import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();
        int p1 = sc.nextInt();
        int p2 = sc.nextInt();
        int n = sc.nextInt();
        int count = 0;
        List<Integer> list = new ArrayList<>();
        for(int i = 0 ; i < n; i++) {
            int r = sc.nextInt();
            if(list.contains(r)) {
                count++;
            } else {
                list.add(r);
            }
        }
        System.out.println( count*(p1+p2) );
    }
}