#include <bits/stdc++.h>
#define ALL(a) (a).begin(), (a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define pb push_back
#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define rep(i, n) FOR(i, 0, n)
#define ll long long
using namespace std;

const ll P = 1000000007;
int gcd(int a, int b) { return b != 0 ? gcd(b, a % b) : a; }
int lcm(int a, int b) { return a / gcd(a, b) * b; }

int main()
{
  cout << fixed << setprecision(10);
  int P1,P2,N;
  cin >> P1 >> P2 >> N;
  vector<int> R(N);
  rep(i,N)
  {
    cin >> R[i];
  }
  int count = 0;
  rep(i,N)
  {
    for(int j=0;j<i;j++)
    {
      if(R[i]==R[j])
      {
        count ++;
      }
    }
  }
  cout << count*(P1+P2) << endl;
  return 0;
}