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