#include <iostream>
#include <math.h>
#include <algorithm>
#include <functional>
#include <vector>
#include <typeinfo>
#include <climits>
#include <ctype.h>
#include <string>
#include <stdio.h>
using namespace std;
#define INIT cin.tie(0); ios::sync_with_stdio(false);
#define FOR(i, a, n) for (int i = a; i < n; i++)
#define REP(i, n) for(int i = 0; i < n; i++)

int main()
{
    INIT;

    int p1, p2, n;
    cin >> p1 >> p2 >> n;
    int R[n];
    REP(i, n) cin >> R[i];

    int p = p1 + p2;
    vector<int> v;
    int f;
    REP(i, n){
        f = 0;
        REP(j, v.size()){
            if(R[i] == v[j]){
                f = 1;
                break;
            }
        }
        if(f == 0) v.push_back(R[i]);
    }
    int cnt, total = 0;
    REP(i, v.size()){
        cnt = 0;
        REP(j, n){
            if(v[i] == R[j]) cnt++;
        }
        if(cnt >= 2) total += p * (cnt - 1);
    }
    cout << total << endl;


    return 0;
}