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 static void main(String[] args) throws java.io.IOException{
        Scanner scan = new Scanner(System.in);
        
        while(true){
        	int n=scan.nextInt();
        	if(n==0)break;
        	long syatiku[] =new long[4001];
        	for(int i=0;i<4001;i++)syatiku[i] = 0;
        	int []  input =new int [n];
        	for(int i=0;i<n;i++){
        		input[i] = scan.nextInt();
        		syatiku[input[i]]+=scan.nextLong()*scan.nextLong();
        	}
        	boolean flag =true;
        	for(int i=0;i<n;i++){
        		if(syatiku[input[i]]>=1000000){
        			System.out.println(input[i]);
        			syatiku[input[i]] =0;
        			flag =false;
        		}
        	}
        	if(flag)System.out.println("NA");
        }
    }
}