#include <iostream>
using namespace std;
int main()
{
long n;
cout << "n= ";cin>>n;
long v[n+1];
for(int i=1; i<= n ;i++)
{
cout << v << " [" << i << "]= " ; cin >>v[i];
}
if (v[1] % 2 == 0 && v[n] %2 == 1)
for(int i=1; i <= n;i += 5)
cout<< v[i] << ' ';
return 0;
}