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

signed main() {
int A, B, N;
cin >> A >> B >> N;

vector<int> R(1000);
int ans = 0;
int C;
for( int i = 0; i < N; i++ ){
cin >> C;
if( R.at(C) == 0 ) R.at(C)++;
else{
ans += A+B;
}
}

cout << ans << endl;

}