asdfghjkl

#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("sumsec.in");
ofstream fout("sumsec.out");
int v[100001];
int main()
{
    long long n,d,ok=1,i,s=0,p=-1,u=-1;
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    for(i=1;i<=n;i++)
    {ok=1;
        if(v[i]==0 || v[i]==1)
        ok=0;
    if(v[i]%2==0 && v[i]!=2)
        ok=0;
    for(d=3;d*d<=v[i];d+=2)
        if(v[i]%d==0)

        ok=0;
        if(ok==1)
            {p=i;break;}
        }
        for(i=n;i>=1;i--)

        {
            ok=1;
        if(v[i]==0 ||v[i]==1)
        ok=0;
    if(v[i]%2==0 && v[i]!=2)
        ok=0;
    for(d=3;d*d<=v[i];d+=2)
        if(v[i]%d==0)

        ok=0;
        if(ok==1)
            {u=i;break;}
        }
        for(i=p;i<=u;i++)
            s=s+v[i];
   fout<<s;
    return 0;
}