// #define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
int main() {
    // Input
    int P1, P2, N;
    cin >> P1 >> P2 >> N;
    vector<int> R(N);
    rep(i, N) cin >> R[i];

    // Calculate Losses
    set<int> book;
    int ans = 0;
    rep(i, N) {
        if (!book.count(R[i])) book.insert(R[i]);
        else ans += P1 + P2; 
    }

    // Output
    cout << ans << endl;
}