#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    int q;
    cin>>q;
    int sum;
    for(int i=0;i<q;i++)
        {
        int n;
        cin>>n;
        for(int j=0;j<n;j++)
            {
            int x,y;
            cin>>x>>y;
            sum=0;
            if((x*y)==0)
                sum=sum+2;
            else
                sum=sum+3;
            
            
        }
        if(sum%2==0)
            cout<<"YES"<<endl;
        else
            cout<<"NO"<<endl;
        }
    
    return 0;
}