#include <stdio.h> 
#include <stdbool.h> 
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; 
    if (scanf("%d", &n) != 1 || n < 1 || n > 10) { 
        printf("Invalid Input\n");
        return 1;
    }

    int arr;
    int sum_of_primes = 0;
    bool prime_found = false; 
    for (int i = 0; i < n; i++) {
        if (scanf("%d", &arr[i]) != 1 || arr[i] < 1 || arr[i] > 100) {
            printf("Invalid Input\n");
            return 1; 
        }
        if (isPrime(arr[i])) {
            sum_of_primes += arr[i]; 
            prime_found = true; 
        }
    }

    if (prime_found) {
        printf("%d\n", sum_of_primes); 
    } else {
        printf("Invalid Input\n"); 
    }

    return 0;
}