Elementele unui vector care au suma cifrelor număr prim

#include <iostream>
using namespace std;

int sumaCifre(int x) {
    int s = 0;
    while (x > 0) {
        s += x % 10;
        x /= 10;
    }
    return s;
}

bool prim(int x) {
    if (x < 2) return false;
    for (int d = 2; d * d <= x; d++)
        if (x % d == 0) return false;
    return true;
}

int main() {
    int n, v[101];
    cin >> n;
    for (int i = 0; i < n; i++)
        cin >> v[i];

    bool gasit = false;
    for (int i = 0; i < n; i++)
        if (prim(sumaCifre(v[i]))) {
            cout << v[i] << ' ';
            gasit = true;
        }

    if (!gasit) cout << "NU EXISTA";
    return 0;
}