#define _USE_MATH_DEFINES

#include <iostream>		//cin, cout
#include <vector>		//vector
#include <algorithm>	//sort,min,max,count
#include <string>		//string,getline, to_string
#include <cstdlib>		//abs(int)
#include <utility>		//swap, pair
#include <deque>		//deque
#include <climits>		//INT_MAX
#include <bitset>		//bitset
#include <cmath>		//sqrt, ceil. M_PI, pow, sin
#include <ios>			//fixed
#include <iomanip>		//setprecision
#include <sstream>		//stringstream
#include <numeric>		//gcd, assumlate
#include <random>		//randam_device
#include <limits>		//numeric_limits
#include <time.h>       //tm

using namespace std;
constexpr int64_t D_MOD = 1000000007;

int main() {

    int P1, P2, N;
    cin >> P1 >> P2 >> N;

    int afure = 0;
    int temp;

    vector<bool> R(1000);
    for (int i = 0; i < N; i++) {
        cin >> temp;
        if (R.at(temp)) {
            afure++;
        }
        else {
            R.at(temp) = true;
        }
    }

    int ans = afure * P1 + afure * P2;

    cout << ans << endl;

    return 0;

}