#include <fstream>
#include <unordered_set>

using namespace std;

ifstream fin("dtcsu.in");
ofstream fout("dtcsu.out");

unordered_set <long long> h;

int main()
{
    int t=276997;
    long long sol=0, n;
    while(t--)
    {
        fin>>n;
        if(n&1LL) h.insert(n);
    }
    fin>>t;
    while(t--)
    {
        fin>>n;
        if(n&&h.find(n/(n&(-n)))!=h.end()) sol++;
    }
    fout<<sol;
    fin.close();
    fout.close();
}