#include <iostream>
#include <string>
#include <vector>
using namespace std;

int main() {
    int p1;
    int p2;
    int n;
    cin >> p1 >> p2 >> n;
    int count = 0;
    vector<int> r(n,0);
    int x;
    for(int i = 0;i < n;i++){
        cin >> x;
        bool tf = false;
        for(int j = 0;j < i;j++){
            if(r[j] == x)tf = true;
        }
        if(tf)count++;
        else r[i] = x;
    }
    cout << (p1+p2)*count;
    return 0;
}