#include <iostream>
using namespace std;
int T,N,x1,y1,x2,y2,x3,y3,r,Ans,Cnt;
int main()
{
cin>>T;
for(int t=0; t<T; t++)
{
Ans=0;
cin>>x1>>y1>>x2>>y2>>N;
for(int y=0; y<N; y++)
{
Cnt=0;
cin>>x3>>y3>>r;
if(r*r>((x1-x3)*(x1-x3)+(y1-y3)*(y1-y3)))Cnt++;
if(r*r>((x2-x3)*(x2-x3)+(y2-y3)*(y2-y3)))Cnt++;
if(Cnt==1) Ans++;
}
cout<<Ans<<endl;
}
}