#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>

int main() {

    /* Enter your code here. Read input from STDIN. Print output to STDOUT */  
    long int i,j,q,n,k;
    scanf("%ld",&q);
    for(k=0;k<q;k++)
        {
        long int a[n],b[n];
        for(i=0;i<n;i++)
            scanf("%ld%ld",&a[i],&b[i]);
        
       printf("YES\n");
            
        }
    return 0;
}