#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <stack>
#include <algorithm>
#include <string>
#include <map>
#include <iterator>
#include <set>
#include <queue>
#include <bitset>
#include <cassert>

using namespace std;

int main() {

    int P1, P2;
    cin >> P1 >> P2;
    int N;
    cin >> N;
    vector<bool> vs(1000, false);
    long res = 0;
    for (int i = 0; i < N; ++i) {
        int R;
        cin >> R;
        if (vs[R]) {
            res += P1 + P2;
        } else {
            // reserve
            vs[R] = true;
        }
    }
    cout << res << endl;

    return 0;
}