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{
  n=gets.to_i
  if n == 0 then 
    break
  end
  hash=Hash.new("none")
  n.times do
    str=gets.chop.split(" ").map{|buf| buf.to_i}
    if hash.key?(str[0]) then 
      hash[str[0]]+=str[1]*str[2]
      else
      hash[str[0]]=str[1]*str[2]
    end
  end
  i=0
  hash.each {|key,value|
    if value >=  1_000_000 then
      puts(key)
      i+=1
    end

  }
  if i == 0 then 
    puts("NA")
  end
}