#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, x[1000], y[1000], z[1000], t = 0, s = 0, d = 0;
  cin >> n;
  for (int i = 1; i <= n; i++) {
    cin >> x[i] >> y[i] >> z[i];
    t += x[i];
    s += y[i];
    d += z[i];
  }
  if (t == 0 && s == 0 && d == 0)
    cout << "YES";
  else
    cout << "NO";
}
