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 JAVA (judge verdict: Wrong Answer)

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		while(true) {
			int n = sc.nextInt();
			if(n == 0) break;
			Map<Integer, Integer> map = new HashMap<Integer, Integer>();		for(int i = 0; i < n; i++) {
				int e = sc.nextInt();
				int p = sc.nextInt();
				int q = sc.nextInt();
				int t = p * q;
				map.merge(e, t, (v1, v2) -> v1 + v2);
			}
			StringBuilder sb = new StringBuilder();
			for(int k : map.keySet()) {
				if(map.get(k) >= 1000000) sb.append(k);
			}
			if(sb.length() == 0) System.out.println("NA");
			else System.out.print(sb.toString());
		}
		sc.close();
	}
}