#include <bits/stdc++.h>
using namespace std;
int main() {
  int i, n;
  int a, b, c;
  int sum_a, sum_b, sum_c;
  sum_a = 0;
  sum_b = 0;
  sum_c = 0;
  cin >> n;
  for (i = 1; i <= n; i++) {
    cin >> a >> b >> c;
    sum_a = sum_a + a;
    sum_b = sum_b + b;
    sum_c = sum_c + c;
  }
  if (sum_a == 0 && sum_b == 0 && sum_c == 0) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
  return 0;
}
