#include <bits/stdc++.h>
using namespace std;
int n;
pair<int, int> ans;
int solve(int n) {
  int id, p, q, sales[10000] = {};
  for (int i = 0; i < n; i++) {
    cin >> id;
    cin >> p;
    cin >> q;
    sales[id] += p * q;
  }
  ans.first = 0;
  ans.second = 0;
  for (int i = 0; i < 10000; i++) {
    if (ans.second < sales[i]) {
      ans.first = i;
      ans.second = sales[i];
    }
  }
  if (ans.second < 1000000) {
    cout << "NA" << endl;
  } else {
    cout << ans.first << endl;
  }
}
int main() {
  while (1) {
    cin >> n;
    if (n == 0) break;
    solve(n);
  }
}
