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.ArrayList;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		int n = 0; // ????????????????????°
		long unitPrice = 0; // ?£??????????
		long soldNum = 0; // ?£?????????°
		long number[] = new long[4001]; // ????????????????????????
		boolean flag = false;
		boolean judge[] = new boolean[4001]; // ????????°
		ArrayList<Integer> answer = new ArrayList<Integer>();
		Scanner sc = new Scanner(System.in);
		/**
		 * ???????????\???
		 */
		while (true) {
			n = sc.nextInt();
			int data[] = new int[n]; // ??\???????????????????????¨??????
			if (n == 0) {
				break; // 0??§??????
			}
			for (int i = 0; i < 4001; ++i) {
				number[i] = 0; // ?????????????????????
			}
			for(int i = 0 ; i < 4001; ++i ){
				judge[i] = false; // ?????????k
			}
			for (int j = 0; j < n; ++j) {
				data[j] = sc.nextInt(); // map???????????????????£?,??????????????\???.
				unitPrice = sc.nextLong();
				soldNum = sc.nextLong();
				number[data[j]] += unitPrice * soldNum; // ????????¨?£?????????°??????????????????????????????????´?
			}
			// ??????
			for (int i = 0; i < n; ++i) {
				if (number[data[i]] >= 1000000 && judge[data[i]]!= true) {
					answer.add(data[i]);
					judge[data[i]] = true;
					flag = true;
				}
			}
			if(flag == false){
				answer.add(-1);
			}
			flag = false;
		}
		//??¨???
		for (int i = 0; i < answer.size(); ++i){
			if(answer.get(i) == -1){
				System.out.println("NA");
			}
			else{
		System.out.println(answer.get(i));
			}
		}
		sc.close();
	}

}