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When shipping goods with containers, we have to be careful not to pack some incompatible goods into the same container, or we might get ourselves in s 阅读全文
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The "travelling salesman problem" asks the following question: "Given a list of cities and the distances between each pair of cities, what is the shor 阅读全文
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The lowest common ancestor (LCA) of two nodes U and V in a tree is the deepest node that has both U and V as descendants. Given any two nodes in a bin 阅读全文
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In July 2004, Google posted on a giant billboard along Highway 101 in Silicon Valley (shown in the picture below) for recruitment. The content is supe 阅读全文