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: Wrong Answer)

using System;
using System.Linq;

class MainClass
{
   static void Main(string[] args)
   {
      const int employeeCount = 4000;
      const int salesTarget = 1000000;

      int n = int.Parse(Console.ReadLine());
      while (n != 0)
      {   
         int[] sales = new int[employeeCount];
         for (int i = 0; i < n; i++)
         {
            string[] datas = Console.ReadLine().Split(' ');
            int e = int.Parse(datas[0]);
            long p = int.Parse(datas[1]);
            long q = int.Parse(datas[2]);

            long sale = sales[e - 1] + p * q;
            sales[e - 1] = sale >= salesTarget ? salesTarget : (int)sale;
         }

         var overEmployeeNums = from index in Enumerable.Range(0, employeeCount)
                                where sales[index] >= salesTarget
                                select index + 1;
         if (overEmployeeNums.Count() == 0)
         {
            Console.WriteLine("NA");
         }
         else 
         {
            foreach (int index in overEmployeeNums)
            {
               Console.WriteLine(index.ToString());
            }
         }

         n = int.Parse(Console.ReadLine());
      }
   }
}