摘要:
Description There is a rectangular room, covered with square tiles. Each tile is colored either red or black. A man is standing on a black til... 阅读全文
posted @ 2015-07-05 22:52
JoneZP
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摘要:
The 15-puzzle has been around for over 100 years; even if you don’t know it by that name, you’ve seen it. It is constructed with 15 sliding ti... 阅读全文
posted @ 2015-07-05 22:34
JoneZP
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