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 Ruby (judge verdict: Wrong Answer)

loop do
   n = gets.to_i
   break if n == 0
   db = {}
   n.times do |i|
      member = gets.split(" ").map{|x|x.to_i}
      db[member[0]] ||= 0
      db[member[0]] += member[1] * member[2]
   end
   million_over = []
   db.each do |id,sale|
      million_over.push id if sale >= 1_000_000
   end
   if million_over.length == 0
      puts "NA"
   else
      million_over.each do |id|
         puts id
      end
   end
end