#include <iostream>

int main() {
    using namespace std;
    int p1, p2, n;
    cin >> p1 >> p2 >> n;
    bool r[1000] = {};
    int duplicate_num = 0;
    for (int i = 0; i < n; i++) {
        int tmp;
        cin >> tmp;
        if (r[tmp]) {
            duplicate_num++;
        } else {
            r[tmp] = true;
        }
    }
    cout << duplicate_num * (p1 + p2) << std::endl;
}