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

int main() {
  int P1, P2, N; cin >> P1 >> P2 >> N;
  int ans = 0;
  map<int, int> mp;
  for(int i = 0; i < N; i++){
    int R; cin >> R;
    mp[R]++;
    if(mp[R] != 1) ans += P1 + P2;
  }
  cout << ans << endl;
}