5.3英寸的Galaxy使得智能手机和平板电脑之间的界限变得模糊# PDA - 掌中宝
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On an empty chessboard, a horse starts from a point (say location x, y) and
it starts moving randomly, but once it moves out of board, it can’t come
inside. So what is the total probability that it stays within the board
after N steps?
it starts moving randomly, but once it moves out of board, it can’t come
inside. So what is the total probability that it stays within the board
after N steps?