#include <stdio.h>

int main(){
    int pay1, pay2;
    int N, i, num;
    int room[1000] = {0};
    int money = 0;

    scanf("%d%d%d\n", &pay1, &pay2, &N);
    for(i = 0; i < N; i++){
        scanf("%d", &num);
        room[num]++;
        if(room[num] > 1){
            money += pay1 + pay2;
            room[num]--;
        }
    }
    printf("%d\n", money);

    return 0;
}