实现火车的调度，即将无需的乱的火车，重新调度成有序的-Realization train scheduling, without the chaos of the train is about to re-scheduled to orderly

单源最短路径算法，dijkstra算法的实现 给定一些路口和道路，用有向图实现组织这些数据，然后用dijkstra算法找到单源到其他地方的最短路径-As residents of Chicago land, most of us face the realities of heavy traffic. If we attempt to drive on a local freeway during rush hour, we invariably experience major traf