#include<bits/stdc++.h>
using namespace std;

bool iz[1'000'004];

int main ()
{
    freopen("dodgeball2.in", "r", stdin);
    freopen("dodgeball2.out", "w", stdout);

    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    long long n;
    cin>>n;

    long long br[3]={};

    cin>>br[1]>>br[2];

    vector<pair<pair<long long, long long>, long long>>v;

    for (long long i=1; i<=n; i++)
    {
        long long x;
        cin>>x;
        v.push_back({{x, i}, 1});
    }
    for (long long i=1; i<=n; i++)
    {
        long long x;
        cin>>x;
        v.push_back({{x, i}, 2});
    }

    sort(v.begin(), v.end(), greater<>());
    long long ans=0;

    for (long long i=0; i<v.size(); i++)
    {
        if (iz[v[i].first.second]) continue;

        if (br[v[i].second]==0) continue;

        br[v[i].second]--;
        ans+=v[i].first.first;
        iz[v[i].first.second]=true;
    }

    cout<<ans<<endl;
    return 0;
}