package yukicoder.No586;

import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		
		int flg[] = new int[1000];
		Arrays.fill(flg, 0);
		
		int P1 = in.nextInt();
		int P2 = in.nextInt();
		int N = in.nextInt();
		int cost = 0;
		for (int i = 0; i < N; i++) {
			int R = in.nextInt();
			if (flg[R] != 0) {
				cost += P1+P2;
			}
			flg[R] = 1;
		}
		System.out.println(cost);
	}
}