/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
Scanner sc
=new Scanner
(System.
in); int t=sc.nextInt();
while(t-->0){
int max_om=0;
int max_addy=0;
int m=0;
int k=0;
int n=sc.nextInt();
for( int i=0;i<n;i++){
int temp=sc.nextInt();
int count=sc.nextInt();
if(temp>0){
m++;
}
else{
max_om
=Math.
max(max_om,m
); }
max_om
=Math.
max(max_om,m
); if(count>0){
k++;
}
else{
max_addy
=Math.
max(max_addy,m
); }
max_addy
=Math.
max(max_addy,k
); }
if(max_om>max_addy){
}
else if(max_addy>max_om){
}
else{
}
}
// your code goes here
}
}
// your code goes here
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