#include <iostream>
using namespace std;
int main()
{
int p, q, n, nrP=0, nrQ=0;
cin >> p >> q >> n;
for (int i=0; i<n; i++)
{
int x; cin >> x;
while(x%p==0)
{
x /= p;
nrP++;
}
while (x%q==0)
{
x /= q;
nrQ++;
}
}
cout << (nrP < nrQ? nrP:nrQ);
return 0;
}