查询各景点的相关信息；

查询图中任意两个景点间的最短路径；

查询图中任意两个景点间的最经济路径；

根据游客计划的旅游费，为游客推荐最节省的旅游线路与景点-Query information about tourist attractions　query graph in any shortest path between two sites　query graph between any two sites the most economical route　travel costs under the visitors program, save for the tourists the most recommended tourist routes and attractions