#include<iostream.h> int main() {     int k,i,j,t_case,t_piont,count;     int x[1000],y[1000];     cin>>t_case;     if((t_case<1)&&(t_case>1000)) return 0;     for(k=0;k<t_case;k++)     {         count=0;         cin>>t_piont;         for(i=0;i<t_piont;i++)         {             cin>>x[i]>>y[i];       if((x[i]<-10000)&&(x[i]>10000)&&(y[i]<-10000)&&(y[i]>10000))                 return 0;         }         count=t_piont/2;         for(i=0;i<t_piont;i++)             for(j=i+1;j<t_piont;j++)             {                 if(x[i]==x[j])                 {                     if(y[i]==y[j])                         count--;                 }             }         cout<<count<<endl;     }     return 0; }

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