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 JAVA (judge verdict: Accepted)

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.TreeMap;

public class Main {

	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int n;//????????????????????°
		int e;//????????????
		BigDecimal p;//????£???????
		BigDecimal q;//?£??????°???


		//?????????????????????????????§??????????¶??¶??????????????????¢????????§??????????????\
		while(sc.hasNext()){
			Map<Integer,BigDecimal> saleResultMap=new HashMap<Integer,BigDecimal>();
			List<Integer> eDataList=new ArrayList<Integer>();
			n=sc.nextInt();
			if(n==0)break;
			for(int i=0;i<n;i++){
				e=sc.nextInt();
				p=new BigDecimal(sc.nextInt());
				q=new BigDecimal(sc.nextInt());

				if(saleResultMap.get(e)==null){
					saleResultMap.put(e, p.multiply(q));
					eDataList.add(e);
				}else{
					saleResultMap.put(e, saleResultMap.get(e).add(p.multiply(q)));
				}
			}
			boolean existMillionSeller=false;
			for(int eValue:eDataList){
				BigDecimal result=saleResultMap.get(eValue);
				if(result.compareTo(new BigDecimal(1000000))!=-1){
					existMillionSeller=true;
					System.out.println(eValue);
				}
			}
			if(!existMillionSeller)
				System.out.println("NA");
		}

	}
}