#include<stdio.h>
int isprime(int num) {
    if(num < 2)
    return 0;
    for (int i =2; i <= num / 2; i++) {
        if (num % i == 0)
        return 0;
    }
    return 1;
}
int main() {
    int n;
    scanf("%d", &n);
    if(n < 1||n>10){
        printf("Invalid input");
        return 0;
    }
    int arr[20], i, sum = 0, found =0;
    for(i = 0; i< n; i++) {
        scanf("%d", &arr[i]);
    }
    for(i = 0; i < n; i++) {
        if(isPrime(arr[i])) {
            sum += arr[i];
            found = 1;
        }
    }
    if(found)
    printf("%d", sum);
    else
    printf("Invalid Input");
    return 0;
}