#include <bits/stdc++.h>
using namespace std;
int n, x, y, z, x_, y_, z_;
int main() {
  cin >> n;
  for (int i = 0; i < n; i++) {
    cin >> x_ >> y_ >> z_;
    x += x_;
    z += z_;
    y += y_;
  }
  if (x != 0 || y != 0 || z != 0)
    cout << "NO" << endl;
  else
    cout << "YES" << endl;
  return 0;
}
