#include <iostream>

#include <cmath>

using namespace std;

int _gcd(int x,int y){

return y==0?x:_gcd(y,x%y);

}

void main()

{

int T,x0,y0,n;

cin>>T;

while(T--)

{

cin>>x0>>y0;

cin>>n;

int x1=0,y1=0;

for(int i=0;i<n;i++)

{

int x2,y2;

cin>>x2>>y2;

x1+=x2;

y1+=y2;

}

x1-=x0*n;

y1-=y0*n;

if(x1==0&&y1==0)

cout<<0<<' '<<0<<endl;

else if(x1==0&&y1!=0)

cout<<0<<' '<<y1<<endl;

else if(x1!=0&&y1==0)

cout<<x1<<' '<<0<<endl;

else if(x1!=0&&y1!=0)

{

int gcd=_gcd(abs(x1),abs(y1));

cout<<x1/gcd<<' '<<y1/gcd<<endl;

}

}

}