Is prime

#include <iostream>
using namespace std;
#define ll long long
void Isprime(ll x){
    int e=0;
    if (x%2==0){
        cout<<"Is not Prime";
    }
    else {
        for (int i=3; i*i<=x; i++){
            if (x%i==0) e=1;
        }
        if (e==0) cout<<"Is Prime";
        else {
            cout<<"Is not Prime";
        }
    }
}
int main()
{
    ll n;
    cin>>n;
    Isprime(n);
}