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)

while (n = gets.to_i) > 0
  shain, tanka, suryo = []*n, []*n, []*n
  0.upto(n-1) do |i|
    shain[i], tanka[i], suryo[i] = gets.split(" ").map(&:to_i)
  end
  shain_uriage_sum = {}
  0.upto(n-1) do |i|
    shain_uriage_sum[shain[i]] = 0 if shain_uriage_sum[shain[i]].nil?
    shain_uriage_sum[shain[i]] += tanka[i] * suryo[i]
  end
  flag = false
  shain_uriage_sum.each do |key,val|
    if val >= 1000000
      puts key
      flag = true
    end
  end
  puts "NA" if !flag
end