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: Accepted)

loop do
   break if (n = gets.to_i) == 0
   db = []
   n.times do
      id,p,q = gets.split(" ").map{|x| x.to_i}
      info = db.assoc id
      if info == nil # add new
         db.push [id,p * q]
      else
         info[1] += p * q
      end
   end
   million_over = []
   db.each do |id,sale|
      million_over.push id if sale >= 1_000_000
   end
   if million_over.empty? # no match
      puts "NA"
   else
      million_over.each do |id|
         puts id
      end
   end
end