// editor2
#include <stdio.h>
int isPrime(int num){
    if (num <= 1) return 0;
    for(int i = 2; i * i <= num; i++){
        if(num % i == 0)return 0;
    }
    return 1;
}
int main(){
    int n;
    if(scanf("%d", &n) !=1 || n < 1 || n > 10){
        printf("Invalid Input\n");
        return 1;
    }
    int arr[n];
    int sum = 0;
    int countPrimes = 0;
    if(scanf("%d %d %d %d %d %d %d %d %d %d", &arr[0], &arr[1] , &arr[2] , &arr[3],&arr[4],&arr[5],&arr[6],&arr[7],&arr[8],&arr[9] != n){
        printf("Invalid Input\n");
        return 1;
    }
    for (int i=0;i<n;i++){
        if(arr[i] < 1 || arr[i] > 100){
            printf("Invalid Input\n");
            return 1;
        }
        if(isPrime(arr[i])){
            sum += arr[i];
            countPrimes++;
        }
    }
    if(countPrimes == 0){
        printf("Invalid Input\n");
    } else {
        printf("%d\n", sum);
    }
    return 0;
}