用邻接矩阵表示的图的类型 DFS：深度优先遍历的递归算法BFS：广度优先遍历判断从顶点vi到顶点vj是否可达-Adjacency matrix type DFS: depth-first traversal of the recursive algorithm BFS: breadth-first traversal of the judgment from the vertex vi to vertex vj is reachable

通过文件中的信息，进行搜索可达路径，行走过的正确路径标记为1，错误的路径标记为2(Through the information in the file, the search reachable path is searched, the correct path to walk is marked as 1, and the wrong path is marked 2)