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.Text;

class TEST{
	static void Main(){
		
		while(true){
			var n=int.Parse(Console.ReadLine());
			if(n==0)break;
			Dictionary<int,ulong> SaleResult=new Dictionary<int,ulong>();
			for(int i=0;i<n;i++){
				String[] s=Console.ReadLine().Split(' ');
				int shain = int.Parse(s[0]);
				ulong sales =(ulong.Parse(s[1]))*(ulong.Parse(s[2]));
				if(SaleResult.ContainsKey(shain)==false){
					SaleResult.Add(shain,0);
				}
				SaleResult[shain]+=sales;
			}
			int chk=0;
			foreach(int shain in SaleResult.Keys){
				if(SaleResult[shain]>=1000000){
					Console.WriteLine("{0}",shain);
					chk++;
				}
			}
			if(chk==0)Console.WriteLine("NA");		
		}
	}
}