#include <stdio.h>

int main (void){
	int a,b,c,n; int r[100],e[999]={0};
	scanf("%d%d%d",&a,&b,&n);
	for(int i = 0;i < n;i++) scanf("%d",&r[i]);

	for(int i = 0;i < n;i++){
		if(e[r[i]] == 0)e[r[i]] = 1;
		else c++;
	}
	printf("%d",(a+b)*c);

	return(0);
}