#include <iostream>
#include <set>
using namespace std;

int main() {
  int P1, P2, N;
  cin >> P1 >> P2 >> N;

  set<int> s;
  int loss = 0;
  for (int i = 0; i < N; i++) {
    int R;
    cin >> R;

    if (s.count(R) != 0) {
      loss += P1 + P2;
      continue;
    }

    s.insert(R);
  }

  cout << loss << endl;

  return 0;
}