#include "bits/stdc++.h"
using namespace std;
using ll = long long;
#define rep(i, m, n) for (ll i = m; i < n; i++)
#define Endl endl
vector<ll> sa, sb, sc;
ll A, B, C;
ll f(ll s, ll t, ll u)
{
    return sa[s] * t + sb[t] * u + sc[u] * s;
}
ll g(ll i, ll j)
{
    ll sub = -1e18;
    if (f(i, j, C - 1) <= f(i, j, C))
        sub = max(sub, f(i, j, C));
    else if (f(i, j, 0) > f(i, j, 1))
        sub = max(sub, f(i, j, 0));
    else
    {
        ll l = 0;
        ll r = C - 1;
        while (r - l > 1)
        {
            ll search = l + (r - l) / 2;
            if (f(i, j, search) <= f(i, j, search + 1))
                l = search;
            else
                r = search;
        }
        sub = max(sub, f(i, j, r));
    }
    return sub;
}
ll h(ll i)
{
    ll ans=-1e18;
    if (g(i, 0) > g(i, 1))
        ans = max(ans, g(i, 0));
    else if (g(i, B - 1) < g(i, B))
        ans = max(ans, g(i, B));
    else
    {
        ll l = 0;
        ll r = B - 1;
        while (r - l > 1)
        {
            ll search = l + (r - l) / 2;
            if (g(i, search) <= g(i, search + 1))
                l = search;
            else
                r = search;
        }
        ans = max(ans, g(i, r));
    }
    return ans;
}
int main()
{
    cin >> A >> B >> C;
    vector<ll> a(A), b(B), c(C);
    rep(i, 0, A) cin >> a[i];
    rep(i, 0, B) cin >> b[i];
    rep(i, 0, C) cin >> c[i];
    sort(a.begin(), a.end());
    sort(b.begin(), b.end());
    sort(c.begin(), c.end());
    reverse(a.begin(), a.end());
    reverse(b.begin(), b.end());
    reverse(c.begin(), c.end());
    sa.push_back(0);
    sb.push_back(0);
    sc.push_back(0);
    rep(i, 0, A)
    {
        sa.push_back(sa[i] + a[i]);
    }
    rep(i, 0, B)
    {
        sb.push_back(sb[i] + b[i]);
    }
    rep(i, 0, C)
    {
        sc.push_back(sc[i] + c[i]);
    }
    ll ans = -1e18;
    if(h(0)>h(1))ans=max(ans,h(0));
    else if(h(A-1)<=h(A))ans=max(ans,h(A));
    else {
        ll l=0;
        ll r=A-1;
        while(r-l>1){
            ll search=l+(r-l)/2;
            if(h(search)<=h(search+1))l=search;
            else r=search;
        }
        ans=max(ans,h(r));
    }
    cout << ans << endl;
}