l*2+r)//3
        m2=(l+r*2)//3
        if score(i,m1)>score(i,m2):
            r=m2
        else:
            l=m1

ans=0
for i in range(na+1):
    ans=max(ans,search(i))

print(ans)