#include <iostream>
#include <stdio.h>
#include <algorithm>
#include <math.h>
using namespace std;


int main(void)
{
    int p1, p2, n;
    cin >> p1 >> p2 >> n;
    int r[n];
    int c = 0;
    for(int i = 0; i < n; i++)
        cin >> r[i];
    
    for(int i = 0; i < n-1; i++)
        for(int j = i+1; j < n; j++)
        {
            if(r[i]==0)
                break;
            if(r[i]==r[j])
            {
                c++;
                r[j] = 0;
            }
        }
    cout << c*(p1+p2);
    return 0;
}