#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int x = 0, y = 0, z = 0;
  for (int i = 0; i < n; i++) {
    int a, b, c;
    cin >> a >> b >> c;
    x += a;
    y += b;
    c += z;
  }
  if (!x && !y && !z)
    cout << "YES";
  else
    cout << "NO";
}
