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

namespace ConsoleApplication70
{
    class Program
    {
        static void Main(string[] args)
        {
            while (true)
            {
                int[] a = new int[4001];
                List<int> b = new List<int>();
                int c = int.Parse(Console.ReadLine());
                if (c == 0)
                    break;
                for (int d = 0; d < c; d++)
                {
                    int[] e = Console.ReadLine().Split().Select(int.Parse).ToArray();
                    a[e[0]] += e[1] * e[2];
                }
                for (int f = 0; f < 4001; f++)
                    if (a[f] >+ 1000000)
                        b.Add(f);
                if (b.Count == 0)
                    Console.WriteLine("NA");
                
                else for (int g = 0; g < b.Count; g++)
                    Console.WriteLine(b[g]);
            }
        }
    }
}