The TV station wants to broadcast a 30-episode TV series. If the number of episodes scheduled to be broadcast each day is not equal, how many days can the TV series be broadcast at most?
电视台要播放一部30集电视连续剧，如果要求每天安排播出的集数互不相等，该电视剧最多可以播多少天？
<result>7</result>