#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
typedef long long int ll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<vvl> vvvl;
typedef vector<vvvl> vvvvl;
typedef vector<bool> vb;
typedef vector<vb> vvb;
typedef vector<vvb> vvvb;
typedef vector<vvvb> vvvvb;
typedef pair<ll,ll> pl;
typedef pair<ll,pl> ppl;
typedef pair<ll,ppl> pppl;
typedef pair<ll,pppl> pppppl;
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define rrep(i,a,b) for(int i=(b)-1;i>=(a);i--)
#define all(a) begin(a),end(a)
#define sz(a) (int)(a).size()
#define F first
#define S second
#define bs(A,x) binary_search(all(A),x)
#define lb(A,x) (ll)(lower_bound(all(A),x)-A.begin())
#define ub(A,x) (ll)(upper_bound(all(A),x)-A.begin())
#define cou(A,x) (ll)(upper_bound(all(A),x)-lower_bound(all(A),x))
template<typename T>using min_priority_queue=priority_queue<T,vector<T>,greater<T>>;
template<class T>bool chmax(T&a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T>bool chmin(T&a,T b){if(b<a){a=b;return 1;}return 0;}
//*
using mint=modint998244353;
const ll mod=998244353;
//*/
/*
using mint=modint1000000007;
const ll mod=1000000007;
//*/
//using mint=modint;
//*
typedef vector<mint> vm;
typedef vector<vm> vvm;
typedef vector<vvm> vvvm;
typedef vector<vvvm> vvvvm;
ostream&operator<<(ostream&os,mint a){os<<a.val();return os;}
istream&operator>>(istream&is,mint&a){int x;is>>x;a=mint(x);return is;}
//*/
template<typename T1,typename T2>ostream&operator<<(ostream&os,pair<T1,T2>p){os<<p.F<<" "<<p.S;return os;}
template<typename T1,typename T2>istream&operator>>(istream&is,pair<T1,T2>&p){is>>p.F>>p.S;return is;}
template<typename T>ostream&operator<<(ostream&os,vector<T>v){rep(i,0,sz(v))os<<v[i]<<(i+1!=sz(v)?" ":"");return os;}
template<typename T>istream&operator>>(istream&is,vector<T>&v){for(T&in:v)is>>in;return is;}
int main(){
  cin.tie(0)->sync_with_stdio(0);
  cin.exceptions(cin.failbit);
  ll NA,NB,NC;cin>>NA>>NB>>NC;
  vl A(NA),B(NB),C(NC);
  cin>>A>>B>>C;
  sort(all(A));reverse(all(A));
  sort(all(B));reverse(all(B));
  sort(all(C));reverse(all(C));
  vl AA(sz(A)+1),BB(sz(B)+1),CC(sz(C)+1);
  rep(i,0,sz(A))AA[i+1]=AA[i]+A[i];
  rep(i,0,sz(B))BB[i+1]=BB[i]+B[i];
  rep(i,0,sz(C))CC[i+1]=CC[i]+C[i];
  auto f=[&](ll x,ll y,ll z){return AA[x]*y+BB[y]*z+CC[z]*x;};
  ll ans=0;
  rep(i,0,sz(A)+1)chmax(ans,f(i,sz(B),0));
  rep(i,0,sz(B)+1)chmax(ans,f(0,i,sz(C)));
  rep(i,0,sz(C)+1)chmax(ans,f(sz(A),0,i));
  vl MA=A;
  rep(i,0,sz(A))MA[i]*=-1;
  rep(i,0,sz(B)){
    ll j=i;
    while(i<sz(B)&&B[i]==B[j])i++;
    rep(z,1,sz(C)+1)if(z==sz(C)||C[z]!=C[z-1]){
      ll y=i,x=ub(MA,CC[z]/y);
      chmax(ans,f(x,y,z));
    }
    i--;
  }
  cout<<ans<<endl;
  return 0;
}