#include <iostream>
#include <cmath>
using namespace std;
bool isPrime(int n) {
if (n < 2) {
return false;
}
for (int i = 2; i <= sqrt(n); i++) {
if(n % i == 0) {
return false;
}
}
return true;
}
int main() {
int n = 7;
bool result = isPrime(n);
if (result) {
cout << n << " is prime" << endl;
} else {
cout << n << " is not prime" << endl;
}
return 0;
}