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 true 
	hash = Hash.new
	n = gets.to_i  #???????????°

	break if n == 0
	for r in 0...n do 
		line = gets.chomp!
		line = line.split

		no = line[0].to_i #????????????
		unitPrice = line[1].to_i #????£???????
		quantity = line[2].to_i #?£??????°???
		total = unitPrice * quantity #?°??¨?

		if hash.key?(no)
			total += hash[no]
		end
		
		hash[no] = total
	end

	if hash.select{|key, val| val >= 1000000}.empty?
		puts "NA"
	else
		hash.each{ |key, val|
			if val >= 1000000
				p key
			end
		}
	end
end