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;

namespace AOJ0100
{
    class Program
    {
        public Dictionary<int, ulong> IDs;
        public List<int> target;

        public void Proc()
        {
            while (true)
            {
                string input = Console.ReadLine();
                if (string.IsNullOrEmpty(input)) continue;
                int N = int.Parse(input);
                if (N == 0) break;

                IDs = new Dictionary<int, ulong>();

                for (int i = 0; i < N; i++)
                {
                    input = Console.ReadLine();
                    string[] data_s = input.Split(' ');
                    int ID = int.Parse(data_s[0]);
                    ulong sales = (ulong) (int.Parse(data_s[1]) * int.Parse(data_s[2]));

                    if (IDs.ContainsKey(ID))
                    {
                        IDs[ID] += sales;
                    } else
                    {
                        IDs[ID] = sales;
                    }
                }

                target = new List<int>();

                foreach (KeyValuePair<int, ulong> pair in IDs)
                {
                    if (pair.Value >= 1000000)
                    {
                        target.Add(pair.Key);
                    }
                }

                if (target.Count == 0)
                {
                    Console.WriteLine("NA");
                    continue;
                }

                for (int i = 0; i < target.Count; i++)
                {
                    Console.WriteLine(target[i]);
                }
            }
        }

        static void Main(string[] args)
        {
            Program prg = new Program();
            prg.Proc();
        }
    }
}