#include<stdio.h>
int isprime(int n){
    if(n < 2) return 0;
    for (int i = 2; i * i <= n; i++){
     if (n % i == 0) return 0;
     
    }
     return 1;
}
 int main() {
     int n;
     scanf("%d", &n);
     if (n < 1 || n > 10)
     {
         printf("Invalid Input\n");
         return 0;
     }
     int arr[n];
     for (int i=0;i<n;i++)
     {
         scanf("%d", &arr[i]);
     }
     int sum = 0;
         if(x < 1 || x > 100) continue;
         if (isprime(arr[i])){
             sum += x;
             found = 1;
         }
     }
     if (found)
     printf("%d\n", sum);
     else
     printf("Invalid Input\n");
     
     return 0;
 }