#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main(){
  int n,a,p,c;
  while(std::cin>>n,n){
		vector<int> v;
		vector<int>::iterator it;
    for(;n;n--){
      cin>>a>>p>>c;
      it=find(v.begin(),v.end(),a);
      if(p*c>=1000000&&it-v.end())v.push_back(a);
    }
    if(v.empty())cout<<"NA"<<endl;
    else{
    it = v.begin();
    while(it!=v.end()){
      cout<<*it<<endl;
      it++;
    }
    }
  }
}