给定数据文件格式如下所示：
2017/07/28 qq.com/a
2017/07/28 qq.com/bx
2017/07/28 qq.com/by
2017/07/28 qq.com/by3
2017/07/28 qq.com/news
2017/07/28 sina.com/news/socail
2017/07/28 163.com/ac
2017/07/28 sina.com/news/socail
2017/07/28 163.com/sport
2017/07/28 163.com/ac
2017/07/28 sina.com/play
2017/07/28 163.com/sport
2017/07/28 163.com/ac
2017/07/28 sina.com/movie
2017/07/28 sina.com/play
2017/07/28 sina.com/movie
2017/07/28 163.com/sport
2017/07/28 sina.com/movie2017/07/28 qq.com/a
2017
