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 PHP (judge verdict: Accepted)

<?php

while (true) {
    $dataCount = trim(fgets(STDIN));
    if ($dataCount == 0) { return; }
    
    $dataSet = [];
    for ($i = 0; $i < $dataCount; $i++) {
        list($employeeNum, $ratio, $sale) = explode(' ', trim(fgets(STDIN)));
        if (empty($dataSet[$employeeNum])) {
            $dataSet[$employeeNum] = $ratio * $sale;
        } else {
            $dataSet[$employeeNum] += $ratio * $sale;
        }
    }
    
    $result = [];
    foreach ($dataSet as $key => $value) {
        if ($value >= 1000000) {
            $result[] = $key;
        }
    }
    
    if (empty($result)) {
        $result[] = 'NA';
    }
    
    echo implode(PHP_EOL, $result), PHP_EOL;
}