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;

class Program {
    static void Main() {
        while (true) {
            var n = int.Parse(Console.ReadLine());
            if (n == 0)
                break;

            var sales = new long[4000];

            for (var i = 0; i < n; i++) {
                var l = Console.ReadLine().Split(' ');
                var id = int.Parse(l[0]);
                long proceeds = long.Parse(l[1]) * int.Parse(l[2]);

                sales[id - 1] += proceeds;
            }

            var found = false;
            for (var i = 0; i < 4000; i++) {
                if (sales[i] >= 1000000) {
                    found = true;
                    Console.WriteLine(i + 1);
                }
            }
            if (!found) {
                Console.WriteLine("NA");
            }
        }
    }
}