#include<iostream>
#include<cstdio>
#include<map>
#include<algorithm>
 
using namespace std;
 
int main()
{
    int T;
    cin>>T;
    while(T--)
    {
        int n;
        cin>>n;
        map< pair<int,int>,bool > m;
        for(int i=0;i<n;i++)
        {
            int a,b;
            scanf("%d %d",&a,&b);
            int g=__gcd(a,b);
            a/=g;
            b/=g;
            m[make_pair(a,b)]=1;
        }
        printf("%d\n",m.size());
    }
}
 

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