import java.io.*;
import java.util.*;

public class Solution {

    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        Scanner in=new Scanner(System.in);
        int q,n,;
        for(i=0;i<q;i++)
            {
            n=in.nextInt();
            int a[][]=new int[n][2];
            for(j=0;j<n;j++)
                {
                a[j][0]=in.nextInt();
                a[j][1]=in.nextInt();
            }
            }
        
        System.out.println(YES);
        System.out.println(NO);
        
        
        
        }
    }
}