#include <stdio.h>

int main(void) {
  int P1,P2,N;
  int R[100];
  do {
    scanf("%d", &P1);
  } while (P1<1 || P1>100000);

  do {
    scanf("%d", &P2);
  } while(P2<1 || P2>100000);

  do {
    scanf("%d", &N);
  } while(N<1 || N>100);

  int i,j;
  int cnt = 0;
  for(i=0;i<=N-1;i++) {

    do {
      scanf("%d", &R[i]);
    } while(R[i]<1 || R[i]>999);

    for(j=0;j<=i-1;j++){
      if(R[i] == R[j]){
	cnt++;
	break;
      }
    }
  }
  printf("%d\n", (P1+P2)*cnt);

  return 0;
}