pb15XI2018

#include <iostream>

using namespace std;// ||

int main() {

unsigned long n,nr,i=1,d,eprim,S,aparitii;
S=0;
i=1;
aparitii=0;
cout<<"n=";cin>>n;

while (i<=n)
{
    d=2;
    eprim=1;
    cout<<"nr"<<i<<'=';cin>>nr;
    while (d<=nr/2&&eprim==1)
    {
        if (nr%d==0)
        eprim=0;
            d++;

    }
    if (eprim) {

         aparitii++;
        S+=nr;
}
i++;
}
long med=S/aparitii;
   cout<<"media nr prime e: "<<med;

return 0;
}