#include <iostream>
#include <cstdio>
using namespace std;

int main(){

  long sale,kosuu,n,bangou;
  while(cin >> n,n){
  int syain[4001] = {0};
    while(n--){
      cin >> bangou >> sale >> kosuu;
      syain[bangou] += kosuu*sale;
    }
    int f = 0;
    for(int i = 1 ; i <= 4000 ; i++  ){
      if(syain[i] >= 1000000){
	cout << i << endl;
	f = 1;
      }
    }
    if(f == 0)cout << "NA" << endl;
  }
}