#include <bits/stdc++.h>
using namespace std;

int main() {
	int p1, p2, n;
	cin >> p1 >> p2 >> n;

	int c = 0;
	vector<int> v(n, 0);
	for (int i = 0; i < n; i++) {
		int x;
		cin >> x;

		int r = count(v.begin(), v.end(), x);
		if (r) {
			c++;
		}
		else {
			v.push_back(x);
		}
	}

	cout << (p1 + p2) * c << endl;
}