#include <iostream>
#include <vector>
#include <algorithm>
#include <limits>
#include <numeric>
#include <cstring>
#include <string>
#include <queue>
#include <set>
#include <cmath>
#include <fstream>
#include <cstdlib>
#include <map>
#define pb push_back
#define mp make_pair
#define INF numeric_limits<int>::max()
#define bit(x) (-x)&x
#define int64 long long
using namespace std;
ifstream in("dtcsu.in");
ofstream out("dtcsu.out");
set<int64> s;
int main()
{
    for(int i=1;i<=276997;i++)
    {
        int64 x;
        in>>x;
        while(x%2==0)x/=2;
        s.insert(x);
    }
    int t,sol=0;
    for(in>>t;t;t--)
    {
        int64 x;
        while(x%2==0)x/=2;
        sol+=(s.find(x)!=s.end());
    }
    out<<sol<<'\n';
    return 0;
}