#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;

int main(){
    int x, y, n, cnt = 0;
    cin >> x >> y >> n;
    vector<int> v(n);
    for (int i = 0; i < n; i++) cin >> v[i];
    for (int i = 0; i < n-1; i++){
        for (int j = i+1; j < n; j++){
            if (v[i] == v[j]) cnt++;
            break;
        }
    }
    cout << cnt * (x + y) << endl;
}