while True:
    num = int(input())
    if not num: break
    result = {}
    for _ in range(num):
        x, y, z = [int(el) for el in input().split(' ')]
        if x in result:
            result[x] += y*z
        else:
            result[x] = y*z
    res = [print(k) for k,v in result.items() if v >= 1e6]
    if not res: print('NA')