Problem:
Sale Result

There is data on sales of your company. Your task is to write a program which identifies good workers.

The program should read a list of data where each item includes the employee ID i, the amount of sales q and the corresponding unit price p. Then, the program should print IDs of employees whose total sales proceeds (i.e. sum of p × q) is greater than or equal to 1,000,000 in the order of inputting. If there is no such employees, the program should print "NA". You can suppose that n < 4000, and each employee has an unique ID. The unit price p is less than or equal to 1,000,000 and the amount of sales q is less than or equal to 100,000.

Input

The input consists of several datasets. The input ends with a line including a single 0. Each dataset consists of:

n (the number of data in the list)
i p q
i p q
:
:
i p q

Output

For each dataset, print a list of employee IDs or a text "NA"

Sample Input

4
1001 2000 520
1002 1800 450
1003 1600 625
1001 200 1220
2
1001 100 3
1005 1000 100
2
2013 5000 100
2013 5000 100
0

Output for the Sample Input

1001
1003
NA
2013

Solution in C++ (judge verdict: Accepted)

#include <iostream>
#include <cstdio>
#define X 4001
#define V 1000000
using namespace std;

int main(){
	int n;
	while(1){
		cin >> n;
		if(n==0) break;
		long a[X];
		int f[X];
		for(int i=0;i<X;i++) a[i] = 0;
		for(int i=0;i<X;i++) f[i] = 0;
		int b;
		long c,d;
		int s = 0;
		for(int i=0;i<n;i++){
			cin >> b >> c >> d;
			if(a[b]<V) a[b] += c*d;
			if(f[b]==0){
				s++;
				f[b] = s;
			}
		}
		bool e = true;
		for(int i=1;i<X;i++){
			for(int j=0;j<X;j++){
				if(f[j]!=i) continue;
				if(a[j]>=V){
					e = false;
					cout << j << endl;
				}
				break;
			}
		}
		if(e) cout << "NA" << endl;
	}
}