单原点最短路径问题算法，在这个问题中，给出有向图G，它的每条边都有一个非负的长度（耗费） a [i ][ j ]，路径的长度即为此路径所经过的边的长度之和。对于给定的源顶点s，需找出从它到图中其他任意顶点（称为目的）的最短路径。-Single-origin issue of the shortest path algorithm, in this issue, given directed graph G, each of which has a non-negative edge length (cost) a [i] [j], that is, the length of the path for this path by After the length of the edge of and. For a given source vertex s, find the need to map from its other arbitrary vertex (known as the purpose of) the shortest path.