import java.util.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		int a = sc.nextInt();
		int b = sc.nextInt();
		int[] ints = new int[1000];
		int n = sc.nextInt();
		int sum = a + b;
		int ans = 0;
		for (int i=0; i<n; i++) {
			int temp = sc.nextInt();
			if (ints[temp]==1) {ans += sum;}
			else {ints[temp]++;}
		}
		System.out.println(ans);
	}
}