#include <iostream>
using namespace std;
int n, x, d, nr = 0, nrdiv, i;
int main()
{
cin >> n;
for (int i = 1 ; i <= n; i++)
{
cin >> x;
nrdiv = 0;
for (d = 2; d * d <= x; d++)
{
if (x % d == 0 && nrdiv == 0)
{
x = x / d;
nrdiv++;
}
if (x == d)
nrdiv++;
}
for (d = 2; d * d <= x; d++)
{
if (x % d == 0 && nrdiv == 1)nrdiv++;
}
if (nrdiv == 1)
nr++;
}
cout << nr;
return 0;
}