// हर हर महादेव
using namespace std;
#include <bits/stdc++.h>
#define int long long int
int solve(vector<pair<int,int>> &a){
if(a.empty()){
return 0;
}
int n = a.size();
for(auto &[x,y] : a){
x = abs(x);
y = abs(y);
}
sort(a.begin(),a.end(),[&](const auto &v1,const auto &v2){
auto [x1,y1] = v1;
auto [x2,y2] = v2;
if(x1*y2 != x2*y1){
return x1*y2 < x2*y1;
}
return x1*x1 + y1*y1 < x2*x2 + y2*y2;
});
int ans = 1;
for(int i = 1; i < n; i++){
auto [x1,y1] = a[i];
auto [x2,y2] = a[i-1];
if(x1*y2 != x2*y1){
ans++;
}
}
return ans;
}
void testcase(){
int n;
cin >> n;
vector<pair<int,int>> a(n);
for(int i = 0; i < n; i++){
cin >> a[i].first >> a[i].second;
}
bool sp = false;
vector<pair<int,int>> p;
vector<pair<int,int>> q;
vector<pair<int,int>> r;
vector<pair<int,int>> s;
for(auto &[x,y] : a){
if(x == 0 && y == 0){
cout << "1\n";
return;
}
if(x >= 0){
if(y >= 0){
p.push_back({x,y});
}
else{
q.push_back({x,y});
}
}
else{
if(y >= 0){
r.push_back({x,y});
}
else{
s.push_back({x,y});
}
}
}
cout << solve(p) + solve(q) + solve(r) + solve(s) << '\n';
}
int32_t main(){
ios::sync_with_stdio(false);
cin.tie(0);
int tt = 1;
cin >> tt;
while(tt--){
testcase();
}
return (0-0);
}
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