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.io.*;
import java.util.*;

class Main{
	public static void main(String[] args){
		BufferedReader sc=new BufferedReader(new InputStreamReader(System.in));
		try{
			while(true){
				int n = Integer.valueOf(sc.readLine());
				if(n==0)
					break;
				Map<String,Long> map = new HashMap<String,Long>();
				String[] key = new String[n];
				int a = 0;
				for(int i=0; i<n; i++){
					String[] st = sc.readLine().split(" ");
					if(map.containsKey(st[0])){
						long t = map.get(st[0])+Integer.valueOf(st[1])*(long)Integer.valueOf(st[2]);
						map.remove(st[0]);
						if(t>=1000000)
							t = 1000000;
						map.put(st[0],t);
					}
					else {
						long t = Integer.valueOf(st[1])*(long)Integer.valueOf(st[2]);
						if(t>=1000000)
							t = 1000000;
						map.put	(st[0],t);
						key[a]=st[0];
						a++;
					}
				}
			boolean flag = true;
			for(int i=0; i<n; i++){
				if(key[i]==null)
					break;
				if(map.get(key[i])==1000000){
					System.out.println(key[i]);
					flag = false;
				}
			}
			if(flag)
				System.out.println("NA");
			}
		}catch(Exception e){
			System.out.println("Error");
			}
		}
}