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: Accepted)

import java.util.Scanner;

public class Main
{
	public static void main(String[] args)
	{
		Scanner scanner = new Scanner(System.in);
		
		for(; ;)
		{
			int n = scanner.nextInt();
			if(n == 0)
			{
				break;
			}
			
			class Data
			{
				int e;
				long sum;
				boolean is_view;
			}
			Data[] data = new Data[n];		
			
			for(int i=0; i<n; i++)
			{
				data[i] = new Data();
				data[i].e = scanner.nextInt();
				long p = scanner.nextLong();
				long q = scanner.nextLong();
				data[i].sum = p * q;
				data[i].is_view = true;
			}
			
			for(int i=0; i<n; i++)
			{
				if(data[i].is_view)
				{
					for(int j=i+1; j<n; j++)
					{
						if(data[i].e == data[j].e)
						{
							data[i].sum += data[j].sum;
							data[j].is_view = false;
						}
					}
				}
			}
			
			int count = 0;
			for(int i=0; i<n; i++)
			{
				if(data[i].is_view && data[i].sum>=1000000)
				{
					System.out.println(data[i].e);
					count ++;
				}
			}
			
			if(count == 0)
			{
				System.out.println("NA");
			}
		}
	}
}