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)

class EmployeesManager
    @employees = Array.new
    def self.add_sales_employee(id, price, amount)
        employee = @employees.find{|employee| employee.id == id}
        if employee.nil? then
            employee = Employee.new(id)
            @employees.push(employee)
        end
        employee.add_sales(price, amount)
    end
    def self.achieved_employees(quota)
        achieved_employees = Array.new
        @employees.each do |employee|
            achieved_employees.push(employee) if employee.get_sales >= quota
        end
        achieved_employees
    end
    def self.reset
        @employees.clear
    end
end

class Employee
    attr_accessor :id
    @sales
    def initialize(id)
        self.id = id
        @sales = 0
    end
    def add_sales(price, amount)
        @sales += amount * price
    end
    def get_sales
        @sales
    end
end

def settlement
    quota = 1000000
    achieved_employees = EmployeesManager.achieved_employees(quota)
    unless achieved_employees.empty?
        achieved_employees.each do |employee|
            puts employee.id
        end
    else
        puts "NA"
    end
    EmployeesManager.reset
end

while true
    n = gets.chop
    if n == '0' then
        break
    end
    n.to_i.times do
        id, price, amount = gets.split(" ").map(&:to_i)
        EmployeesManager.add_sales_employee(id, price, amount)
    end
    settlement
end