#include<bits/stdc++.h>
#define rep(i,a,n) for (int i = a;i < n;i++)
#define per(i,n,a) for (int i = n-1;i >= a;i--)
using namespace std;

int p1,p2,n,ans;
int main() {
    cin >> p1 >> p2 >> n;

    set<int> used;
    rep(i, 0, n) {
        int r; cin >> r;
        if (used.count(r)){
            ans += p1 + p2;
        }else{
            used.insert(r);
        }
    }
    cout << ans << endl;
}