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;
using System.Collections.Generic;
namespace aizu
{
    class OnlineJudge
    {
        public static void Main()
        {
            int count;
            while((count = int.Parse(Console.ReadLine())) != 0){
                Dictionary<int, int> slaves = new Dictionary<int, int>();
                for(int i=0;i < count;++i){
                    var input = (from q in Console.ReadLine().Split() select int.Parse(q)).ToArray<int>();
                    if(slaves.ContainsKey(input[0])){
                        slaves[input[0]] += input[1] * input[2];
                    }
                    else{
                        slaves.Add(input[0], input[1] * input[2]);
                    }
                }
                var people = (from q in slaves where q.Value >= 1000000 select q.Key).ToList();
                if(people.Count() == 0){
                    Console.WriteLine("NA");
                }
                else{
                    foreach(var person in people){
                        Console.WriteLine(person);
                    }
                }
            }
        }
    }
}