#include <iostream>

using namespace std;

void Divizeaza(int s, int d, int &m)
{
    m=(s+d)/2;
}
int ecuatie(int a,int b,int c,int nr)
{
    return a*nr*nr+b*nr+c;
}


void Dei(int v[100],int s,int d,int a,int b, int c,int &z)
{
    int m;
    if(s<d)
    {
        Divizeaza(s,d,m);
        Dei(v,s,m,a,b,c,z);
        Dei(v,m+1,d,a,b,c,z);
    }
    else
        if(ecuatie(a,b,c,v[s])==0)
            z++;

}

int main()
{
    int v[100],n,z=0,a,b,c;
    cout<<"a=";cin>>a;
    cout<<"b=";cin>>b;
    cout<<"c=";cin>>c;
    cout<<"n=";cin>>n;
    for(int i=0;i<n;i++)
        cin>>v[i];
    Dei(v, 0, n-1,a,b,c,z);
   cout<<z;
    return 0;
}