两种交通工具选择，飞机和火车，供不同的用户选择，利用迪杰斯特拉算法实现不同的用户选择不同的交通工具，得到最佳旅游路线-The two modes of selection, planes and trains, for different users to choose to use Dijkstra algorithm different users select different modes of transport, the best tourist routes
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