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走迷宫
- 给定一个大小为N*M的迷宫。迷宫有通道和墙壁组成,每一步可以向邻接的上下左右的通道移动。请求出从起点到终点所需要的最小步数。(Given a maze of N*M size. The labyrinth is composed of channels and walls, and each step can move to the adjacent, upper and lower channels. The minimum number of steps required from the