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)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace AOJ
{
	class Program
	{
		static void Main(string[] args)
		{
			while (true)
			{
				int n = int.Parse(Console.ReadLine());
				if (n == 0) break;

				Dictionary<int, long> d = new Dictionary<int, long>();
				List<int> l = new List<int>();

				while (n-- != 0)
				{
					string[] line = Console.ReadLine().Split(' ');
					var num = int.Parse(line[0]);
					var a = long.Parse(line[1]);
					var b = long.Parse(line[2]);
					if (!d.ContainsKey(num))
					{
						l.Add(num);
						d.Add(num, 0);
					}
					d[num] += a * b;
				}
				var f = true;
				for (int i = 0; i < l.Count; i++)
				{
					if (d[l[i]] >= 1000000)
					{
						f = false;
						Console.WriteLine(l[i]);
					}
				}
				if (f) Console.WriteLine("NA");
			}
		}
	}
}