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 Volume1_0100
{
    class Program
    {
        static void Main(string[] args)
        {
            int dataNum;
            var dataQueue = new Queue<List<Worker>>();

            while ((dataNum = int.Parse(Console.ReadLine())) != 0)
            {
                var workers = new List<Worker>();

                for (int i = 0; i < dataNum; i++)
                {
                    long[] data = Console.ReadLine().Split(' ').Select(long.Parse).ToArray();

                    var worker = new Worker()
                    {
                        Number = (int)data[0],
                        Money = data[1] * data[2]
                    };

                    if (workers.Any(w => w.Number == worker.Number))
                    {
                        workers.Where(w => w.Number == worker.Number).Single().Money += worker.Money;
                    }
                    else
                    {
                        workers.Add(worker);
                    }
                }

                dataQueue.Enqueue(workers);
            }

            foreach (var workers in dataQueue)
            {
                var goodWorkers = workers.Where(w => w.Money >= 1000000);

                foreach (var goodWorker in goodWorkers)
                {
                    Console.WriteLine(goodWorker.Number);
                }

                if (goodWorkers.Count() < 1)
                {
                    Console.WriteLine("NA");
                }
            }
        }
    }

    class Worker
    {
        public int Number { get; set; }
        public long Money { get; set; }
    }
}