#include <bits/stdc++.h>
struct employees {
  int i;
  int q;
  int p;
};
int main(void) {
  int n, m;
  struct employees number[4000];
  for (n = 0, m = 0; n < 4000; n++) {
    if (number[n].i == 0) break;
    if (number[n].q * number[n].p >= 1000000) {
      printf("%d\n", number[n].i);
      m++;
    }
    if (m == 0) printf("NA\n");
  }
  return 0;
}
