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)

require 'scanf'
while str = STDIN.gets
    n = str.to_i
    exit 0 if n==0
    hash = Hash.new
    idlist = Array.new
    for i in 0..n-1 do
        #id tanka num
        list = STDIN.gets.scanf("%d %d %d")
        money = list[1] * list[2]
        id = list[0]
        if not hash.has_key?id then
            hash[id] = 0
            idlist.push id
        end
        hash[id] = hash[id] + money
    end
    flag = true
    for i in idlist do
        if hash[i] >= 1000000 then
            print i,"\n" 
            flag = false
        end
    end
    print "NA\n" if flag
end