'indicating the empty cell, the' s' and 't' indicating the start point and the destination of the robot respectively.
显示空单元格，了'S '和'T '表示的开始点和目的地分别机器人。
'indicating the empty cell, the' s' and 't' indicating the start point and the destination of the robot respectively.
显示空单元格，了'S '和'T '表示的开始点和目的地分别机器人。
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