图算法的一个大作业，根据输入矩阵构成图，不同的值表示四个方向邻接类型，在图中搜索死路，活路的算法。-A large job graph algorithms, based on the input matrix block diagram, showing the four different values ​ ​ of the direction of the adjacent type, the search in the drawing die, the way out of the algorithm.