#include <bits/stdc++.h>
using namespace std;

string file = "economie";
ifstream fin(file + ".in");
ofstream fout(file + ".out");

bitset <50001> b;
int n, v[1001];

int main() {

    fin >> n;

    for (int i = 1; i <= n; i++)
        fin >> v[i];

    sort(v + 1, v + n + 1);
    int nr = 0;

    for (int i = 1; i <= n; i++) {

        if (b[v[i]] || v[i] == v[i - 1])
            continue;
        nr++;

        b[v[i]] = true;
        int j = v[i];
        while (j <= 50000)
            b |= (b << j), j += v[i];
    }

    fout << nr;

    return 0;
}