#include <bits/stdc++.h>
using namespace std;
int main() {
  int num, man, yen, ko;
  int c;
  int p[10] = {};
  while (1) {
    c = 0;
    cin >> num;
    if (!num) break;
    for (int i = 0; i < num; i++) {
      int j = i;
      cin >> man >> yen >> ko;
      if (yen * ko >= 1000000) {
        for (; j > 0; j--) {
          if (p[j - 1] == man) man = 0;
        }
        if (man != 0) {
          p[i] = man;
          cout << man << endl;
          c++;
        }
      }
    }
    if (c == 0) cout << "NA" << endl;
  }
  return 0;
}
