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;

namespace AOJ.Volume1
{
    class SaleResult
    {
        public static void Main()
        {
            while (true)
            {
                string data_num = Console.ReadLine();
                if (data_num == "0") { break; }

                var sales = new Dictionary<string, long>();
                int cnt = int.Parse(data_num);
                for (int i = 0; i < cnt; i++)
                {
                    var input = Console.ReadLine().Trim().Split(' ');
                    string emp_no = input[0];
                    int price = int.Parse(input[1]);
                    int qty = int.Parse(input[2]);

                    if (sales.ContainsKey(emp_no)) { sales[emp_no] += price * qty; }
                    else { sales.Add(emp_no, price * qty); }
                }
                var output = sales.Where(x => x.Value >= 1000000).Select(y => y);

                if (output.Count() == 0) { Console.WriteLine("NA"); }
                else
                {
                    foreach (var k in output) { Console.WriteLine(k.Key); }
                }
            }
        }
    }
}