// solved by Anjan Diyora
 
import java.util.Scanner;
 
class problem1 {
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        int sum1=0;
        int sum2=0;
        int sum3=0;
 
        int n= sc.nextInt();
 
        for (int i = 0; i < n; i++)
        {
            int x = sc.nextInt();
            int y = sc.nextInt();
            int z = sc.nextInt();
 
            for (int j = 0; j < n ; j++)
            {
                sum1= sum1+x;
                sum2= sum2+y;
                sum3= sum3+z;
            }
        }
 
        if(sum1==0 && sum2==0 && sum3==0)
        {
            System.out.println("YES");
        }
        else
        {
            System.out.println("NO");
        }
 
    }
 
}
 
/*
input:
----------------------
3
4 1 7
-2 4 -1
1 -5 -3
______________________
 
Output:
----------------------
NO
 
======================
 
input:
----------------------
3
3 -1 7
-5 2 -4
2 -1 -3
______________________
 
Output:
----------------------
YES
 
 
*/