#define _USE_MATH_DEFINES
#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <complex>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
#include <iterator>
using namespace std;

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

    vector<bool> v(1000, false);
    int ans = 0;
    for(int i=0; i<n; ++i){
        int r;
        cin >> r;
        if(v[r] == false)
            v[r] = true;
        else
            ans += p1 + p2;
    }
    cout << ans << endl;

    return 0;
}