#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,x, sum = 0, found = 0;
     scanf("%d", &n);
     
     if (n < 1 || n > 10)
     {
         printf("Invalid Input\n");
         return 0;
     }
     for (int i = 0; i < n; i++)
     {
         scanf("%d", &x);
         if(x < 1 || x > 100) continue;
         if (isprime(x)){
             sum += x;
             found = 1;
         }
     }
     if (found)
     printf("%d\n", sum);
     else
     printf("Invalid Input\n");
     
     return 0;
 }