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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.LinkedHashMap;
import java.util.Map;

public class Main {

	public static void main(String[] args) throws IOException {

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String line = "";
		StringBuilder result = new StringBuilder();

		Map<Integer, Long> ds = null;

		while ((line = br.readLine()) != null) {

			//
			if (line.indexOf(" ") == -1) {
				if (ds != null) {
					int count = 0;
					for (Integer k : ds.keySet()) {
						if (ds.get(k) >= 1000000) {
							result.append(k + "\n");
							count++;
						}
					}
					if (count == 0) {
						result.append("NA\n");
					}
				}

				// init dataset.
				int n = Integer.parseInt(line);
				if (n == 0) {
					break;
				}
				ds = new LinkedHashMap<Integer, Long>();

				// read data.
				for (int i = 0; i < n; i++) {
					line = br.readLine();
					Integer c = Integer.parseInt(line.split(" ")[0]);
					Long p = Long.parseLong(line.split(" ")[1]);
					Long q = Long.parseLong(line.split(" ")[2]);
					if (ds.containsKey(c)) {
						ds.put(c, (ds.get(c) + p * q));
					} else {
						ds.put(c, p * q);
					}
				}
			}
		}
		System.out.print(result.toString());
	}
}