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.util.*;
public class Main {
 
    public void doIt(){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        while(n != 0){
            //ハッシュを用意する
            HashMap<Integer,Long> list = new HashMap<Integer,Long>();
            //入力順を記憶する配列
            ArrayList<Integer> inputlist = new ArrayList<Integer>();
            for(int i=0; i < n; i++){
                int num = sc.nextInt();
                long sales = sc.nextLong();
                long price = sc.nextLong();
                long sum = sales * price;
                //すでにあるのならカウント追加
                if(list.containsKey(num)){
                    list.put(num, (list.get(num) + sum ));
                }
                else{
                    list.put(num, sum);
                    //配列に格納
                    inputlist.add(num);
                }
            }
 
            boolean flg = false;
            for(int key: inputlist){
                if(list.get(key) >= 1000000){
                    System.out.println(key);
                    flg = true;
                }
            }
            if(!flg){
                System.out.println("NA");
            }
 
            n = sc.nextInt();
        }
 
    }
    public static void main(String[] args) {
        Main obj = new Main();
        obj.doIt();
 
    }
 
}