#include <stdio.h>
#include <stdbool.h>
number is prime;
bool isPrime(int num) {
    if (num <= 1) return false;
    for (int i = 2; i * i <= num; i++) {
        if (num % i == 0)
            return false;
    }
    return true;
}

int main() {
    int n;
    scanf("%d", &n);

    if (n < 1 || n > 10) {
        printf("Invalid Input");
        return 0;
    }

    int arr[n];
    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    int sum = 0, found = 0;

    for (int 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;
}