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

int main() {
  int P1, P2, N, R;
  cin >> P1 >> P2 >> N;
  vector<int> V(1000);
  int ans = 0;
  while (cin >> R) {
    if (V.at(R)) ans += P1 + P2;
    V.at(R)++;
  }
  cout << ans << "\n"; 
}