DIJKstra最短路径 这里路径指两顶点间的通路，路径的长度指所有经过的边的总长。“最短路径”的问题指当两个顶点间通路多于一条时，如何找出边长总和为最短的那条。Dijkstra提出按路径长度递增的次序求最短路径的方法。-DIJKstra path here refers to the shortest path between two vertices of the path, the path length refers to all through the length of the