package m.shin;
import java.util.ArrayList;
import java.util.Scanner;
public class Doublebooking {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner s = new Scanner(System.in);
		int P1 = s.nextInt();
		int P2 = s.nextInt();
		int N = s.nextInt();
		int c = 0;
		ArrayList<Integer> roomnumber = new ArrayList<>();
		for(int i = 0;i < N;i++){
			int r = s.nextInt();
			if(roomnumber.contains(r)){
				c++;
			}else{
				roomnumber.add(r);
			}
		}
		s.close();
		System.out.println(c*(P1+P2));

	}

}