#include<bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define reps(i,s,n) for(int i=(int)(s);i<(int)(n);i++)
const ll mod = 1e9 + 7;
const int INF = 1e9;

int main() {
	cin.sync_with_stdio(false);
	int p1, p2;
	cin >> p1 >> p2;
	int N;
	cin >> N;
	bool r[1000] = {};
	int ans = 0;
	rep(i, N) {
		int R;
		cin >> R;
		if (r[R] == true)ans += p1 + p2;
		else r[R] = true;
	}
	cout << ans << endl;
	return 0;
}