1.　　一条通路的二元组（i, j）数据序列，（i, j）表示通路上某一点的坐标。
2.　　用一种标志（如数字8）在二维数组中标出该条通路，并在屏幕上输出二维数组。
3.　　可以利用一个二维数组maze[i][j]表示迷宫，其中1<=i<=m,1<=j<=n。数组元素值为0表示该位置是墙壁，不能通行；元素值为1表示该位置是通路。假定从maze[1][1]出发，出口位于maze[m][n]，移动方向可以是8个方向（东，东南，南，西南，西，西北，北和东北。(1. the two tuple (I, J) data sequence of a path (I, J) indicating the coordinates of a point on the path.
2. mark the path in a two-dimensional array with a sign (such as number 8) and output a two-dimensional array on the screen.
3. can use a two-dimensional array maze[i][j] represents the maze, where 1<=i<=m, 1<=j<=n. The element value of the array is 0, indicating that the location is a wall and cannot pass; the element value is 1, indicating that the location is the path. Assuming departure from maze[1][1], the exit is located at maze[m][n], and the moving direction can be in 8 directions (East, Southeast, South, southwest, West, northwest, North and northeast).)