P1 ian

#include <iostream>
#include <cmath>
using namespace std;

int main() {

unsigned long n,x,i,d,eprim,S=0,f;
cout<<"n=";cin>>n;

for (i=1;i<=n;i++)
{
    cin>>x;
    f=2;eprim=1;
    while (1)
    {
     for (d=2;d<=sqrt(f)&&eprim;d++)
        if (f%d==0)
            eprim=0;

        if (eprim&&x%f==0)
        {
            S+=f;
            break;
        }
        f++;
    }

}

cout<<"S="<<S;

 return 0;
}