#include <bits/stdc++.h>
int main() {
  long int shain[4000];
  int million[4000];
  int n;
  int i;
  int c = 0;
  long int bango, tanka, kosu;
  scanf("%d", &n);
  while (n != 0) {
    for (i = 0; i < 4000; i++) {
      shain[i] = 0;
      million[i] = 0;
    }
    for (i = 0; i < n; i++) {
      scanf("%d %d %d", &bango, &tanka, &kosu);
      shain[bango - 1] += tanka * kosu;
    }
    for (i = 0; i < 4000; i++) {
      if (shain[i] >= 1000000) {
        million[c] = i + 1;
        c++;
      }
    }
    if (c == 0) {
      printf("NA\n");
    } else {
      for (i = 0; i < c; i++) {
        printf("%d\n", million[i]);
      }
    }
    scanf("%d", &n);
    c = 0;
  }
  return 0;
}
