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

namespace
{
bool b[ 1000 ];
}

int main()
{
int i;
int P;
int P1;
int P2;
int N;
int R;
int iSum;

	cin >> P1;
	cin >> P2;
	cin >> N;

	P = P1 + P2;
	iSum = 0;
	for( i = 0; i < N; i++ )
	{
		cin >> R;
		if( b[ R ] )
			iSum += P;
		else
			b[ R ] = true;
	}

	cout << iSum << endl;

	return 0;
}