#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>
#include <sstream>
#include <complex>
#include <algorithm>
#include <functional>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <cmath>
#include <cassert>
#include <fstream>
#define REP(i,n) for(int i=0;i<n;i++)
#define FOR(a,b) for(:a<b;a++)
#define SSTR( x ) static_cast< std::ostringstream & >( \
        ( std::ostringstream() << std::dec << x ) ).str()
#define ALL(s) (s).begin(), (s).end()
using namespace std;
typedef long long unsigned int llu;
typedef long long ll;

int main (){
  int p1,p2,n;
  while(cin >> p1 >> p2 >> n){
    vector<int> s;
    int ans = 0;
    REP(i,n){
      int x;
      cin >>x;
      if(find(ALL(s), x) == s.end()){
	s.push_back(x);
      }else{
	ans = ans + p1 + p2;
      }
    }
    s.clear();
    cout << ans << endl;
  }
  return 0;
}