迷宫是一个二维矩阵,其中0为墙不能通过,1为路可以通过,3为入口,4为出口.要求从入口开始,从出口结束,求得最短路径并输出。-Maze is a two-dimensional matrix, where 0 is the wall is not passed through channel 1, 3 entrance, 4 for export. Requires starting from the inlet, the outlet end, and outputs the calculated shortest path.