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 ConsoleApplication59
{
    class Program
    {
        static void Main()
        {
            while (true)
            {
                List<int> m = new List<int>();
                int a = int.Parse(Console.ReadLine());
                if (a == 0) break;
                int[] s = new int[4001];
                for (int b = 0; b < a; b++)
                {
                    int[] c = Console.ReadLine().Split().Select(int.Parse).ToArray();
                    s[c[0]] += c[1] * c[2];
                    foreach(int q in m)
                    {
                        if (q == c[0]) goto k;
                    }
                    m.Add(c[0]);
                k:;
                }
                List<int> e = new List<int>();
                for(int d = 0; d < m.Count; d++)
                {
                    if (s[m[d]] >= 1000000) e.Add(m[d]);
                }
                if (e.Count == 0)
                {
                    Console.WriteLine("NA");
                }
                else
                {
                    foreach(int o in e)
                    {
                        Console.WriteLine(o);
                    }
                }
            }
        }
    }
}