摘要:
有一棵二叉树,最大深度为D,且所有叶子的深度都相同。所有结点从上到下从左到右编号为1,2,3,...,2^D-1。在结点1处放一个小球,它会往下落。每个内结点上都有一个开关,初始全部关闭,当每次有小球落到一个开关上时,它的状态都会改变。当小球到达一个内结点时,如果该结点上的开关关闭,则往左走,否者往... 阅读全文
posted @ 2014-07-27 21:07
冷夏的博客园
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A very big corporation is developing its corporative network. In the beginning each of the N enterprises of the corporation, numerated from 1 to N, or... 阅读全文
posted @ 2014-07-27 17:16
冷夏的博客园
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X-PlosivesA secret service developed a new kind of explosive that attain its volatile property only when a specific association of products occurs. Ea... 阅读全文
posted @ 2014-07-27 16:24
冷夏的博客园
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